A boiler water power safety-based regulation method, system, device and medium

Abstract

The application discloses a boiler water power safety-based regulation and control method, system, device and medium, relates to the safe operation technical field of coal-fired generating units, and comprises the following steps: acquiring the temperature of each region on the water cooling wall in the boiler in real time, and calling the flow of each pipe on the water cooling wall; determining the heat flow rate of each region of the water cooling wall according to the temperature and the flow; determining the target heat flow rate with a relative deviation from the average greater than a preset value in the heat flow rate, the target region corresponding to the target heat flow rate, and the uniformity of the heat flow rate; acquiring the in-furnace monitoring parameters of the boiler in real time; and regulating and controlling the combustion system of the boiler according to the target region, so as to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions. The combustion system is regulated and controlled according to the heat flow rate, the heat flow rates of the regions on the water cooling wall tend to be consistent, the in-furnace monitoring parameters meet preset conditions at the same time of regulation and control, online regulation and control can be realized, and the water power operation safety can be improved.

Description

Technical Field

[0001] This application relates to the field of safe operation technology of coal-fired power units, and in particular to a control method, system, device and medium based on boiler hydrodynamic safety. Background Technology

[0002] Coal-fired power units, especially supercritical units, often experience hydrodynamic instability during operation, threatening their safe and stable operation. Particularly in recent years, the installed capacity of new energy sources has increased significantly. Due to grid peak-shaving pressures, coal-fired units often operate at 50% or even 30% of their rated load for extended periods. This excessively low operating load leads to a substantial reduction in feedwater flow, increasing the risk of flow stagnation, backflow, and heat transfer deterioration. Furthermore, coal-fired units face frequent and rapid load changes, which also pose significant challenges to the safe operation of hydrodynamic systems.

[0003] Currently, hydrodynamic safety issues can be resolved through shutdown maintenance and redesign of structures such as water-cooled walls. During operation, manual adjustments can be made based on the temperature inside the boiler. However, due to the inaccuracy of monitoring data and the technical level of operators, it is difficult to ensure the safe operation of the hydrodynamic system.

[0004] Therefore, how to achieve online control and improve the safety of hydrodynamic operation is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a control method, system, device, and medium based on boiler hydrodynamic safety, to solve the problem that it is currently difficult to ensure the safe operation of hydrodynamics.

[0006] To address the aforementioned technical problems, this application provides a control method based on boiler hydrodynamic safety, comprising:

[0007] The temperature of each area on the water-cooled wall inside the boiler is acquired in real time, and the flow rate of each pipe on the water-cooled wall is retrieved.

[0008] The heat flux of each region of the water-cooled wall is determined based on the temperature and the flow rate. A target heat flux with a relative deviation from the mean greater than a preset value is determined. The target region corresponding to the target heat flux and the uniformity of the heat flux are also determined.

[0009] The boiler's in-furnace monitoring parameters are acquired in real time, and the boiler's combustion system is adjusted according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions.

[0010] Optionally, before invoking the flow rate of each pipe on the water-cooled wall, the method further includes:

[0011] Obtain the pipe layout array on the water-cooled wall, establish a water-cooled wall model based on the pipe layout array, and determine the flow rate of each pipe on the water-cooled wall based on the water-cooled wall model and the total water supply of the water-cooled wall.

[0012] Optionally, if the combustion system includes a burner and a coal mill, and the in-furnace monitoring parameters include an in-furnace temperature field image and the content of each gas, the step of adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions includes:

[0013] Adjust one or a combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle sway angle of the burner, the coal powder fineness and coal powder uniformity of the coal mill;

[0014] And ensure that the distance between the flame center position and the center position of the furnace temperature field image is within a preset distance range, and ensure that the content of each gas is within its corresponding preset content range.

[0015] Optionally, after adjusting the combustion system of the boiler according to the target area to adjust the uniformity to a preset range and ensuring that the in-furnace monitoring parameters meet preset conditions, the method further includes:

[0016] Real-time acquisition of flue gas monitoring parameters of the boiler's tail flue gas system;

[0017] The combustion system is regulated to adjust the flue gas monitoring parameters toward a preset economic operating value corresponding to the operating load, while maintaining the uniformity within the preset range.

[0018] Optionally, the flue gas monitoring parameters include oxygen content, nitrogen oxide content, and flue gas temperature.

[0019] This application also provides a control system based on boiler hydrodynamic safety, applied to the aforementioned control method based on boiler hydrodynamic safety, including: a combustion control system, a hydrodynamic wall temperature monitoring system, and a hydrodynamic monitoring and early warning system;

[0020] The hydrodynamic wall temperature monitoring system is installed on the water-cooled wall of the boiler and is used to monitor the temperature of each area on the water-cooled wall. The hydrodynamic monitoring and early warning system is connected to the combustion control system and the hydrodynamic wall temperature monitoring system respectively, and is used to acquire the temperature and call the flow rate of each pipe on the water-cooled wall in real time. Based on the temperature and the flow rate, the heat flux of each area of ​​the water-cooled wall is determined, the target heat flux with a relative deviation from the mean value is determined to be greater than a preset value, and the target area corresponding to the target heat flux and the uniformity of the heat flux are determined. The combustion control system is used to acquire the furnace monitoring parameters of the boiler in real time, and adjust the combustion system of the boiler according to the target area to adjust the uniformity to a preset range and ensure that the furnace monitoring parameters meet the preset conditions.

[0021] Optionally, the hydrodynamic wall temperature monitoring system includes multiple fiber Bragg grating temperature measuring devices, which are installed on the pipes of the water-cooled wall. Each fiber Bragg grating temperature measuring device includes multiple detection units, which are distributed at intervals along the length of the pipe.

[0022] This application also provides a control device based on boiler hydrodynamic safety, comprising:

[0023] The first acquisition module is used to acquire the temperature of each area on the water-cooled wall inside the boiler in real time, and to call the flow rate of each pipe on the water-cooled wall.

[0024] The first determining module is used to determine the heat flux of each region of the water-cooled wall based on the temperature and the flow rate, determine the target heat flux in which the relative deviation from the mean is greater than a preset value, and determine the target region corresponding to the target heat flux, as well as the uniformity of the heat flux.

[0025] The first control module is used to acquire the furnace monitoring parameters of the boiler in real time, and to control the combustion system of the boiler according to the target area to adjust the uniformity to a preset range and ensure that the furnace monitoring parameters meet the preset conditions.

[0026] This application also provides a control device based on boiler hydrodynamic safety, including a memory for storing computer programs;

[0027] A processor is used to implement the steps of the control method based on boiler hydrodynamic safety when executing the computer program.

[0028] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method based on boiler hydrodynamic safety.

[0029] This application provides a boiler hydrodynamic safety-based control method, comprising: real-time acquisition of the temperature of each region on the water-cooled wall inside the boiler, and access to the flow rate of each pipe on the water-cooled wall; determining the heat flux of each region on the water-cooled wall based on the temperature and flow rate, identifying a target heat flux whose relative deviation from the mean is greater than a preset value, and determining the target region corresponding to the target heat flux, as well as the uniformity of the heat flux; real-time acquisition of the boiler's in-furnace monitoring parameters, and controlling the boiler's combustion system according to the target region to adjust the uniformity to a preset range, and ensuring that the in-furnace monitoring parameters meet preset conditions. Compared to control based solely on boiler temperature, this application considers both temperature and flow rate, determines the heat flux of each region on the water-cooled wall based on temperature and flow rate, and controls the combustion system based on the heat flux to make the heat flux of each region on the water-cooled wall as consistent as possible, and ensures that the in-furnace monitoring parameters meet preset conditions while controlling the system. Therefore, it can improve the safety of hydrodynamic operation while achieving online control.

[0030] The beneficial effects and methods of the control system, device and medium based on boiler hydrodynamic safety provided in this application are as described above. Attached Figure Description

[0031] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart of a control method based on boiler hydrodynamic safety provided in this application embodiment;

[0033] Figure 2 A structural diagram of a control system based on boiler hydrodynamic safety provided in this application embodiment;

[0034] Figure 3 A structural diagram of a control device based on boiler hydrodynamic safety provided in this application embodiment;

[0035] Figure 4 A structural diagram of another control device based on boiler hydrodynamic safety provided in this application embodiment;

[0036] The attached diagram is labeled as follows: 1 is the combustion control system, 2 is the hydrodynamic monitoring and early warning system, 3 is the hydrodynamic wall temperature monitoring system, 4 is the boiler, 5 is the combustion system, 6 is the SCR denitrification system, 7 is the air preheater, 101 is the boiler body monitoring data acquisition device, 102 is the control command sending device, and 103 is the tail system monitoring data acquisition device. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0038] The core of this application is to provide a control method, system, device, and medium based on boiler hydrodynamic safety, for realizing online control and improving the safety of hydrodynamic operation.

[0039] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Figure 1 A flowchart of a control method based on boiler hydrodynamic safety provided for embodiments of this application is shown below. Figure 1 As shown, the control method based on boiler hydrodynamic safety includes:

[0041] S10: Real-time acquisition of temperature in each area of ​​the water-cooled wall inside the boiler, and call the flow rate of each pipe on the water-cooled wall.

[0042] S11: Determine the heat flux of each region of the water-cooled wall based on temperature and flow rate, identify the target heat flux whose relative deviation from the mean is greater than the preset value, and determine the target region corresponding to the target heat flux, as well as the uniformity of the heat flux.

[0043] S12: Real-time acquisition of boiler in-furnace monitoring parameters, adjustment of boiler combustion system according to target area to adjust uniformity to a preset range, and ensure that in-furnace monitoring parameters meet preset conditions.

[0044] Before step S10, and before invoking the flow rate of each pipe on the water-cooled wall, the process includes: obtaining the pipe layout array on the water-cooled wall; establishing a water-cooled wall model based on the pipe layout array; and determining the flow rate of each pipe on the water-cooled wall based on the water-cooled wall model and the total water supply to the water-cooled wall. The pipe layout array includes the inner diameter of each pipe, the material of the pipe, and the connection method between the pipes. Establishing the water-cooled wall model facilitates determining the flow rate of each pipe based on the total water supply. By pre-determining the flow rate of each pipe on the water-cooled wall, the flow rate of each pipe can be directly invoked during regulation, improving the efficiency of regulation.

[0045] In step S11, the heat flux of each region of the water-cooled wall can be determined based on thermal calculations, and the uniformity of the heat flux of each region can be analyzed. First, the mean value of the heat flux is determined, then the relative deviation of the heat flux of each region from the mean value is determined, the target heat flux with a relative deviation greater than a preset value is determined, and the target region corresponding to the target heat flux is determined. Regarding how to determine the uniformity, the uniformity of the heat flux of each region can be represented by calculating the variance or standard deviation of the heat flux.

[0046] In step S12, the furnace monitoring parameters may include the temperature of each area within the furnace and the content of each gas (CO, O2, etc.). The combustion system includes a pulverizing system, burners, and other combustion-related control systems. While regulating the uniformity of the heat flow rate, it is also necessary to ensure that the furnace monitoring parameters meet preset conditions. These preset conditions may include the temperature being within a preset temperature range and the content of each gas being within its corresponding preset content range.

[0047] This application provides a boiler hydrodynamic safety-based control method, comprising: real-time acquisition of the temperature of each region on the water-cooled wall inside the boiler, and access to the flow rate of each pipe on the water-cooled wall; determining the heat flux of each region on the water-cooled wall based on the temperature and flow rate, identifying a target heat flux whose relative deviation from the mean is greater than a preset value, and determining the target region corresponding to the target heat flux, as well as the uniformity of the heat flux; real-time acquisition of the boiler's in-furnace monitoring parameters, and controlling the boiler's combustion system according to the target region to adjust the uniformity to a preset range, and ensuring that the in-furnace monitoring parameters meet preset conditions. Compared to control based solely on boiler temperature, this application considers both temperature and flow rate, determines the heat flux of each region on the water-cooled wall based on temperature and flow rate, and controls the combustion system based on the heat flux to make the heat flux of each region on the water-cooled wall as consistent as possible, and ensures that the in-furnace monitoring parameters meet preset conditions while controlling the system. Therefore, it can improve the safety of hydrodynamic operation while achieving online control.

[0048] Based on the above embodiments, in this application embodiment, if the combustion system includes a burner and a coal mill, and the furnace monitoring parameters include the furnace temperature field image and the content of each gas, the boiler combustion system is adjusted according to the target area to adjust the uniformity to a preset range and ensure that the furnace monitoring parameters meet preset conditions, including: adjusting any one or any combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle angle of the burner, the fineness and uniformity of the coal powder of the coal mill; and ensuring that the distance between the flame center position of the furnace temperature field image and the center position of the furnace temperature field image is within a preset distance range, and ensuring that the content of each gas is within its corresponding preset content range.

[0049] To better understand this application, an example is given below. For instance, when the target area is the upper left region of the water-cooled wall, and the heat flux corresponding to the upper left region is greater than a preset value, the burner nozzle angle can be slightly downward, or the pulverized coal quantity or fineness in the upper left region can be reduced. However, during the adjustment process, it is necessary to ensure that the distance between the flame center position and the center position of the furnace temperature field image is within a preset distance range, thereby ensuring a relatively uniform temperature inside the furnace, not affecting boiler safety, and ensuring that the content of each gas is within its corresponding preset content range.

[0050] Based on the above embodiments, this application embodiment adjusts the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensures that the in-furnace monitoring parameters meet the preset conditions. It also includes: acquiring the flue gas monitoring parameters of the boiler's tail flue gas system in real time; adjusting the combustion system to adjust the flue gas monitoring parameters toward the preset economic operating value corresponding to the operating load, and maintaining the uniformity within the preset range.

[0051] This application does not specifically limit the flue gas monitoring parameters, which mainly include oxygen content, nitrogen oxide content, and flue gas temperature. The specific tail-end flue gas system may include a Selective Catalytic Reduction (SCR) denitrification system and an air preheater 7. The main data collected are the oxygen content and nitrogen oxides at the denitrification inlet of the SCR denitrification system 6, the oxygen concentration and flue gas temperature at the inlet of the air preheater 7, and the oxygen concentration and flue gas temperature at the outlet of the air preheater 7.

[0052] The following example illustrates how to control the combustion system based on flue gas monitoring parameters. If the oxygen concentration is too high, the boiler airflow can be reduced; if the nitrogen oxide concentration is too high, the airflow can be increased; if the exhaust temperature is too high, the flame center position in the furnace temperature field image can be adjusted downwards by controlling the burner nozzle angle. Other control methods exist, but they will not be listed here. The main purpose of these controls is to adjust the flue gas monitoring parameters towards the preset economic operating value corresponding to the operating load, making the flue gas monitoring parameters as close as possible to the preset economic operating value and maintaining uniformity within the preset range. This improves the unit's operating economy without affecting hydrodynamic safety. The preset economic operating value is data obtained through experiments and set in the combustion control system.

[0053] Based on the above embodiments, Figure 2 A structural diagram of a control system based on boiler hydrodynamic safety provided in this application embodiment is shown below. Figure 2As shown, the boiler hydrodynamic safety-based control system includes: a combustion control system 1, a hydrodynamic wall temperature monitoring system 3, and a hydrodynamic monitoring and early warning system 2. The hydrodynamic wall temperature monitoring system 3 is installed on the water-cooled wall of the boiler 4 and is used to monitor the temperature of each area on the water-cooled wall. The hydrodynamic monitoring and early warning system 2 is connected to the combustion control system 1 and the hydrodynamic wall temperature monitoring system 3 respectively, and is used to acquire the temperature and call the flow rate of each pipe on the water-cooled wall in real time. Based on the temperature and flow rate, the heat flow rate of each area of ​​the water-cooled wall is determined, the target heat flow rate with a relative deviation from the mean value greater than the preset value is determined, and the target area corresponding to the target heat flow rate and the uniformity of the heat flow rate are determined. The combustion control system 1 is used to acquire the furnace monitoring parameters of the boiler 4 in real time, and to adjust the combustion system 5 of the boiler 4 according to the target area to adjust the uniformity to the preset range and ensure that the furnace monitoring parameters meet the preset conditions.

[0054] The combustion control system 1 specifically includes a boiler body monitoring data acquisition device 101, a control command sending device 102, and a tail-end system monitoring data acquisition device 103. The boiler body monitoring data acquisition device is mainly used to collect the temperature of various areas on the water-cooled wall monitored by the hydrodynamic wall temperature monitoring system 3 and the internal monitoring parameters of the boiler 4. The control command sending device 102 is mainly used to send commands to the combustion system for regulation. The tail-end system monitoring data acquisition device 103 is mainly used to collect the flue gas monitoring parameters of the SCR denitrification system 6 and the air preheater 7. It should be noted that the hydrodynamic wall temperature monitoring system 3 is located on the water-cooled wall inside the boiler 4 for easy viewing. Figure 2 The Lieutenant General's Hydrodynamic Wall Temperature Monitoring System 3 is shown separately.

[0055] This application does not specifically limit the hydrodynamic wall temperature monitoring system 3. Compared with using resistance temperature detectors (RTDs), using fiber Bragg grating (FBG) temperature measuring devices offers faster temperature detection and simplifies the wiring. Specifically, the hydrodynamic wall temperature monitoring system 3 includes multiple FBG temperature measuring devices, which are installed on the pipes of the water-cooled wall. Each FBG temperature measuring device includes multiple detection units, which are spaced apart along the length of the pipe. Figure 2 As shown, multiple fiber optic temperature measuring devices form a grid-like distribution. By adopting a grid-like measuring point arrangement instead of the traditional single-point arrangement, the temperature distribution of each area of ​​the water-cooled wall can be monitored in real time, greatly improving the accuracy and comprehensiveness of wall temperature monitoring.

[0056] In addition, the hydrodynamic monitoring and early warning system 2 can also verify and calculate the received hydrodynamic wall temperature monitoring data, and provide intelligent early warning for areas where severe working conditions such as water-cooled wall flow stagnation, backflow, and heat transfer deterioration may occur.

[0057] This application provides a boiler hydrodynamic safety-based control system, comprising: a combustion control system, a hydrodynamic wall temperature monitoring system, and a hydrodynamic monitoring and early warning system. The hydrodynamic wall temperature monitoring system is installed on the water-cooled wall of the boiler and is used to monitor the temperature of each area on the water-cooled wall. The hydrodynamic monitoring and early warning system is connected to both the combustion control system and the hydrodynamic wall temperature monitoring system, and is used to acquire the temperature and flow rate of each pipe on the water-cooled wall in real time. Based on the temperature and flow rate, the heat flux of each area of ​​the water-cooled wall is determined, and a target heat flux with a relative deviation from the mean value greater than a preset value is identified. The target area corresponding to the target heat flux and the uniformity of the heat flux are also identified. The combustion control system is used to acquire the boiler's in-furnace monitoring parameters in real time, and to regulate the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions. Compared to regulating solely based on boiler temperature, this application considers both temperature and flow rate, determines the heat flow rate of each region of the water-cooled wall based on temperature and flow rate, and regulates the combustion system according to the heat flow rate to make the heat flow rate of each region of the water-cooled wall as consistent as possible. Furthermore, while regulating, it also ensures that the monitoring parameters in the furnace meet the preset conditions. Therefore, it can improve the safety of hydrodynamic operation while achieving online regulation.

[0058] By replacing traditional thermocouple temperature measurement with a faster-response grating temperature measurement method, a second-level response can be achieved, greatly improving the timeliness of wall temperature monitoring. By replacing the traditional single-point arrangement with a grid-type measuring point layout, the temperature distribution of various areas of the water-cooled wall can be monitored in real time, significantly improving the accuracy and comprehensiveness of wall temperature monitoring. A new hydrodynamic monitoring and early warning system enables intelligent early warning for areas where severe operating conditions such as stagnant flow, backflow, and deteriorated heat transfer may occur in the water-cooled wall. The combustion control system collects multiple parameters, including furnace flame images, furnace gas content, air preheater inlet and outlet parameters, and SCR denitrification system inlet parameters. This allows for the establishment of a dynamic correlation model between real-time flame images, furnace gas content, and other combustion parameters during high-throughput pulverized coal combustion. This enables the development of intelligent combustion control methods based on online monitoring of multiple key parameters, significantly improving the unit's operational economy. By coupling and linking pulverized coal combustion and hydrodynamic operation under different furnace combustion control modes, active control of hydrodynamics through combustion adjustment is achieved, filling the gap in active hydrodynamic control technology and greatly improving the hydrodynamic operation safety of the unit during low load and rapid load change processes.

[0059] In summary, the overall control strategy is based on "hydrodynamic safety as the primary concern and economic operation as a secondary concern," thereby changing the heat load distribution inside the furnace and actively adjusting the heat load distribution in different areas of the water-cooled wall to ensure the hydrodynamic safety of the unit.

[0060] In the above embodiments, the control method and system based on boiler hydrodynamic safety have been described in detail. This application also provides an embodiment of a control device based on boiler hydrodynamic safety. It should be noted that this application describes the embodiment of the device from two perspectives: one is based on functional modules, and the other is based on hardware.

[0061] Figure 3 A structural diagram of a control device based on boiler hydrodynamic safety provided in this application embodiment is shown below. Figure 3 As shown, a control device based on boiler hydrodynamic safety includes:

[0062] The first acquisition module 10 is used to acquire the temperature of each area on the water-cooled wall inside the boiler in real time and to call the flow rate of each pipe on the water-cooled wall.

[0063] The first determining module 11 is used to determine the heat flux of each region of the water-cooled wall based on temperature and flow rate, determine the target heat flux in which the relative deviation from the mean is greater than a preset value, and determine the target region corresponding to the target heat flux, as well as the uniformity of the heat flux.

[0064] The first control module 12 is used to acquire the boiler's in-furnace monitoring parameters in real time, and to control the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet the preset conditions.

[0065] Based on the above embodiments, as a preferred embodiment, it further includes:

[0066] The second determining module is used to obtain the pipe layout array on the water-cooled wall before calling the flow rate of each pipe on the water-cooled wall, to establish a water-cooled wall model based on the pipe layout array, and to determine the flow rate of each pipe on the water-cooled wall based on the water-cooled wall model and the total water supply of the water-cooled wall.

[0067] Based on the above embodiments, as a preferred embodiment, if the combustion system includes a burner and a coal mill, and the in-furnace monitoring parameters include an in-furnace temperature field image and the content of each gas, the first control module includes:

[0068] The adjustment unit is used to adjust any one or a combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle angle of the burner, and the fineness and uniformity of the coal powder in the coal mill; and to ensure that the distance between the flame center position of the furnace temperature field image and the center position of the furnace temperature field image is within a preset distance range, and to ensure that the content of each gas is within its corresponding preset content range.

[0069] Based on the above embodiments, as a preferred embodiment, it further includes:

[0070] The second acquisition module is used to adjust the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet the preset conditions, and then acquire the flue gas monitoring parameters of the boiler's tail flue gas system in real time.

[0071] The second control module is used to control the combustion system to adjust the flue gas monitoring parameters toward the preset economic operating value corresponding to the operating load, and to maintain the uniformity within the preset range.

[0072] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0073] Figure 4 A structural diagram of another control device based on boiler hydrodynamic safety provided in this application embodiment is shown below. Figure 4 As shown, the control device based on boiler hydrodynamic safety includes: a memory 20 for storing computer programs;

[0074] The processor 21 is used to execute computer programs to implement the steps of the control method based on boiler hydrodynamic safety as described in the above embodiments.

[0075] The control device based on boiler hydrodynamic safety provided in this embodiment may include, but is not limited to, smartphones, tablets, laptops, or desktop computers.

[0076] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0077] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, can implement the relevant steps of the boiler hydrodynamic safety-based control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include, but is not limited to, temperature and flow rate.

[0078] In some embodiments, the control device based on boiler hydrodynamic safety may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0079] Those skilled in the art will understand that Figure 4 The structure shown does not constitute a limitation on the control device based on boiler hydrodynamic safety and may include more or fewer components than shown.

[0080] The boiler hydrodynamic safety-based control device provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can perform the following methods: real-time acquisition of the temperature of each area on the water-cooled wall inside the boiler, and call the flow rate of each pipe on the water-cooled wall; determining the heat flow rate of each area of ​​the water-cooled wall based on the temperature and flow rate, determining the target heat flow rate whose relative deviation from the mean is greater than a preset value, and determining the target area corresponding to the target heat flow rate, as well as the uniformity of the heat flow rate; real-time acquisition of the boiler's in-furnace monitoring parameters, and adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range, and ensuring that the in-furnace monitoring parameters meet preset conditions.

[0081] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the above method embodiments.

[0082] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0083] The foregoing provides a detailed description of a boiler hydrodynamic safety-based control method, system, apparatus, and medium. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0084] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A control method based on boiler hydrodynamic safety, characterized in that, include: The temperature of each area on the water-cooled wall inside the boiler is acquired in real time, and the flow rate of each pipe on the water-cooled wall is retrieved. The heat flux of each region of the water-cooled wall is determined based on the temperature and the flow rate. A target heat flux with a relative deviation from the mean greater than a preset value is determined. The target region corresponding to the target heat flux and the uniformity of the heat flux are also determined. The boiler's in-furnace monitoring parameters are acquired in real time, and the boiler's combustion system is adjusted according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions. If the combustion system includes a burner and a coal mill, and the in-furnace monitoring parameters include an in-furnace temperature field image and the content of various gases, the step of adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions includes: Adjust one or a combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle sway angle of the burner, the coal powder fineness and coal powder uniformity of the coal mill; And ensure that the distance between the flame center position of the furnace temperature field image and the center position of the furnace temperature field image is within a preset distance range, and ensure that the content of each gas is within its corresponding preset content range; After adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensuring that the in-furnace monitoring parameters meet preset conditions, the method further includes: Real-time acquisition of flue gas monitoring parameters of the boiler's tail flue gas system; The combustion system is regulated to adjust the flue gas monitoring parameters toward a preset economic operating value corresponding to the operating load, while maintaining the uniformity within the preset range.

2. The control method based on boiler hydrodynamic safety according to claim 1, characterized in that, Before calling the flow rate of each pipe on the water-cooled wall, the method further includes: Obtain the pipe layout array on the water-cooled wall, establish a water-cooled wall model based on the pipe layout array, and determine the flow rate of each pipe on the water-cooled wall based on the water-cooled wall model and the total water supply of the water-cooled wall.

3. The control method based on boiler hydrodynamic safety according to claim 1, characterized in that, The flue gas monitoring parameters include oxygen content, nitrogen oxide content, and flue gas temperature.

4. A control system based on boiler hydrodynamic safety, characterized in that, The control method based on boiler hydrodynamic safety as described in any one of claims 1 to 3 includes: a combustion control system, a hydrodynamic wall temperature monitoring system, and a hydrodynamic monitoring and early warning system; The hydrodynamic wall temperature monitoring system is installed on the water-cooled wall of the boiler and is used to monitor the temperature of each area on the water-cooled wall. The hydrodynamic monitoring and early warning system is connected to the combustion control system and the hydrodynamic wall temperature monitoring system respectively. It is used to acquire the temperature and call the flow rate of each pipe on the water-cooled wall in real time, determine the heat flux of each area of ​​the water-cooled wall based on the temperature and the flow rate, determine the target heat flux with a relative deviation from the mean greater than a preset value, determine the target area corresponding to the target heat flux, and determine the uniformity of the heat flux. The combustion control system is used to acquire the furnace monitoring parameters of the boiler in real time, and adjust the combustion system of the boiler according to the target area to adjust the uniformity to a preset range and ensure that the furnace monitoring parameters meet the preset conditions. If the combustion system includes a burner and a coal mill, and the in-furnace monitoring parameters include an in-furnace temperature field image and the content of various gases, the step of adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet preset conditions includes: Adjust one or a combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle sway angle of the burner, the coal powder fineness and coal powder uniformity of the coal mill; And ensure that the distance between the flame center position of the furnace temperature field image and the center position of the furnace temperature field image is within a preset distance range, and ensure that the content of each gas is within its corresponding preset content range; After adjusting the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensuring that the in-furnace monitoring parameters meet preset conditions, the method further includes: Real-time acquisition of flue gas monitoring parameters of the boiler's tail flue gas system; The combustion system is regulated to adjust the flue gas monitoring parameters toward a preset economic operating value corresponding to the operating load, while maintaining the uniformity within the preset range.

5. The control system based on boiler hydrodynamic safety according to claim 4, characterized in that, The hydrodynamic wall temperature monitoring system includes multiple fiber Bragg grating temperature measuring devices, which are installed on the pipes of the water-cooled wall. Each fiber Bragg grating temperature measuring device includes multiple detection units, which are distributed at intervals along the length of the pipe.

6. A control device based on boiler hydrodynamic safety, characterized in that, include: The first acquisition module is used to acquire the temperature of each area on the water-cooled wall inside the boiler in real time, and to call the flow rate of each pipe on the water-cooled wall. The first determining module is used to determine the heat flux of each region of the water-cooled wall based on the temperature and the flow rate, determine the target heat flux in which the relative deviation from the mean is greater than a preset value, and determine the target region corresponding to the target heat flux, as well as the uniformity of the heat flux. The first control module is used to acquire the furnace monitoring parameters of the boiler in real time, and to control the combustion system of the boiler according to the target area, so as to adjust the uniformity to a preset range and ensure that the furnace monitoring parameters meet the preset conditions. The first control module includes: The adjustment unit is used to adjust any one or a combination of several of the following according to the target area: the air-coal distribution ratio of the burner, the nozzle angle of the burner, and the fineness and uniformity of the coal powder in the coal mill; and to ensure that the distance between the flame center position of the furnace temperature field image and the center position of the furnace temperature field image is within a preset distance range, and to ensure that the content of each gas is within its corresponding preset content range. Also includes: The second acquisition module is used to adjust the boiler's combustion system according to the target area to adjust the uniformity to a preset range and ensure that the in-furnace monitoring parameters meet the preset conditions, and then acquire the flue gas monitoring parameters of the boiler's tail flue gas system in real time. The second control module is used to control the combustion system to adjust the flue gas monitoring parameters toward the preset economic operating value corresponding to the operating load, and to maintain the uniformity within the preset range.

7. A control device based on boiler hydrodynamic safety, characterized in that, Includes memory used to store computer programs; A processor, configured to execute the computer program to implement the steps of the control method based on boiler hydrodynamic safety as described in any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the control method based on boiler hydrodynamic safety as described in any one of claims 1 to 3.

Images