A boiler water supply control system for thermal power plants

Abstract

The invention discloses a boiler water supply control system for a thermal power plant, which belongs to the technical field of thermal power plant equipment control, and comprises: a data acquisition module; a central processing unit; a control execution module; a human-computer interaction interface; and a communication module. The invention significantly improves the control accuracy of boiler water supply by combining high-precision data acquisition with advanced control algorithms, and can control water level fluctuations within a very small range, thereby ensuring stable operation of the boiler and improving power generation efficiency. Through rapid response capabilities, the system can quickly make adjustments regardless of sudden changes in boiler load or changes in other operating conditions, thereby effectively avoiding safety hazards caused by untimely water supply. Through an operating mode that intelligently adapts to a variety of operating conditions, the need for manual intervention is reduced, the labor intensity of operators is reduced, and the automation level and reliability of the system are also improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal power plant equipment control, and in particular relates to a boiler water supply control system for a thermal power plant. Background Art

[0002] In a thermal power plant, the boiler is one of the core equipment, and its stable operation is crucial to the power generation efficiency and safety of the entire power plant. As a key auxiliary system for boiler operation, the boiler water supply system must accurately control the water supply flow and pressure to meet the water demand of the boiler under different operating conditions.

[0003] Traditional boiler water supply control systems often have problems such as low control accuracy, slow response speed, and the inability to make real-time intelligent adjustments based on a variety of complex working conditions. These problems can easily lead to unstable boiler operation, affect power generation efficiency, and may even cause safety accidents. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and to propose a boiler water supply control system for a thermal power plant.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a boiler water supply control system for a thermal power plant, comprising:

[0006] Data acquisition module, used to collect boiler operating parameters, including steam flow, steam pressure, water level, feed water flow, feed water pressure information, and transmit the data to the central processing unit;

[0007] The central processing unit receives information from the data acquisition module, analyzes and processes the data according to the preset control algorithm, and calculates the water flow rate and pressure setting value;

[0008] The control execution module adjusts the speed of the water supply pump and the opening of the valve according to the control instructions of the central processing unit to control the water supply flow and pressure;

[0009] Human-machine interactive interface, used to display boiler operating parameters, control status, and alarm information, allowing operators to set system parameters and view historical operating data and fault records;

[0010] The communication module realizes data communication between the control system and other equipment or monitoring system in the thermal power plant.

[0011] As a further description of the above technical solution:

[0012] The sensors in the data acquisition module are high-precision sensors, wherein the differential pressure flowmeter measures the water flow with an accuracy of ±0.5%, and the radar level meter measures the water level with an error of no more than ±1 cm.

[0013] As a further description of the above technical solution:

[0014] The control execution module adopts variable frequency speed regulation technology to control the water supply pump, with a speed regulation range of 0-50Hz, a water supply flow regulation accuracy of within ±1%, an electric regulating valve opening that can be accurately adjusted from 0-100%, and a response time of less than 2s.

[0015] As a further description of the above technical solution:

[0016] The communication module adopts the industrial Ethernet communication protocol.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. In the present invention, by combining high-precision data acquisition with advanced control algorithms, the control accuracy of boiler water supply is significantly improved, and the water level fluctuation can be controlled within a very small range, ensuring stable operation of the boiler and improving power generation efficiency.

[0019] 2. In the present invention, through rapid response capability, the system can quickly make adjustments regardless of sudden changes in boiler load or changes in other operating conditions, effectively avoiding safety hazards caused by untimely water supply.

[0020] 3. In the present invention, the operation mode is intelligently adapted to various working conditions, which reduces the need for manual intervention and the labor intensity of operators, while also improving the automation level and reliability of the system.

[0021] 4. In the present invention, through the perfect human-machine interaction interface and communication function, it is convenient for operators to monitor and manage the system, and it is also beneficial to the coordinated operation and information management of the entire thermal power plant equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a block diagram of a boiler water supply control system for a thermal power plant. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but only represents the selected embodiment of the present invention. 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. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1 The present invention provides a technical solution: a boiler water supply control system for a thermal power plant, comprising:

[0025] Data acquisition module, used to collect boiler operating parameters, including steam flow, steam pressure, water level, feed water flow, feed water pressure information, and transmit the data to the central processing unit;

[0026] The central processing unit receives information from the data acquisition module, analyzes and processes the data according to the preset control algorithm, and calculates the water flow rate and pressure setting value;

[0027] The control execution module adjusts the speed of the water supply pump and the opening of the valve according to the control instructions of the central processing unit to control the water supply flow and pressure;

[0028] Human-machine interactive interface, used to display boiler operating parameters, control status, and alarm information, allowing operators to set system parameters and view historical operating data and fault records;

[0029] Communication module, which realizes data communication between the control system and other equipment or monitoring system of the thermal power plant;

[0030] The sensors in the data acquisition module are high-precision sensors, among which the differential pressure flowmeter measures the water flow rate with an accuracy of ±0.5%, and the radar level meter measures the water level with an error of no more than ±1 cm;

[0031] The control execution module uses variable frequency speed regulation technology to control the water supply pump, with a speed regulation range of 0-50Hz, a water supply flow regulation accuracy of within ±1%, and an electric regulating valve opening that can be accurately adjusted from 0-100%, with a response time of less than 2s;

[0032] The communication module adopts the industrial Ethernet communication protocol.

[0033] Example:

[0034] Installation and debugging of data acquisition module: Install corresponding sensors in key parts of the boiler such as steam pipes, water supply pipes and steam drums, ensure that the sensors are installed accurately and firmly, and conduct strict calibration and debugging to ensure the accuracy of collected data; for example, the differential pressure flowmeter is installed on the straight pipe section of the water supply pipe, and the length of the front and rear straight pipe sections is not less than 10 times and 5 times the pipe diameter respectively. After installation, use a standard flow device for calibration;

[0035] Programming and algorithm optimization of the central processing unit: Write intelligent control algorithm programs according to the operating characteristics and control requirements of the boiler, and continuously optimize the algorithm parameters during the actual operation process; for example, train and optimize the load change prediction model through a large amount of experimental data and actual operation data to improve the accuracy and reliability of the model;

[0036] Connection and testing of the control execution module: correctly connect the variable frequency speed regulator to the water supply pump, and set relevant parameters, such as the rated power and speed range of the motor; after the electric control valve is connected to the pipeline, perform a sealing test and an opening adjustment test to ensure that the valve can accurately respond to the control signal;

[0037] Design and function realization of human-computer interaction interface: Design a friendly human-computer interaction interface based on the operator's usage habits and system monitoring requirements, realize the programming of functions such as data display, parameter setting, and alarm prompts, and conduct repeated testing and optimization to ensure that the interface is easy to operate and the information display is clear;

[0038] Configuration of communication modules and network construction: configure the parameters of industrial Ethernet communication modules, such as IP address, subnet mask, etc., build a communication network with other equipment or monitoring systems in the thermal power plant, conduct communication tests, and ensure the stability and reliability of data transmission;

[0039] During the operation of the system, the data acquisition module collects the operating parameters of the boiler in real time and transmits them to the central processing unit. The central processing unit analyzes and processes the data according to the preset control algorithm, calculates the optimal water supply flow and pressure setting values, and sends the control instructions to the control execution module. The control execution module adjusts the speed of the water supply pump and the opening of the valve according to the control instructions to achieve precise control of the water supply flow and pressure. The operator can view the system's operating status and set parameters at any time through the human-computer interaction interface, and achieve collaborative operation and data sharing with other equipment through the communication module.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A boiler water supply control system for a thermal power plant, characterized in that: include: Data acquisition module, used to collect boiler operating parameters, including steam flow, steam pressure, water level, feed water flow, feed water pressure information, and transmit the data to the central processing unit; The central processing unit receives information from the data acquisition module, analyzes and processes the data according to the preset control algorithm, and calculates the water flow rate and pressure setting value; The control execution module adjusts the speed of the water supply pump and the opening of the valve according to the control instructions of the central processing unit to control the water supply flow and pressure; Human-machine interactive interface, used to display boiler operating parameters, control status, and alarm information, allowing operators to set system parameters and view historical operating data and fault records; The communication module realizes data communication between the control system and other equipment or monitoring system in the thermal power plant.

2. A boiler water supply control system for a thermal power plant according to claim 1, characterized in that: The sensors in the data acquisition module are high-precision sensors, wherein the differential pressure flowmeter measures the water flow with an accuracy of ±0.5%, and the radar level meter measures the water level with an error of no more than ±1 cm.

3. A boiler water supply control system for a thermal power plant according to claim 1, characterized in that: The control execution module adopts variable frequency speed regulation technology to control the water supply pump, with a speed regulation range of 0-50Hz, a water supply flow regulation accuracy of within ±1%, an electric regulating valve opening that can be accurately adjusted from 0-100%, and a response time of less than 2s.

4. A boiler water supply control system for a thermal power plant according to claim 1, characterized in that: The communication module adopts the industrial Ethernet communication protocol.

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