Chemical dosing control method, system, device and medium for condensate and feedwater systems

Abstract

The application discloses a chemical dosing control method, system, equipment and medium for a condensate water and feed water system, and relates to the technical field of chemical dosing control, and in particular to a chemical dosing control method, system, equipment and medium for a condensate water and feed water system. The method comprises the following steps: acquiring current operation parameters of a dosing system; inputting the current operation parameters of the dosing system into a control model, and generating a control instruction according to an output result of the control model; and controlling a dosing time interval and dosing of an ammonia dosing pump in the dosing system according to the control instruction. The method, system, equipment and medium can solve the problems of nonlinearity and large hysteresis of in-furnace dosing, and simultaneously realize fault diagnosis.

Description

Technical Field

[0001] This invention belongs to the field of power plant chemistry and relates to a chemical dosing control method, system, equipment and medium for condensate and feedwater systems. Background Technology

[0002] Controlling the quality indicators of boiler feedwater or boiler water in power plants is crucial. Precise and stable pH values ​​in condensate and feedwater can significantly reduce metal corrosion and scaling, lowering the probability of boiler water-cooled wall tube ruptures and turbine blade corrosion and scaling. Simultaneously, stable and reasonable chemical dosing control can improve the water treatment cycle time, reduce ammonia usage, and achieve energy conservation and emission reduction. Currently, the dosing rate in power plant boiler chemical dosing systems is typically controlled manually or via DCS using PID control. Manual adjustments cannot provide timely and accurate dosage adjustments; similarly, DCS data analysis and calculation capabilities are limited, and PID control can only adjust the dosage according to changes in specific parameters, exhibiting nonlinearity and significant lag, and failing to achieve advance prediction and intelligent diagnosis of control parameters. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a chemical dosing control method, system, equipment and medium for condensate and feedwater systems. This method, system, equipment and medium can solve the problems of nonlinearity and large hysteresis in in-furnace dosing, and at the same time realize fault diagnosis.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: In one aspect, the present invention provides a method for controlling the chemical dosing of condensate and water supply systems, comprising: Obtain the current operating parameters of the dosing system; The current operating parameters of the dosing system are input into the control model, and control commands are generated based on the output of the control model. The control commands control the ammonia dosing pump in the dosing system to adjust the dosing interval and dosing speed.

[0005] The further improvement of the chemical dosing control method for condensate and water supply systems described in this invention lies in: The current operating parameters of the dosing system include the current unit load information, condensate flow rate information, feedwater flow rate information, condensate pH value information, and feedwater pH value information.

[0006] Also includes: Obtain historical operating parameters of the dosing system; The historical operating parameters of the dosing system are input into the monitoring model to obtain the normal value range of each parameter in the operating parameters of the dosing system.

[0007] Also includes: The current operating parameters of the dosing system and the normal range of the operating parameters of the dosing system are input into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal range. When any parameter exceeds its corresponding normal range, an early warning signal is generated based on the comparison result.

[0008] Also includes: The warning signal is input into the fault diagnosis model; The fault diagnosis model analyzes the fault based on the warning signal and the expert database, generates a solution, and then sends the solution to the DCS system.

[0009] In a second aspect, the present invention provides a chemical dosing control system for condensate and water supply systems, comprising: The first acquisition module is used to acquire the current operating parameters of the dosing system; The first generation module is used to input the current operating parameters of the dosing system into the control model and generate control commands based on the output of the control model. The control module is used to control the dosing interval and dosing speed of the ammonia dosing pump in the dosing system according to the control instructions.

[0010] The chemical dosing control system for condensate and water supply systems described in this invention is further improved in that: Also includes: The second acquisition module is used to acquire historical operating parameters of the dosing system; The second generation module is used to input the historical operating parameters of the dosing system into the patrol model to obtain the normal value range of each parameter in the operating parameters of the dosing system.

[0011] Also includes: The third generation module is used to input the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal value range. When any parameter exceeds its corresponding normal value range, an early warning signal is generated based on the comparison result. The input module is used to input the warning signal into the fault diagnosis model; The fourth generation module is used for the fault diagnosis model to perform fault analysis based on the early warning signal and the expert database, generate a solution, and then send the solution to the DCS system.

[0012] In three aspects, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the chemical dosing control method for the condensate and water supply system.

[0013] In four aspects, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the chemical dosing control method for the condensate and water supply system.

[0014] The present invention has the following beneficial effects: The chemical dosing control method, system, equipment, and medium for condensate and feedwater systems described in this invention, in specific operation, control the dosing interval and dosing rate of the ammonia dosing pump based on a control model. Specifically, the current operating parameters of the dosing system are input into the control model, and control commands are generated based on the output results of the control model. The dosing interval and dosing rate of the ammonia dosing pump in the dosing system are controlled according to the control commands, solving the problems of nonlinearity and large lag in in-furnace dosing, and simultaneously realizing fault diagnosis.

[0015] Furthermore, by comparing real-time and historical data, it can be determined whether the dosing system is operating normally. If parameters are found to be in an abnormal state, timely warnings can be issued, allowing operators to identify and resolve problems in advance. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion regarding the concepts disclosed in the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0018] The accompanying drawings show structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0019] Example 1 refer to Figure 1 The chemical dosing control method for condensate and water supply systems described in this invention includes: 1) Current operating parameters of the dosing system, including current unit load information, condensate flow rate information, feedwater flow rate information, condensate pH value information, and feedwater pH value information; It should be noted that this invention uses a DCS control system to collect key parameters affecting the operation of the dosing system from the dosing system, condensate polishing system, condensate system, water supply system, sampling system, and unit load. The data is then provided to a big data platform, where it is stored and analyzed and calculated during the operation of each model, serving as the basic parameters for analysis, modeling, and control.

[0020] 2) Input the current operating parameters of the dosing system into the control model, generate control commands based on the output of the control model, and control the dosing time interval and dosing speed of the ammonia dosing pump in the dosing system according to the control commands.

[0021] 3) Obtain the historical operating parameters of the dosing system, which include historical unit load information, condensate flow information, feedwater flow information, condensate pH information, and feedwater pH information. Input the historical operating parameters of the dosing system into the monitoring model to obtain the normal range of values ​​for the operating parameters of the dosing system. 4) Input the current operating parameters of the dosing system and the normal range of the operating parameters of the dosing system into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal range. When any parameter exceeds its corresponding normal range, an early warning signal is generated based on the comparison result, and the early warning signal is input into the fault diagnosis model. 5) The fault diagnosis model analyzes the fault based on the warning signal and the expert database, generates a solution, and then sends the solution to the DCS system.

[0022] It should be noted that this invention can replace operators in regularly monitoring and diagnosing the operating status of the in-furnace chemical dosing system, promptly detecting abnormalities that cannot be detected by humans, improving the operational safety of the in-furnace chemical dosing system, and achieving the goal of requiring fewer personnel on duty.

[0023] Example 2 This invention provides a chemical dosing control system for condensate and water supply systems, comprising: The first acquisition module is used to acquire the current operating parameters of the dosing system; The first generation module is used to input the current operating parameters of the dosing system into the control model and generate control commands based on the output of the control model. The control module is used to control the dosing time interval and dosing speed of the ammonia dosing pump in the dosing system according to the control instructions. The second acquisition module is used to acquire historical operating parameters of the dosing system; The second generation module is used to input the historical operating parameters of the dosing system into the patrol model to obtain the normal value range of each parameter in the operating parameters of the dosing system. The third generation module is used to input the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal value range. When any parameter exceeds its corresponding normal value range, an early warning signal is generated based on the comparison result. The input module is used to input the warning signal into the fault diagnosis model; The fourth generation module is used for the fault diagnosis model to perform fault analysis based on the early warning signal and the expert database, generate a solution, and then send the solution to the DCS system.

[0024] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in each embodiment of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0025] Example 3 The present invention also provides a computer device, comprising: a memory for storing a computer program; and a processor for executing the steps of the chemical dosing control method for the condensate and water supply system.

[0026] When the processor executes the computer program, it implements the steps of the above-mentioned chemical dosing control method for condensate and water supply systems, such as: acquiring the current operating parameters of the dosing system; inputting the current operating parameters of the dosing system into the control model, and generating control commands based on the output of the control model; controlling the dosing interval and dosing speed of the ammonia dosing pump in the dosing system according to the control commands; acquiring the historical operating parameters of the dosing system; inputting the historical operating parameters of the dosing system into the monitoring model to obtain the normal value range of each parameter in the operating parameters of the dosing system; inputting the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into the early warning model, the early warning model compares each parameter in the current operating parameters with its corresponding normal value range, and when any parameter exceeds its corresponding normal value range, it generates an early warning signal based on the comparison result; inputting the early warning signal into the fault diagnosis model; the fault diagnosis model performs fault analysis based on the early warning signal and an expert database, generates a solution, and then sends the solution to the DCS system.

[0027] For example, the computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing preset functions. These instruction segments describe the execution process of the computer program in the computer device. For example: a first acquisition module for acquiring the current operating parameters of the dosing system; a first generation module for inputting the current operating parameters of the dosing system into a control model and generating control instructions based on the output of the control model; a control module for controlling the dosing time interval and dosing speed of the ammonia dosing pump in the dosing system according to the control instructions; a second acquisition module for acquiring historical operating parameters of the dosing system; and a second generation module for inputting the historical operating parameters of the dosing system into a... In the monitoring model, the normal value range of each parameter in the operating parameters of the dosing system is obtained; the third generation module is used to input the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal value range. When any parameter exceeds its corresponding normal value range, an early warning signal is generated based on the comparison result; the input module is used to input the early warning signal into the fault diagnosis model; the fourth generation module is used for the fault diagnosis model to perform fault analysis based on the early warning signal and the expert database, generate a solution, and then send the solution to the DCS system.

[0028] The computer device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The computer device may include, but is not limited to, a processor and memory. Those skilled in the art will understand that the above are examples of computer processing devices and do not constitute a limitation on the computer device. It may include more components than described above, or combine certain components, or different components. For example, the computer device may also include input / output devices, network access devices, buses, etc.

[0029] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor, or any conventional processor, etc. The processor is the control center of the computer device, connecting various parts of the computer device through various interfaces and lines.

[0030] The memory can be used to store the computer program and / or module, and the processor implements various functions of the computer device by running or executing the computer program and / or module stored in the memory, and by calling the data stored in the memory.

[0031] The memory may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function (such as sound playback, image playback, etc.); the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMediaCards (SMC), Secure Digital (SD) cards, FlashCards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0032] Example 4 This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps of the chemical dosing control method for a condensate and water supply system, including, for example: acquiring the current operating parameters of the dosing system; inputting the current operating parameters of the dosing system into a control model and generating control commands based on the output of the control model; controlling the dosing interval and dosing speed of the ammonia dosing pump in the dosing system according to the control commands; acquiring the historical operating parameters of the dosing system; inputting the historical operating parameters of the dosing system into a monitoring model to obtain the normal value range of each parameter in the operating parameters of the dosing system; inputting the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into an early warning model, the early warning model comparing each parameter in the current operating parameters with its corresponding normal value range, and generating an early warning signal based on the comparison result when any parameter exceeds its corresponding normal value range; inputting the early warning signal into a fault diagnosis model; the fault diagnosis model performing fault analysis based on the early warning signal and an expert database, generating a solution, and then sending the solution to the DCS system.

[0033] If the modules / units integrated into the chemical dosing control system of the condensate and water supply system are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0034] Based on this understanding, the present invention can implement all or part of the processes in the above-mentioned chemical dosing control method for condensate and water supply systems, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of the above-mentioned chemical dosing control method for condensate and water supply systems. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or preset intermediate form, etc.

[0035] The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0036] It should be noted that the content contained in the computer-readable storage medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0037] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A method for controlling the chemical dosing of condensate and water supply systems, characterized in that, include: Obtain the current operating parameters of the dosing system; The current operating parameters of the dosing system are input into the control model, and control commands are generated based on the output of the control model. The dosing interval and dosing speed of the ammonia dosing pump in the dosing system are controlled according to the control instructions. The current operating parameters of the dosing system include current unit load information, condensate flow rate information, feedwater flow rate information, condensate pH value information, and feedwater pH value information; Also includes: Obtain historical operating parameters of the dosing system; The historical operating parameters of the dosing system are input into the patrol model to obtain the normal value range of each parameter in the operating parameters of the dosing system; Also includes: The current operating parameters of the dosing system and the normal range of the operating parameters of the dosing system are input into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal range. When any parameter exceeds its corresponding normal range, an early warning signal is generated based on the comparison result. Also includes: The warning signal is input into the fault diagnosis model; The fault diagnosis model analyzes the fault based on the warning signal and the expert database, generates a solution, and then sends the solution to the DCS system.

2. A chemical dosing control system for condensate and water supply systems, characterized in that, include: The first acquisition module is used to acquire the current operating parameters of the dosing system; The first generation module is used to input the current operating parameters of the dosing system into the control model and generate control commands based on the output of the control model. The control module is used to control the dosing time interval and dosing speed of the ammonia dosing pump in the dosing system according to the control instructions. Also includes: The second acquisition module is used to acquire historical operating parameters of the dosing system; The second generation module is used to input the historical operating parameters of the dosing system into the patrol model to obtain the normal value range of each parameter in the operating parameters of the dosing system. Also includes: The third generation module is used to input the current operating parameters of the dosing system and the normal value range of the operating parameters of the dosing system into the early warning model. The early warning model compares each parameter in the current operating parameters with its corresponding normal value range. When any parameter exceeds its corresponding normal value range, an early warning signal is generated based on the comparison result. The input module is used to input the warning signal into the fault diagnosis model; The fourth generation module is used for the fault diagnosis model to perform fault analysis based on the early warning signal and the expert database, generate a solution, and then send the solution to the DCS system.

3. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the chemical dosing control method for the condensate and water supply system as described in claim 1.

4. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the chemical dosing control method for the condensate and water supply system as described in claim 1.

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