Boiler feed water control method and system based on comprehensive water pump house

Abstract

The invention discloses a boiler feed water control method and system based on a comprehensive water pump house, and relates to the field of thermal power plant boiler feed water control, and the method comprises the steps: collecting water quality detection data, determining a water taking source according to a detection result, and determining the water taking amount based on a water source supply amount prediction system; pre-treating the taken raw water, storing the raw water into a storage tank, setting a water supply scheme according to the water supply requirement of the boiler, pumping the raw water in the storage tank into the boiler by a comprehensive water pump room, and adjusting the water flow in real time during water pumping; the three-impulse control strategy is implemented to control the boiler water level, the water quality and the water level in the boiler are monitored in real time, and if abnormity exists, fault early warning is carried out. Through the water quality detection system, the optimal water source is determined, water is taken in advance based on the predicted future water supply amount, the stability of the water supply amount is guaranteed, and through the implementation of the optimal combination operation strategy and the variable frequency speed regulation technology of the pump, the starting and stopping frequency of the pump is reduced, the energy consumption of the pump is reduced, and the overall energy utilization efficiency of the system is improved.

Description

Technical Field

[0001] The invention relates to the field of boiler feed water control in thermal power plants, and in particular to a boiler feed water control method and system based on an integrated water pump room. Background Art

[0002] In thermal power companies, the boiler feed water system plays a vital role. Its main functions are as follows:

[0003] Ensure safe operation of the boiler: The boiler water supply system can provide a stable water source for the boiler, maintain the boiler water level within a safe range, and prevent safety accidents such as explosions caused by lack of water.

[0004] Improve boiler efficiency: By accurately controlling the water supply, the boiler can be ensured to operate under optimal conditions, improve thermal efficiency and reduce energy consumption.

[0005] Prolong boiler life: Reasonable feed water control can reduce scaling and corrosion inside the boiler, thereby extending the service life of the boiler.

[0006] Ensure steam quality: By controlling the quality of feed water, it can be ensured that the high-quality steam generated meets the needs of the cogeneration system.

[0007] In the existing boiler water supply scheme, there is a risk of water source pollution during the raw water collection process. If the water source is polluted, the quality of the collected raw water may be unstable, affecting the subsequent treatment effect. In addition, the water source water volume is affected by seasonal changes, resulting in unstable water supply.

[0008] Furthermore, due to improper control strategies, traditional feed water pumps may start and stop frequently, shortening the service life of the pump. The feed water regulation system may cause system fluctuations due to external interference or improper parameter settings. Due to inaccurate feed water regulation, the boiler water level may fluctuate greatly, affecting the safe operation of the boiler.

[0009] In view of the above problems and challenges, the existing boiler feed water control method and system can no longer meet the requirements of thermal power companies for safe, efficient and energy-saving operation of boilers. Therefore, the present invention proposes a boiler feed water control method and system based on an integrated water pump room, aiming to solve the deficiencies in the existing technology and realize accurate, efficient and automatic control of boiler feed water, thereby improving the safety, economy and environmental protection of boiler operation. Summary of the invention

[0010] In view of the above-mentioned problems, the present invention is proposed.

[0011] Therefore, the problem to be solved by the present invention is that in the existing boiler water supply scheme, there are water source pollution risks and unstable water volume problems during the raw water collection process. In addition, due to improper control strategies, the traditional water supply pump may start and stop frequently, shortening the service life of the pump. In addition, due to the inaccurate water supply regulation, the boiler water level may fluctuate greatly, affecting the safe operation of the boiler.

[0012] To solve the above technical problems, the present invention provides the following technical solutions: a boiler feed water control method based on an integrated water pump room, which includes collecting water quality test data, determining the water source according to the test results, and determining the water intake based on a water source supply prediction system; pre-treating the raw water obtained, storing the raw water in a storage tank, setting a water supply plan according to the boiler feed water demand, and the integrated water pump room pumps the raw water in the storage tank into the boiler, and adjusts the water flow in real time during pumping; implementing a three-impulse control strategy to control the boiler water level, and monitoring the water quality and water level in the boiler in real time. If there is an abnormality, a fault warning is issued.

[0013] As a preferred embodiment of the boiler feed water control method based on an integrated water pump room described in the present invention, the method comprises: determining the water source according to the test results comprises: installing a water quality test system at the raw water collection point to test the water source, and the collected water quality test data comprises the organic matter content in the water, the total organic carbon content in the water, the suspended solids content in the water, the heavy metal ion concentration in the water, and the number of bacteria and pathogens in the water; weighting the tested parameters to obtain a water quality value, and comparing the water quality value with a preset threshold value, if it is less than the preset threshold value, the system operates normally, and if it is greater than the preset threshold value, it is determined to be water source pollution; when it is determined to be water source pollution, if there is a backup water source, it automatically switches to the backup water source, and starts the backup water source collection system; if there is no backup water source, the pollution alarm and water quality data are uploaded to the central control system, and the pretreatment system is adjusted to the emergency mode to enhance the water quality treatment effect.

[0014] As a preferred embodiment of the boiler feed water control method based on an integrated water pump room described in the present invention, the water intake is determined based on the water supply prediction system, including: using historical water supply data, combining weather forecasts and seasonal change models to establish a water supply prediction system, wherein the seasonal change model is trained based on historical seasonal precipitation change data; according to the future water supply output by the prediction system, a corresponding water intake strategy is formulated, including: if the predicted water supply is sufficient, then maintaining conventional water intake operations; if the predicted water supply is insufficient, then starting an excess water intake program, increasing the water intake, and storing the excess water in a regulating tank, and the control system in the integrated water pump room adjusts the operating status of the water pump in real time according to the water level in the tank to ensure the water intake, storage and supply process.

[0015] As a preferred embodiment of the boiler feed water control method based on an integrated water pump room described in the present invention, the pretreatment of the raw water includes: removing large solid particles in the raw water by alternating coarse and fine grids at the water intake, settling and separating suspended matter in the raw water through a sedimentation tank and a clarification tank, softening the raw water and removing impurities through ion exchange and reverse osmosis, and finally storing the raw water in a storage tank through a filter screen.

[0016] As a preferred solution of the boiler feed water control method based on an integrated water pump room described in the present invention, wherein: the setting of the feed water plan according to the boiler feed water demand includes: performing a performance evaluation on the current feed water pump, including the efficiency and flow-head characteristics of the pump, storing the performance data in the system and labeling the corresponding pump; designing an optimized combination operation strategy of the pump according to the boiler feed water demand and based on the performance data of each pump, including the configuration of the main pump and the standby pump, setting the operating parameters of the pump, including the opening, minimum operating time and start-stop interval; after starting to pump water, monitoring the operating status of the pump in real time, and automatically adjusting the operating combination of the pump through the control system to meet the feed water flow demand.

[0017] As a preferred scheme of the boiler feed water control method based on an integrated water pump room described in the present invention, wherein: the implementation of the three-impulse control strategy to control the boiler water level includes, analyzing the boiler operation data, determining the relationship between the steam flow, feed water flow and water level, designing a three-impulse control loop, including the collection and processing of steam flow, feed water flow and water level signals; integrating the three-impulse control strategy into the boiler feed water control system, detecting the three-impulse data through the three-impulse control loop, adjusting the parameters according to the demand, so as to control the three impulses to keep the boiler water level to meet the demand and reduce the water level fluctuation.

[0018] As a preferred scheme of the boiler feed water control method based on an integrated water pump room described in the present invention, the real-time monitoring of the water quality and water level in the boiler includes: monitoring the feed water quality through a sensor, comparing the obtained water quality value with a preset threshold value, if it is less than the preset threshold value, the system operates normally, if it is greater than the preset threshold value, a boiler water quality warning is issued; setting the maximum water level threshold and the minimum water level threshold in the boiler, monitoring the boiler water level through a water level controller, and issuing a boiler water level warning when the monitored water level is greater than the maximum water level threshold or less than the minimum water level threshold.

[0019] Another object of the present invention is to provide a boiler water supply control system based on an integrated water pump room. When taking water, this system can determine the water intake location and water intake amount based on water source data and future predicted water consumption, and when supplying water, it can ensure stable water supply based on intelligent control methods.

[0020] To solve the above technical problems, the present invention provides the following technical solutions: a system of a boiler feed water control method based on an integrated water pump room, comprising: a water intake module, a water supply module and a boiler water level control and monitoring module; the water intake module collects water quality detection data, determines the water source according to the detection results, and determines the water intake amount based on a water source supply prediction system; the water supply module pre-treats the raw water obtained, stores the raw water in a storage tank, sets a water supply plan according to the boiler feed water demand, and the integrated water pump room pumps the raw water in the storage tank into the boiler, and adjusts the water flow in real time when pumping water; the boiler water level control and monitoring module implements a three-impulse control strategy to control the boiler water level, and monitors the water quality and water level in the boiler in real time. If there is an abnormality, a fault warning is issued.

[0021] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the boiler feed water control method based on an integrated water pump room as described above are implemented.

[0022] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a boiler feed water control method based on an integrated water pump room as described above.

[0023] The beneficial effects of the present invention are as follows: in the existing boiler water supply scheme, there are water source pollution risks and unstable water volume during the raw water collection process. The present invention determines the optimal water source by configuring a water quality detection system. If the water source cannot be changed, the pretreatment settings can be changed in advance to ensure water quality requirements. Based on historical water source supply data, combined with weather forecasts and seasonal change models, a water source supply prediction system is established. If it is predicted that the water supply will be insufficient in the future, water can be taken in advance to ensure stable water supply.

[0024] Furthermore, due to improper control strategies, traditional feedwater pumps may start and stop frequently, shortening the service life of the pumps. In addition, due to inaccurate feedwater regulation, the boiler water level may fluctuate greatly, affecting the safe operation of the boiler. The present invention reduces the number of pump starts and stops, reduces the energy consumption of the pump, and improves the overall energy efficiency of the system by implementing the optimized combined operation strategy of the pump and variable frequency speed regulation technology. The three-impulse control strategy is adopted, combined with steam flow, feedwater flow and water level signals, which effectively reduces water level fluctuations, improves the stability of the boiler water level, and ensures the safe operation of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0026] Figure 1 This is a flow chart of a boiler feed water control method based on an integrated water pump room in Example 1.

[0027] Figure 2 This is a module structure diagram of a boiler feed water control system based on an integrated water pump room in Example 1. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Example 1, reference Figure 1 , which is the first embodiment of the present invention, and which provides a boiler feed water control method based on an integrated water pump room, including: Figure 1 As shown:

[0031] S1. Collect water quality test data, determine the water source based on the test results, and determine the water intake based on the water supply prediction system.

[0032] A water quality testing system is installed at the raw water collection point to test the water source. The system should include the following testing devices: COD (chemical oxygen demand) analyzer: used to detect the organic matter content in the water. TOC (total organic carbon) analyzer: used to evaluate the total amount of organic carbon in the water. TSS (total suspended solids) sensor: used to measure the suspended solids content in the water. Heavy metal ion detector: used to detect the concentration of heavy metal ions in the water. Microbial detector: used to monitor the number of bacteria and pathogens in the water.

[0033] The detected parameters are weighted to obtain a water quality value, which is then compared with a preset threshold. If the value is less than the preset threshold, the system is operating normally; if the value is greater than the preset threshold, the water source is judged to be polluted.

[0034] When it is determined that the water source is polluted, if there is a backup water source, it will automatically switch to the backup water source and start the backup water source collection system.

[0035] If there is no backup water source, the pollution alarm and water quality data will be uploaded to the central control system, and the pretreatment system will be adjusted to emergency mode to enhance the water quality treatment effect.

[0036] Determining the water intake based on the water supply prediction system specifically includes using historical water supply data, combining weather forecasts and seasonal change models to establish a water supply prediction system. The seasonal change model is trained based on historical seasonal precipitation change data.

[0037] According to the future water supply output of the forecast system, formulate corresponding water intake strategies including:

[0038] If water supply is forecast to be sufficient, routine water extraction operations will be maintained.

[0039] If the water supply is predicted to be insufficient, the excess water intake procedure will be initiated to increase the water intake and store the excess water in the regulating tank. The control system in the integrated pump room will adjust the operating status of the water pump in real time according to the water level in the tank to ensure the water intake, storage and supply process.

[0040] S2. Pre-treat the raw water and store it in a storage tank. Set the water supply plan according to the boiler water supply demand. The integrated water pump room pumps the raw water in the storage tank into the boiler and adjusts the water flow in real time during pumping.

[0041] The pretreatment of the raw water includes the following steps: removing large solid particles from the raw water by alternating coarse and fine screens at the water intake; settling and separating suspended matter in the raw water by sedimentation tanks and clarification tanks; softening the raw water and removing impurities by ion exchange and reverse osmosis; and finally storing the raw water in a storage tank through a filter screen.

[0042] Setting the feedwater plan according to the boiler feedwater demand specifically includes evaluating the performance of the current feedwater pump, including the pump's efficiency and flow-head characteristics, storing the performance data in the system and labeling the corresponding pump.

[0043] According to the boiler feed water demand and based on the performance data of each pump, the optimal combination operation strategy of the pumps is designed, including the configuration of the main pump and the standby pump, and the operating parameters of the pumps are set, including the opening, minimum operating time and start-stop interval. A variable frequency speed control device is installed to achieve precise control of the feed water pump speed.

[0044] After starting to pump water, the operating status of the pump is monitored in real time, and the operating combination of the pump is automatically adjusted through the control system to meet the water supply flow demand.

[0045] S3. Implement the three-impulse control strategy to control the boiler water level and monitor the water quality and water level in the boiler in real time. If there is any abnormality, a fault warning will be issued.

[0046] Analyze boiler operation data, determine the relationship between steam flow, feed water flow and water level, and design a three-impulse control loop, including the collection and processing of steam flow, feed water flow and water level signals.

[0047] The three-impulse control strategy is integrated into the boiler feed water control system. The three-impulse data is detected through the three-impulse control loop, and the parameters are adjusted according to demand to control the three impulses to keep the boiler water level to meet the demand and reduce water level fluctuations.

[0048] The feed water quality is monitored by sensors, and the obtained water quality value is compared with the preset threshold. If it is less than the preset threshold, the system operates normally. If it is greater than the preset threshold, a boiler water quality warning is issued.

[0049] Set the maximum water level threshold and the minimum water level threshold in the boiler, monitor the boiler water level through the water level controller, and issue a boiler water level warning when the monitored water level is greater than the maximum water level threshold or less than the minimum water level threshold.

[0050] Example 2, reference Figure 2 , which is the second embodiment of the present invention, and is different from the first embodiment in that: a system of a boiler feed water control method based on an integrated water pump room, comprising a water intake module 100, a water supply module 200 and a boiler water level control and monitoring module 300; the water intake module 100 collects water quality detection data, determines the water source according to the detection result, and determines the water intake amount based on the water source supply prediction system; the water supply module 200 pre-treats the raw water obtained, stores the raw water in a storage tank, sets a water supply plan according to the boiler feed water demand, and the integrated water pump room pumps the raw water in the storage tank into the boiler, and adjusts the water flow in real time when pumping water; the boiler water level control and monitoring module 300 implements a three-impulse control strategy to control the boiler water level, and monitors the water quality and water level in the boiler in real time. If there is an abnormality, a fault warning is issued.

[0051] If the functions are implemented in the form of 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 the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0052] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0053] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0054] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A boiler feed water control method based on an integrated water pump room, characterized in that: include, Collect water quality test data, determine the water source based on the test results, and determine the water intake based on the water supply forecast system; Pre-treat the raw water and store it in a storage tank. Set a water supply plan based on the boiler water supply demand. The integrated water pump room pumps the raw water in the storage tank into the boiler and adjusts the water flow in real time during the pumping process. The three-impulse control strategy is implemented to control the boiler water level, and the water quality and water level in the boiler are monitored in real time. If there is any abnormality, a fault warning will be issued.

2. A boiler feed water control method based on an integrated water pump room as claimed in claim 1, characterized in that: Determining the water source based on the test results includes installing a water quality testing system at the raw water collection point to test the water source, and the collected water quality test data includes the organic matter content in the water, the total organic carbon content in the water, the suspended solid content in the water, the heavy metal ion concentration in the water, and the number of bacteria and pathogens in the water; The detected parameters are weighted to obtain a water quality value, which is then compared with a preset threshold. If the value is less than the preset threshold, the system is operating normally; if the value is greater than the preset threshold, the water source is judged to be polluted. When it is determined that the water source is polluted, if there is a backup water source, it will automatically switch to the backup water source and start the backup water source collection system; If there is no backup water source, the pollution alarm and water quality data will be uploaded to the central control system, and the pretreatment system will be adjusted to emergency mode to enhance the water quality treatment effect.

3. A boiler feed water control method based on an integrated water pump room as claimed in claim 2, characterized in that: Determining the water intake based on the water supply forecasting system includes establishing a water supply forecasting system using historical water supply data in combination with weather forecasts and seasonal variation models, wherein the seasonal variation model is trained based on historical seasonal precipitation variation data; According to the future water supply output of the forecast system, formulate corresponding water intake strategies including: If the water supply is forecast to be sufficient, maintain routine water extraction operations; If the water supply is predicted to be insufficient, the excess water intake procedure will be initiated to increase the water intake and store the excess water in the regulating tank. The control system in the integrated pump room will adjust the operating status of the water pump in real time according to the water level in the tank to ensure the water intake, storage and supply process.

4. A boiler feed water control method based on an integrated water pump room as claimed in claim 3, characterized in that: The pretreatment of the raw water includes removing large solid particles in the raw water by alternating coarse and fine screens at the water intake, settling and separating suspended matter in the raw water by sedimentation tanks and clarification tanks, softening the raw water and removing impurities by ion exchange and reverse osmosis, and finally storing the raw water in a storage tank by a filter screen.

5. A boiler feed water control method based on an integrated water pump room as claimed in claim 4, characterized in that: The setting of the feedwater scheme according to the boiler feedwater demand includes evaluating the performance of the current feedwater pump, including the efficiency and flow-head characteristics of the pump, storing the performance data in the system and labeling the corresponding pump; According to the boiler feed water demand and based on the performance data of each pump, the optimal combination operation strategy of the pumps is designed, including the configuration of the main pump and the standby pump, and the operation parameters of the pumps are set, including the opening degree, minimum operation time and start-stop interval; After starting to pump water, the operating status of the pump is monitored in real time, and the operating combination of the pump is automatically adjusted through the control system to meet the water supply flow demand.

6. A boiler feed water control method based on an integrated water pump room as claimed in claim 5, characterized in that: The implementation of the three-impulse control strategy to control the boiler water level includes analyzing boiler operation data, determining the relationship between steam flow, feed water flow and water level, and designing a three-impulse control loop, including the collection and processing of steam flow, feed water flow and water level signals; The three-impulse control strategy is integrated into the boiler feed water control system. The three-impulse data is detected through the three-impulse control loop, and the parameters are adjusted according to demand to control the three impulses to keep the boiler water level to meet the demand and reduce water level fluctuations.

7. A boiler feed water control method based on an integrated water pump room as claimed in claim 6, characterized in that: The real-time monitoring of the water quality and water level in the boiler includes monitoring the feed water quality through a sensor, comparing the obtained water quality value with a preset threshold value, if it is less than the preset threshold value, the system operates normally, and if it is greater than the preset threshold value, a boiler water quality warning is issued; Set the maximum water level threshold and the minimum water level threshold in the boiler, monitor the boiler water level through the water level controller, and issue a boiler water level warning when the monitored water level is greater than the maximum water level threshold or less than the minimum water level threshold.

8. A system using a boiler feed water control method based on an integrated water pump room as claimed in any one of claims 1 to 7, characterized in that: It comprises a water intake module (100), a water supply module (200) and a boiler water level control and monitoring module (300); The water intake module (100) collects water quality test data, determines the water source according to the test results, and determines the water intake amount based on the water source supply amount prediction system; The water supply module (200) pre-processes the raw water obtained, stores the raw water in a storage tank, sets a water supply plan according to the boiler water supply demand, and pumps the raw water in the storage tank into the boiler through the integrated water pump room, and adjusts the water flow in real time during the pumping; The boiler water level control and monitoring module (300) implements a three-impulse control strategy to control the boiler water level, and monitors the water quality and water level in the boiler in real time. If there is an abnormality, a fault warning is issued.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a boiler feed water control method based on an integrated pump room as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a boiler feed water control method based on an integrated pump room as described in any one of claims 1 to 7 are implemented.

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