Method and system for operating rating of thermal power generating unit

Abstract

The invention discloses a thermal power generating unit operation rating method and system, and relates to the technical field of operation rating, and the method comprises the steps of 1, thermal power generating unit information acquisition, 2, thermal power generating unit boiler rating analysis and 3, thermal power generating unit rating processing. According to the method, related data of the economizer, the superheater and the water-cooled wall of the boiler of the thermal power generating unit are analyzed, so that operation rating is carried out on the boiler of the thermal power generating unit, and whether the economizer, the superheater and the water-cooled wall of the boiler of the thermal power generating unit fail or not is judged; therefore, the occurrence rate of the problems of overheating damage, environment harm and the like of the boiler of the thermal power generating unit due to the loss of the economizer, the superheater and the water-cooled wall which belong to the boiler of the thermal power generating unit due to long-term use is reduced, the electricity generation efficiency of the thermal power generating unit is guaranteed, and the safety of the boiler of the thermal power generating unit is improved. Therefore, the health and safety of workers are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of operation rating, and in particular to a method and system for operation rating of a thermal power unit. Background Art

[0002] In thermal power generation, the boiler of the thermal power unit plays an extremely important role. Therefore, it is extremely important to conduct operation rating of the boiler of the thermal power unit to facilitate management. The traditional method of conducting operation rating of the boiler of the thermal power unit is generally through manual rating, which relies too much on manual experience and cannot conduct operation rating of the boiler of the thermal power unit in a timely and accurate manner, which can easily lead to failure of the thermal power unit, thereby affecting normal power supply. Therefore, it is very necessary to conduct operation rating of the boiler of the thermal power unit.

[0003] The prior art, such as the invention patent application with announcement number: CN117333063A, discloses a method and system for rating the operation of thermal power units, which includes: obtaining monthly rating index data of thermal power units; classifying the monthly rating index data of thermal power units; configuring preset unit rating index scoring rules for the classified data; calculating the index scoring value for the classified data according to the unit rating index scoring rules; calculating all unit index scoring values ​​according to multi-level business classification cycles, and rating the operation of thermal power units according to the final scoring data. This invention can complete the unified management and benchmarking ranking display of thermal power unit rating data, realize the automatic generation of unit rating reports, and make unit rating management more flexible and efficient.

[0004] The prior art, such as the invention patent application with announcement number: CN117114417A, discloses a power oscillation risk rating method, device and electronic equipment for a thermal power unit, wherein the method includes: determining the membership information corresponding to the power oscillation risk index according to the operating power change data of the thermal power unit, and obtaining the safety risk level of the thermal power unit according to the risk weight information and the membership information. The key risk indicators of the power oscillation of the thermal power unit are analyzed and scored, so that corresponding measures can be taken to suppress the oscillation risks of different levels in a targeted manner to ensure the smooth operation of the thermal power unit.

[0005] It can be seen from the above scheme that the current thermal power unit operation rating method lacks certain attention to the fault rating analysis based on the relevant data of the superheater, economizer and water-cooled wall of the boiler of the thermal power unit. The superheater, economizer and water-cooled wall of the boiler of the thermal power unit have the functions of heating, energy saving and consumption reduction and overheating prevention respectively. The superheater, economizer and water-cooled wall themselves are pipeline equipment, which are prone to wear and tear during long-term use. In actual application, if one of them is damaged, it will affect the overall operation safety of the boiler of the thermal power unit. If the boiler of the thermal power unit is not shut down in time at this time, it is easy to cause the boiler of the thermal power unit to be overheated and damaged and endanger the environment, which not only reduces the power generation efficiency of the thermal power unit, but also reduces the safety of the boiler of the thermal power unit, thereby endangering the health and safety of the staff. Summary of the invention

[0006] The purpose of the present invention is to provide a method and system for rating the operation of a thermal power unit, which solves the problems existing in the background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: The first aspect of the present invention provides a method for operation rating of a thermal power unit, comprising: Step 1. Acquisition of thermal power unit information: At the current monitoring time point, the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point are obtained, the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point are obtained, and the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness at each preset monitoring point are obtained.

[0008] Step 2. Rating analysis of boilers of thermal power units: evaluate the operating hazard level of the superheater belonging to the boiler of the thermal power unit, evaluate the operating hazard level of the economizer belonging to the boiler of the thermal power unit, and evaluate the operating hazard level of the water-cooled wall belonging to the boiler of the thermal power unit.

[0009] Step 3. Rating and processing of thermal power units: Determine whether the superheater, economizer and water-cooled wall of the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with operation danger.

[0010] Preferably, the evaluation method for evaluating the operation risk level of the superheater of the boiler of the thermal power unit is as follows: based on the characteristic values ​​of each water quality parameter of the water supply to the superheater of the boiler of the thermal power unit, the scaling threat coefficient of the water supply to the superheater of the boiler of the thermal power unit is calculated. .

[0011] According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit, the pipe loss hazard coefficient of the superheater of the boiler of the thermal power unit is calculated. .

[0012] Calculation of the operating risk factor of the boiler superheater of a thermal power unit .

[0013] The operation danger level corresponding to each operation danger coefficient interval of the superheater is obtained from the local database, and the operation danger level of the superheater belonging to the boiler of the thermal power unit is mapped.

[0014] Preferably, the scaling threat coefficient of the water supply to the superheater of the boiler of the thermal power unit is calculated by: obtaining the appropriate value of each water quality parameter from the local database , where x represents the number of each water quality parameter, , y is a positive integer greater than 2.

[0015] Based on the characteristic values ​​of various water quality parameters of the water supply to the superheater of the boiler of the thermal power unit , calculate the scaling coefficient of each water quality parameter of the superheater of the boiler of the thermal power unit .

[0016] Obtain the scaling coefficient of each water quality parameter at each historical monitoring time point since the last superheater descaling from the local database , where i represents each historical monitoring time point, , j is a positive integer greater than 2, and the scaling threat coefficient of the water supply to the superheater of the boiler of the thermal power unit is calculated. .

[0017] Preferably, the specific calculation method for calculating the pipeline loss hazard coefficient of the superheater of the boiler of the thermal power unit is as follows: obtaining the initial pipeline thickness of each pipeline bending monitoring point of the superheater of the boiler of the thermal power unit from the local database and the path length from the furnace , where n represents the number of each pipe bend monitoring point of the superheater, , m is a positive integer greater than 2.

[0018] Calculate the furnace damage coefficient of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , where m is the number of pipe bending monitoring points of the superheater.

[0019] The allowable pipe thickness variation deviation value of each furnace damage coefficient interval is obtained from the local database, and the allowable pipe thickness variation deviation value of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit is mapped. .

[0020] According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , calculate the pipeline loss hazard coefficient of each pipeline bending monitoring point of the superheater of the boiler of the thermal power unit .

[0021] Calculation of pipeline loss hazard coefficient of boiler superheater of thermal power unit .

[0022] Preferably, the specific evaluation method for evaluating the operation risk level of the economizer of the boiler of the thermal power unit is as follows: according to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit, the pipe wear coefficient of the economizer of the boiler of the thermal power unit is calculated. .

[0023] Obtain the flue gas flow rate of the economizer of the boiler of the thermal power unit at each historical monitoring time point from the local database , where N represents the number of each historical monitoring time point, , M is a positive integer greater than 2. According to the flue gas flow rate A of the economizer of the boiler of the thermal power unit, the operation risk coefficient of the economizer of the boiler of the thermal power unit is calculated. , where M is the number of historical monitoring time points.

[0024] The operation risk level corresponding to each operation risk coefficient interval of the economizer is obtained from the local database, and the operation risk level of the economizer belonging to the boiler of the thermal power unit is mapped.

[0025] Preferably, the specific calculation method for calculating the pipe wear coefficient of the economizer of the boiler of the thermal power unit is as follows: obtaining the initial pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit from the local database , where p represents the number of each pipe bend monitoring point of the economizer, , q is a positive integer greater than 2.

[0026] According to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit , calculate the pipe wear coefficient of the economizer of the boiler of the thermal power unit .

[0027] Preferably, the specific evaluation method for evaluating the operation risk level of the water-cooled wall of the boiler of the thermal power unit is as follows: according to the temperature value of each pixel point of the infrared image of each sub-region of the water-cooled wall of the boiler of the thermal power unit, the temperature threat coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is calculated. , where r represents the number of each sub-region, , s is a positive integer greater than 2.

[0028] According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit, the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated. .

[0029] Calculation of the operational risk factor of the water-cooled wall of the boiler of a thermal power unit .

[0030] The operation hazard level corresponding to each operation hazard coefficient interval of the water-cooled wall is obtained from the local database, and the operation hazard level of the water-cooled wall to which the boiler of the thermal power unit belongs is mapped.

[0031] Preferably, the temperature threat coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is calculated by a specific calculation method: obtaining a suitable temperature value C of the water-cooled wall from a local database.

[0032] Based on the temperature value of each pixel of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , where u represents the number of each pixel, , w is a positive integer greater than 2, and the high temperature threat coefficient of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated .

[0033] Calculate the temperature threat coefficient of each sub-area of ​​the water-cooled wall of the boiler of a thermal power unit , where s is the number of sub-regions and w is the number of pixels.

[0034] Preferably, the specific calculation method for calculating the pipe wear coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is as follows: obtaining the initial pipe thickness of each preset monitoring point of each sub-region of the water-cooled wall of the boiler of the thermal power unit from the local database , where G represents the number of each preset monitoring point, , H is a positive integer greater than 2.

[0035] According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , calculate the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit .

[0036] A second aspect of the present invention provides an operation rating system for executing a method for rating the operation of a thermal power unit, comprising: a thermal power unit information module, a thermal power unit rating module and a thermal power unit rating processing module.

[0037] The thermal power unit information module is used to obtain the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point at the current monitoring time point, obtain the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point, and obtain the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness at each preset monitoring point.

[0038] The thermal power unit rating module comprises: a superheater rating analysis unit, an economizer rating analysis unit and a water-cooled wall rating analysis unit.

[0039] The superheater rating analysis unit is used to evaluate the operating risk level of the superheater belonging to the boiler of the thermal power unit.

[0040] The economizer rating analysis unit is used to evaluate the operating risk level of the economizer belonging to the boiler of the thermal power unit.

[0041] The water-cooled wall rating analysis unit is used to evaluate the operating risk level of the water-cooled wall of the boiler of the thermal power unit.

[0042] The thermal power unit rating processing module is used to determine whether the superheater, economizer and water-cooled wall belonging to the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with danger of operation.

[0043] The beneficial effects of the present invention are as follows: (1) Step 1 of the present invention obtains information of the thermal power unit, and obtains relevant data of the economizer, superheater and water-cooled wall of the boiler of the thermal power unit, so as to facilitate subsequent analysis.

[0044] (2) Step 2 of the present invention is to analyze the relevant data of the economizer, superheater and water wall of the boiler of the thermal power unit, thereby performing an operation rating on the boiler to facilitate subsequent processing.

[0045] (3) Step 3 of the present invention is to rate and process the thermal power unit, by judging whether the economizer, superheater and water-cooled wall of the boiler of the thermal power unit are faulty. If a fault occurs, the boiler of the thermal power unit is shut down in time and repaired in time, thereby reducing the occurrence rate of problems such as overheating damage and environmental damage caused by the economizer, superheater and water-cooled wall of the boiler of the thermal power unit due to long-term use. This not only ensures the power generation efficiency of the thermal power unit, but also increases the safety of the boiler of the thermal power unit, thereby ensuring the health and safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 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.

[0047] Figure 1 It is a schematic diagram of the method flow of the present invention.

[0048] Figure 2 It is a schematic diagram of the system module of the present invention.

[0049] Figure 3 It is a schematic diagram of a thermal power unit module of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0051] Reference Figure 1 As shown, the first aspect of the present invention provides a method for rating the operation of a thermal power unit, comprising: Step 1. Acquisition of thermal power unit information: obtaining characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point at the current monitoring time point, obtaining the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point, and obtaining the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness at each preset monitoring point.

[0052] In a specific embodiment, the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point are obtained by a specific acquisition method: the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit are obtained by a water quality detector installed at the water supply port of the boiler of the thermal power unit, and the pipe thickness at each pipe bending monitoring point of the superheater belonging to the boiler of the thermal power unit is obtained by a pipe detector carried by an intelligent robot.

[0053] In a specific embodiment, the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness of each pipe bending monitoring point are obtained by a specific method: the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit is obtained by an airfoil-type velocimeter installed in the tail flue of the boiler of the thermal power unit, and the pipe thickness of each pipe bending monitoring point of the economizer belonging to the boiler of the thermal power unit is obtained by a pipe detector carried by an intelligent robot.

[0054] In a specific embodiment, the temperature value of each pixel point of the infrared image of each sub-region of the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness of each preset monitoring point are obtained by a specific acquisition method: the temperature value of each pixel point of the infrared image of each sub-region of the water-cooled wall belonging to the boiler of the thermal power unit is obtained by an infrared camera, and the pipe thickness of each preset monitoring point of each sub-region of the water-cooled wall belonging to the boiler of the thermal power unit is obtained by a pipeline detector carried by an intelligent robot.

[0055] It should be noted that water quality parameters include: water hardness, water temperature, pH value and concentration ratio.

[0056] Step 1 of the present invention is to obtain information of the thermal power unit, by obtaining relevant data of the economizer, superheater and water-cooled wall of the boiler of the thermal power unit, so as to facilitate subsequent analysis.

[0057] Step 2. Rating analysis of boilers of thermal power units: evaluate the operating hazard level of the superheater belonging to the boiler of the thermal power unit, evaluate the operating hazard level of the economizer belonging to the boiler of the thermal power unit, and evaluate the operating hazard level of the water-cooled wall belonging to the boiler of the thermal power unit.

[0058] It should be noted that the operating hazard levels are divided into: normal and dangerous.

[0059] In a specific embodiment of the present invention, the evaluation method for evaluating the operation risk level of the superheater of the boiler of the thermal power unit is as follows: based on the characteristic values ​​of each water quality parameter of the water supply of the superheater of the boiler of the thermal power unit, the scaling threat coefficient of the water supply of the superheater of the boiler of the thermal power unit is calculated. .

[0060] According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit, the pipe loss hazard coefficient of the superheater of the boiler of the thermal power unit is calculated. .

[0061] Calculation of the operating risk factor of the boiler superheater of a thermal power unit .

[0062] The operation danger level corresponding to each operation danger coefficient interval of the superheater is obtained from the local database, and the operation danger level of the superheater belonging to the boiler of the thermal power unit is mapped.

[0063] It should be noted that the local database is used to store the operating hazard level corresponding to each operating hazard coefficient interval of the superheater, the appropriate value of each water quality parameter, the scaling coefficient of each water quality parameter at each historical monitoring time point since the last superheater descaling, the initial pipe thickness of each pipe bending monitoring point of the superheater belonging to the boiler of the thermal power unit and the path length value from the furnace, the allowable pipe thickness variation deviation value of each furnace damage coefficient interval, the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit at each historical monitoring time point, the operating hazard level corresponding to each operating hazard coefficient interval of the economizer, the initial pipe thickness of each pipe bending monitoring point of the economizer belonging to the boiler of the thermal power unit, the operating hazard level corresponding to each operating hazard coefficient interval of the water-cooled wall, the appropriate temperature value of the water-cooled wall, and the initial pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit.

[0064] In a specific embodiment of the present invention, the scaling threat coefficient of the water supply of the superheater of the boiler of the thermal power unit is calculated by: obtaining the appropriate value of each water quality parameter from the local database , where x represents the number of each water quality parameter, , y is a positive integer greater than 2.

[0065] Based on the characteristic values ​​of various water quality parameters of the water supply to the superheater of the boiler of the thermal power unit , calculate the scaling coefficient of each water quality parameter of the superheater of the boiler of the thermal power unit .

[0066] Obtain the scaling coefficient of each water quality parameter at each historical monitoring time point since the last superheater descaling from the local database , where i represents each historical monitoring time point, , j is a positive integer greater than 2, and the scaling threat coefficient of the water supply to the superheater of the boiler of the thermal power unit is calculated. .

[0067] In a specific embodiment of the present invention, the specific calculation method for calculating the pipeline loss hazard coefficient of the superheater of the boiler of the thermal power unit is as follows: the initial pipeline thickness of each pipeline bending monitoring point of the superheater of the boiler of the thermal power unit is obtained from the local database. and the path length from the furnace , where n represents the number of each pipe bend monitoring point of the superheater, , m is a positive integer greater than 2.

[0068] Calculate the furnace damage coefficient of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , where m is the number of pipe bending monitoring points of the superheater.

[0069] The allowable pipe thickness variation deviation value of each furnace damage coefficient interval is obtained from the local database, and the allowable pipe thickness variation deviation value of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit is mapped. .

[0070] According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , calculate the pipeline loss hazard coefficient of each pipeline bending monitoring point of the superheater of the boiler of the thermal power unit .

[0071] Calculation of pipeline loss hazard coefficient of boiler superheater of thermal power unit .

[0072] In a specific embodiment of the present invention, the evaluation method for evaluating the operation risk level of the economizer of the boiler of the thermal power unit is as follows: according to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit, the pipe wear coefficient of the economizer of the boiler of the thermal power unit is calculated. .

[0073] Obtain the flue gas flow rate of the economizer of the boiler of the thermal power unit at each historical monitoring time point from the local database , where N represents the number of each historical monitoring time point, , M is a positive integer greater than 2. According to the flue gas flow rate A of the economizer of the boiler of the thermal power unit, the operation risk coefficient of the economizer of the boiler of the thermal power unit is calculated. , where M is the number of historical monitoring time points.

[0074] The operation risk level corresponding to each operation risk coefficient interval of the economizer is obtained from the local database, and the operation risk level of the economizer belonging to the boiler of the thermal power unit is mapped.

[0075] In a specific embodiment of the present invention, the specific calculation method for calculating the pipe wear coefficient of the economizer of the boiler of the thermal power unit is as follows: the initial pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit is obtained from the local database. , where p represents the number of each pipe bend monitoring point of the economizer, , q is a positive integer greater than 2.

[0076] According to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit , calculate the pipe wear coefficient of the economizer of the boiler of the thermal power unit .

[0077] In a specific embodiment of the present invention, the evaluation method for evaluating the operation risk level of the water-cooled wall of the boiler of the thermal power unit is as follows: based on the temperature value of each pixel point of the infrared image of each sub-region of the water-cooled wall of the boiler of the thermal power unit, the temperature threat coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is calculated. , where r represents the number of each sub-region, , s is a positive integer greater than 2.

[0078] According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit, the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated. .

[0079] Calculation of the operational risk factor of the water-cooled wall of the boiler of a thermal power unit .

[0080] The operation hazard level corresponding to each operation hazard coefficient interval of the water-cooled wall is obtained from the local database, and the operation hazard level of the water-cooled wall to which the boiler of the thermal power unit belongs is mapped.

[0081] In a specific embodiment of the present invention, the temperature threat coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is calculated by: obtaining the appropriate temperature value C of the water-cooled wall from the local database.

[0082] Based on the temperature value of each pixel of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , where u represents the number of each pixel, , w is a positive integer greater than 2, and the high temperature threat coefficient of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated .

[0083] Calculate the temperature threat coefficient of each sub-area of ​​the water-cooled wall of the boiler of a thermal power unit , where s is the number of sub-regions and w is the number of pixels.

[0084] In a specific embodiment of the present invention, the specific calculation method for calculating the pipe wear coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is as follows: the initial pipe thickness of each preset monitoring point of each sub-region of the water-cooled wall of the boiler of the thermal power unit is obtained from the local database. , where G represents the number of each preset monitoring point, , H is a positive integer greater than 2.

[0085] According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , calculate the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit .

[0086] Step 2 of the present invention is to analyze the rating of the boiler of the thermal power unit, by analyzing the relevant data of the economizer, superheater and water-cooled wall of the boiler of the thermal power unit, so as to perform an operation rating on the boiler to facilitate subsequent processing.

[0087] Step 3. Rating and processing of thermal power units: Determine whether the superheater, economizer and water-cooled wall of the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with operation danger.

[0088] In a specific embodiment, the determination of whether the superheater, economizer and water-cooled wall belonging to the boiler of the thermal power unit are in danger of operation is performed in the following specific method: if the operating danger level of the superheater belonging to the boiler of the thermal power unit is dangerous, then it is determined that the superheater belonging to the boiler of the thermal power unit is in danger of operation; if the operating danger level of the economizer belonging to the boiler of the thermal power unit is dangerous, then it is determined that the economizer belonging to the boiler of the thermal power unit is in danger of operation; if the operating danger level of the water-cooled wall belonging to the boiler of the thermal power unit is dangerous, then it is determined that the water-cooled wall belonging to the boiler of the thermal power unit is in danger of operation.

[0089] Step 3 of the present invention is to rate and process the thermal power unit, by judging whether the economizer, superheater and water-cooled wall of the boiler of the thermal power unit are faulty. If a fault occurs, the boiler of the thermal power unit is shut down in time and repaired in time, thereby reducing the occurrence rate of problems such as overheating damage and environmental damage caused by the economizer, superheater and water-cooled wall of the boiler of the thermal power unit due to long-term use. It not only ensures the power generation efficiency of the thermal power unit, but also increases the safety of the boiler of the thermal power unit, thereby ensuring the health and safety of the staff.

[0090] Reference Figure 2 As shown, the second aspect of the present invention provides a system for executing an operation rating method of a thermal power unit operation rating, comprising: a thermal power unit information module, a thermal power unit rating module, a thermal power unit rating processing module and a local database.

[0091] It should be noted that the thermal power unit information module is connected to the thermal power unit rating module, the thermal power unit rating module is connected to the thermal power unit rating processing module, and the local database is connected to the thermal power unit information module, the thermal power unit rating module, and the thermal power unit rating processing module.

[0092] The thermal power unit information module is used to obtain the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point at the current monitoring time point, obtain the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point, and obtain the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness at each preset monitoring point.

[0093] Reference Figure 3 As shown, the thermal power unit rating module includes: a superheater rating analysis unit, an economizer rating analysis unit and a water-cooled wall rating analysis unit.

[0094] The superheater rating analysis unit is used to evaluate the operating risk level of the superheater belonging to the boiler of the thermal power unit.

[0095] The economizer rating analysis unit is used to evaluate the operating risk level of the economizer belonging to the boiler of the thermal power unit.

[0096] The water-cooled wall rating analysis unit is used to evaluate the operating risk level of the water-cooled wall of the boiler of the thermal power unit.

[0097] The thermal power unit rating processing module is used to determine whether the superheater, economizer and water-cooled wall belonging to the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with danger of operation.

[0098] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art 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 concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for rating the operation of a thermal power unit, characterized in that: include: Step 1. Acquisition of thermal power unit information: At the current monitoring time point, characteristic values ​​of various water quality parameters of the water supply to the superheater of the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point are obtained, the flue gas flow rate of the economizer of the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point are obtained, and the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit and the pipe thickness at each preset monitoring point are obtained; Step 2. Rating analysis of boilers of thermal power units: evaluate the operating risk level of the superheater of the boiler of the thermal power unit, evaluate the operating risk level of the economizer of the boiler of the thermal power unit, and evaluate the operating risk level of the water-cooled wall of the boiler of the thermal power unit; Step 3. Rating and processing of thermal power units: Determine whether the superheater, economizer and water-cooled wall of the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with operation danger.

2. A method for rating the operation of a thermal power unit according to claim 1, characterized in that: The specific evaluation method for evaluating the operation risk level of the superheater of the boiler of the thermal power unit is as follows: According to the characteristic values ​​of the water quality parameters of the boiler superheater of the thermal power unit, the scaling threat coefficient of the boiler superheater of the thermal power unit is calculated. ; According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit, the pipe loss hazard coefficient of the superheater of the boiler of the thermal power unit is calculated. ; Calculation of the operating risk factor of the boiler superheater of a thermal power unit ; The operation danger level corresponding to each operation danger coefficient interval of the superheater is obtained from the local database, and the operation danger level of the superheater belonging to the boiler of the thermal power unit is mapped.

3. A method for rating the operation of a thermal power unit according to claim 2, characterized in that: The specific calculation method of the scaling threat coefficient of the water supply of the superheater of the boiler of the thermal power unit is as follows: Obtain appropriate values ​​for each water quality parameter from the local database , where x represents the number of each water quality parameter, , y is a positive integer greater than 2; Based on the characteristic values ​​of various water quality parameters of the water supply to the superheater of the boiler of the thermal power unit , calculate the scaling coefficient of each water quality parameter of the superheater of the boiler of the thermal power unit ; Obtain the scaling coefficient of each water quality parameter at each historical monitoring time point since the last superheater descaling from the local database , where i represents each historical monitoring time point, , j is a positive integer greater than 2, and the scaling threat coefficient of the water supply to the superheater of the boiler of the thermal power unit is calculated. .

4. A method for rating the operation of a thermal power unit according to claim 2, characterized in that: The specific calculation method for calculating the pipeline loss hazard coefficient of the superheater of the boiler of the thermal power unit is as follows: Obtain the initial pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit from the local database and the path length from the furnace , where n represents the number of each pipe bend monitoring point of the superheater, , m is a positive integer greater than 2; Calculate the furnace damage coefficient of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , where m is the number of pipe bending monitoring points of the superheater; The allowable pipe thickness variation deviation value of each furnace damage coefficient interval is obtained from the local database, and the allowable pipe thickness variation deviation value of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit is mapped. ; According to the pipe thickness of each pipe bending monitoring point of the superheater of the boiler of the thermal power unit , calculate the pipeline loss hazard coefficient of each pipeline bending monitoring point of the superheater of the boiler of the thermal power unit ; Calculation of pipeline loss hazard coefficient of boiler superheater of thermal power unit .

5. A method for rating the operation of a thermal power unit according to claim 1, characterized in that: The specific evaluation method for evaluating the operation risk level of the economizer of the boiler of the thermal power unit is as follows: According to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit, the pipe wear coefficient of the economizer of the boiler of the thermal power unit is calculated. ; Obtain the flue gas flow rate of the economizer of the boiler of the thermal power unit at each historical monitoring time point from the local database , where N represents the number of each historical monitoring time point, , M is a positive integer greater than 2. According to the flue gas flow rate A of the economizer of the boiler of the thermal power unit, the operation risk coefficient of the economizer of the boiler of the thermal power unit is calculated. , where M is the number of historical monitoring time points; The operation risk level corresponding to each operation risk coefficient interval of the economizer is obtained from the local database, and the operation risk level of the economizer belonging to the boiler of the thermal power unit is mapped.

6. A method for rating the operation of a thermal power unit according to claim 5, characterized in that: The specific calculation method for calculating the pipe wear coefficient of the economizer of the boiler of the thermal power unit is as follows: Obtain the initial pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit from the local database , where p represents the number of each pipe bend monitoring point of the economizer, , q is a positive integer greater than 2; According to the pipe thickness of each pipe bending monitoring point of the economizer of the boiler of the thermal power unit , calculate the pipe wear coefficient of the economizer of the boiler of the thermal power unit .

7. A method for rating the operation of a thermal power unit according to claim 1, characterized in that: The specific evaluation method for evaluating the operation risk level of the water-cooled wall of the boiler of the thermal power unit is as follows: According to the temperature value of each pixel point of the infrared image of each sub-region of the water-cooled wall of the boiler of the thermal power unit, the temperature threat coefficient of each sub-region of the water-cooled wall of the boiler of the thermal power unit is calculated. , where r represents the number of each sub-region, , s is a positive integer greater than 2; According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit, the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated. ; Calculation of the operational risk factor of the water-cooled wall of the boiler of a thermal power unit ; The operation hazard level corresponding to each operation hazard coefficient interval of the water-cooled wall is obtained from the local database, and the operation hazard level of the water-cooled wall to which the boiler of the thermal power unit belongs is mapped.

8. A method for rating the operation of a thermal power unit according to claim 7, characterized in that: The specific calculation method for calculating the temperature threat coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is as follows: Obtain the appropriate temperature value C of the water-cooled wall from the local database; Based on the temperature value of each pixel of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , where u represents the number of each pixel, , w is a positive integer greater than 2, and the high temperature threat coefficient of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is calculated ; Calculate the temperature threat coefficient of each sub-area of ​​the water-cooled wall of the boiler of a thermal power unit , where s is the number of sub-regions and w is the number of pixels.

9. A method for rating the operation of a thermal power unit according to claim 7, characterized in that: The specific calculation method for calculating the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit is as follows: Obtain the initial pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit from the local database , where G represents the number of each preset monitoring point, , H is a positive integer greater than 2; According to the pipe thickness of each preset monitoring point in each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit , calculate the pipe wear coefficient of each sub-area of ​​the water-cooled wall of the boiler of the thermal power unit .

10. An operation rating system for executing the method for operation rating of a thermal power unit according to any one of claims 1 to 9, characterized in that: include: Thermal power unit information module, thermal power unit rating module and thermal power unit rating processing module; The thermal power unit information module is used to obtain the characteristic values ​​of various water quality parameters of the water supply to the superheater belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point at the current monitoring time point, obtain the flue gas flow rate of the economizer belonging to the boiler of the thermal power unit and the pipe thickness at each pipe bending monitoring point, and obtain the temperature value of each pixel point of the infrared image of each sub-area of ​​the water-cooled wall belonging to the boiler of the thermal power unit and the pipe thickness at each preset monitoring point; The thermal power unit rating module includes: a superheater rating analysis unit, an economizer rating analysis unit and a water-cooled wall rating analysis unit; The superheater rating analysis unit is used to evaluate the operating risk level of the superheater belonging to the boiler of the thermal power unit; The economizer rating analysis unit is used to evaluate the operating risk level of the economizer belonging to the boiler of the thermal power unit; The water-cooled wall rating and analysis unit is used to evaluate the operation risk level of the water-cooled wall of the boiler of the thermal power unit; The thermal power unit rating processing module is used to determine whether the superheater, economizer and water-cooled wall belonging to the boiler of the thermal power unit are in danger of operation. If at least one of them is in danger of operation, the boiler of the thermal power unit will be temporarily shut down, and the person in charge of maintenance and safety of the thermal power unit will be notified to inspect and repair the equipment belonging to the boiler of the thermal power unit with danger of operation.

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