High-temperature flue gas monitoring and controlling device for thermal control specialty of thermal power plant
By adopting a high-temperature flue gas sampling system and a temperature control system in thermal power plants, the problems of easy damage to high-temperature flue gas monitoring equipment and control system failure have been solved, achieving accuracy and stability in high-temperature flue gas monitoring, reducing maintenance costs, and improving the operating efficiency and safety of power plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU CHINA RESOURCES POWER CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
Existing high-temperature flue gas monitoring equipment in thermal power plants is prone to damage, has low sensor accuracy, and suffers from control system failures, leading to a decline in power generation efficiency and safety.
The system employs a high-temperature flue gas sampling system, a temperature control system, and a main control system, including a tubular probe, a filter, a backflush pipe, and a backflush gas heating port to ensure sampling accuracy and equipment stability.
It improves the accuracy and stability of high-temperature flue gas monitoring, reduces maintenance costs, and enhances the operational efficiency and safety of thermal power plants.
Smart Images
Figure CN224202830U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of thermal control technology for thermal power plants, and in particular to a high-temperature flue gas monitoring and control device for thermal control in thermal power plants. Background Technology
[0002] Thermal power plants generate large amounts of high-temperature flue gas during power generation. This high temperature and strong corrosiveness pose significant challenges to monitoring equipment. Existing technologies suffer from issues such as easily damaged mechanical components in sampling pumps, susceptibility to crystal formation in gas ejectors leading to malfunctions, and sensor problems including zero-point drift, inconvenient calibration, and low accuracy. Furthermore, long-term operation of thermal control devices is prone to overheating, large temperature control deviations, sensor malfunctions, and control system failures, impacting power generation efficiency and safety. Utility Model Content
[0003] This application provides a high-temperature flue gas monitoring and control device for thermal control in thermal power plants, which improves the accuracy, stability and safety of high-temperature flue gas monitoring, reduces maintenance costs, and improves the operating efficiency of thermal power plants.
[0004] This application provides a high-temperature flue gas monitoring and control device for thermal control systems in thermal power plants, comprising: a high-temperature flue gas sampling system, a temperature control system, and a main control system, wherein...
[0005] The high-temperature flue gas sampling system includes a tubular probe and a filter.
[0006] The filter is located at one end of the tubular probe and is used to sample high-temperature flue gas;
[0007] The other end of the tubular probe is equipped with a backflush air pipe to prevent particulate matter from clogging it.
[0008] The backflush pipe is equipped with a backflush heating through hole to ensure stable backflush temperature.
[0009] In the above technical solution, by setting up a high-temperature flue gas sampling system, a temperature control system, and a main control system, the high-temperature flue gas sampling system includes a tubular probe and a filter. The filter is located at one end of the tubular probe for sampling high-temperature flue gas. The other end of the tubular probe is equipped with a backflush pipe to prevent particulate matter blockage. The backflush pipe is equipped with a backflush gas heating through-hole to ensure stable backflush gas temperature. This improves the accuracy, stability, and equipment safety of high-temperature flue gas monitoring, reduces maintenance costs, and enhances the operating efficiency of thermal power plants.
[0010] In one specific implementation scheme, the temperature control system includes a first heating mechanism, wherein...
[0011] The first heating mechanism is connected to the tubular probe and is used to heat the sampled high-temperature flue gas.
[0012] In one specific implementation scheme, the temperature control system includes a second temperature control mechanism, wherein...
[0013] The second temperature control mechanism is positioned corresponding to the backflush gas heating through-hole to ensure stable backflush gas temperature.
[0014] In one specific implementation scheme, a backflush solenoid valve is provided on the backflush air pipe.
[0015] In one specific implementation scheme, a first pressure regulating valve is provided on the backflush pipe.
[0016] In one specific implementation scheme, a sampling solenoid valve is provided on the connecting pipeline between the first heating mechanism and the tubular probe.
[0017] In one specific implementation scheme, a second pressure regulating valve is provided on the connecting pipeline between the first heating mechanism and the tubular probe.
[0018] In one possible implementation, the first heating mechanism includes a first heating wire.
[0019] In one possible implementation, the second temperature control mechanism includes a second heating wire and a temperature sensor.
[0020] In one possible implementation, the second heating wire is disposed on the backflush pipe;
[0021] The temperature sensor is located inside the backflush pipe. Attached Figure Description
[0022] Figure 1 A schematic diagram of the structure of a high-temperature flue gas monitoring and control device for thermal control in a thermal power plant, provided in an embodiment of this application;
[0023] Figure 2 An electrical block diagram of a high-temperature flue gas monitoring and control device for thermal control in thermal power plants, provided in an embodiment of this application.
[0024] Among them, 1-probe rod, 2-filter, 3-backflush air pipe, 4-backflush air heating through hole, 5-first pressure regulating valve, 6-second pressure regulating valve, 7-sampling solenoid valve, 8-backflush solenoid valve, 9-first heating mechanism, and 10-second temperature control mechanism. Detailed Implementation
[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.
[0026] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.
[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0028] To facilitate understanding of the high-temperature flue gas monitoring and control device for thermal control in thermal power plants provided in this application embodiment, its application scenario will be explained first. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants provided in this application embodiment aims to improve the accuracy, stability, and equipment safety of high-temperature flue gas monitoring, reduce maintenance costs, and improve the operating efficiency of thermal power plants. Thermal power plants generate a large amount of high-temperature flue gas during power generation. This high temperature and strong corrosiveness pose a severe challenge to monitoring equipment. In existing technologies, sampling pumps are prone to mechanical component damage, gas ejectors are prone to crystal formation leading to malfunctions, and sensors suffer from zero-point drift, inconvenient calibration, and low accuracy. Furthermore, long-term operation of thermal control devices is prone to overheating, large temperature control deviations, sensor malfunctions, and control system failures, affecting power generation efficiency and safety. Therefore, this application embodiment provides a high-temperature flue gas monitoring and control device for thermal control in thermal power plants to improve the accuracy, stability, and equipment safety of high-temperature flue gas monitoring, reduce maintenance costs, and improve the operating efficiency of thermal power plants. The following detailed description, in conjunction with specific accompanying drawings, illustrates the device in detail.
[0029] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a high-temperature flue gas monitoring and control device for thermal control in a thermal power plant, provided in an embodiment of this application; Figure 2 An electrical block diagram of a high-temperature flue gas monitoring and control device for thermal control in thermal power plants, provided in an embodiment of this application.
[0030] exist Figure 1 and Figure 2 This application provides a high-temperature flue gas monitoring and control device for thermal control in thermal power plants, comprising: a high-temperature flue gas sampling system, a temperature control system, and a main control system, wherein...
[0031] The high-temperature flue gas sampling system includes a tubular probe 1 and a filter 2.
[0032] The filter is located at one end of the tubular probe and is used to sample high-temperature flue gas;
[0033] The other end of the tubular probe is equipped with a backflush pipe 3 to prevent particulate matter from clogging it.
[0034] The backflush pipe is provided with a backflush heating through hole 4 to ensure the backflush temperature is stable.
[0035] In the above technical solution, by setting up a high-temperature flue gas sampling system, a temperature control system, and a main control system, the high-temperature flue gas sampling system includes a tubular probe and a filter. The filter is located at one end of the tubular probe for sampling high-temperature flue gas. The other end of the tubular probe is equipped with a backflush pipe to prevent particulate matter blockage. The backflush pipe is equipped with a backflush gas heating through-hole to ensure stable backflush gas temperature. This improves the accuracy, stability, and equipment safety of high-temperature flue gas monitoring, reduces maintenance costs, and enhances the operating efficiency of thermal power plants.
[0036] Specifically, the beneficial effects of the high-temperature flue gas monitoring and control device for thermal control in thermal power plants include:
[0037] Improve the accuracy of high-temperature flue gas monitoring
[0038] Precise sampling ensures data quality: The tubular probe and filter in the high-temperature flue gas sampling system are rationally designed. The tubular probe penetrates deep into the high-temperature flue gas environment, allowing direct contact with the flue gas and ensuring the representativeness of the sample. The filter, located at one end of the tubular probe, effectively filters out large particulate impurities in the flue gas, allowing only qualified high-temperature flue gas to enter subsequent monitoring stages. This process avoids interference from impurities with the monitoring equipment, enabling the collected flue gas samples to accurately reflect the composition and state of the flue gas, thereby improving the accuracy of monitoring data and providing a reliable basis for subsequent combustion adjustments and emission control.
[0039] Stable backflush gas enhances monitoring stability: The backflush gas pipe and its heating port at the other end of the tubular probe play a crucial role in maintaining the stable operation of the sampling system. In high-temperature flue gas environments, particulate matter easily accumulates inside the tubular probe, leading to blockage of the sampling channel and affecting sampling results. The backflush gas pipe, by periodically introducing backflush gas into the tubular probe, effectively removes accumulated particulate matter and prevents blockage. Meanwhile, the heating port ensures stable backflush gas temperature, avoiding the impact of temperature changes on the flue gas sample, further improving the stability and accuracy of monitoring.
[0040] Enhance equipment operational stability
[0041] Preventing clogging and extending equipment life: The backflush pipe significantly reduces the risk of tubular probe clogging. In the high-temperature flue gas environment of thermal power plants, the particulate matter content is high. Without effective anti-clogging measures, tubular probes are easily blocked, causing the sampling system to malfunction and potentially damaging the monitoring equipment. The backflush pipe, through regular backflushing, promptly removes particulate matter from the tubular probe, ensuring unobstructed sampling channels, extending the service life of the tubular probe and the entire sampling system, reducing the probability of equipment failure, and improving operational stability.
[0042] The temperature control system ensures reliability: Working in conjunction with the high-temperature flue gas sampling system, the temperature control system can monitor and adjust the temperature during the sampling process in real time. High-temperature flue gas has a high temperature and fluctuates significantly; improper temperature control can not only affect the performance and lifespan of the monitoring equipment but also lead to inaccurate measurement results. The temperature control system automatically adjusts the temperature of the backflushing gas and other relevant parameters based on the actual flue gas temperature, ensuring the sampling system operates within a suitable temperature range and improving the reliability and stability of the entire monitoring and control device.
[0043] Improve equipment safety
[0044] Reducing Safety Hazards: During high-temperature flue gas monitoring, equipment malfunctions or abnormalities can lead to safety accidents. For example, blockage of the tubular probe can cause increased flue gas pressure, potentially leading to pipe rupture and other hazards. This device effectively reduces the risk of equipment failure and minimizes safety hazards through its anti-blockage design of the backflush pipe and precise temperature control system. Furthermore, the stainless steel tubular probe possesses excellent high-temperature and corrosion resistance, enabling stable operation in harsh high-temperature flue gas environments, further enhancing equipment safety.
[0045] Ensuring personnel safety: Accurate and reliable monitoring data helps operators at thermal power plants understand the state of high-temperature flue gas in a timely manner and take corresponding measures for adjustment and control. For example, when the content of harmful substances in the flue gas is detected to exceed the standard, operators can adjust combustion parameters in a timely manner to reduce the emission of harmful substances, ensure the safety of the working environment, and protect the health of operators.
[0046] Reduce maintenance costs
[0047] Reduced equipment maintenance frequency: Thanks to its effective anti-clogging design and temperature control measures, the equipment failure rate is significantly reduced, decreasing the frequency and number of maintenance tasks. This not only saves on the manpower, material resources, and time costs associated with maintenance but also avoids production losses due to equipment downtime, thus improving the economic efficiency of thermal power plants.
[0048] Extended equipment replacement cycles: Extended lifespan of key components such as tubular probes and filters means extended equipment replacement cycles. This allows companies to reduce investment in new equipment and lower replacement costs. Simultaneously, stable equipment operation helps reduce the need for spare parts reserves, further optimizing cost management.
[0049] Improve the operating efficiency of thermal power plants
[0050] Optimized Combustion Adjustment: Accurate high-temperature flue gas monitoring data provides strong support for combustion adjustment in thermal power plants. Operators can precisely adjust combustion parameters such as fuel supply and air-fuel ratio based on monitored flue gas composition and temperature, thereby optimizing the combustion process. This not only improves fuel combustion efficiency and reduces energy consumption but also reduces pollutant emissions, achieving the goals of energy conservation and emission reduction.
[0051] Improving power generation efficiency: By optimizing combustion adjustments, the boiler thermal efficiency of thermal power plants is improved, leading to increased power generation efficiency. While ensuring safe and stable operation, this increases the power plant's generating capacity, creating greater economic benefits for the enterprise. Simultaneously, reducing pollutant emissions helps enterprises meet environmental protection requirements, avoid penalties for environmental issues, and enhance their social image and market competitiveness.
[0052] In one specific implementation scheme, the temperature control system includes a first heating mechanism 9, wherein...
[0053] The first heating mechanism is connected to the tubular probe and is used to heat the sampled high-temperature flue gas.
[0054] Specifically, the beneficial effects include: the first heating mechanism is connected to the tubular probe, which can directly heat the sampled high-temperature flue gas, ensuring that the flue gas temperature remains stable during transmission and avoiding the impact of temperature changes on the accuracy of measurement data. At the same time, a stable temperature environment can prevent certain components in the flue gas from undergoing physical or chemical changes due to temperature fluctuations, ensuring the reliability of monitoring results and providing a precise basis for subsequent thermal control adjustments.
[0055] In one specific implementation scheme, the temperature control system includes a second temperature control mechanism 10, wherein,
[0056] The second temperature control mechanism is positioned corresponding to the backflush gas heating through-hole to ensure stable backflush gas temperature.
[0057] Specifically, the beneficial effects include: precise control of the backflush gas temperature, ensuring its stability and preventing temperature fluctuations from affecting the backflush effect; and effectively preventing particulate matter from accumulating and clogging the tubular probe. A stable backflush gas temperature also reduces interference with the high-temperature flue gas sampling process, ensuring accurate monitoring data, improving the reliability and stability of the entire high-temperature flue gas monitoring and control device, and reducing equipment maintenance costs.
[0058] In one specific implementation scheme, a backflush solenoid valve 8 is provided on the backflush air pipe.
[0059] Specifically, the beneficial effects include: precise control over the on / off state and flow rate of backflush air, enabling backflush operation to be initiated as needed, timely removal of particulate matter inside the tubular probe to prevent blockage, and ensuring smooth sampling. The backflush frequency and intensity can also be flexibly adjusted according to actual conditions to optimize the anti-clogging effect. Simultaneously, the solenoid valve's rapid response and precise control enhance the automation level of the device, reduce manual intervention, and improve monitoring and control efficiency.
[0060] In one specific implementation scheme, a first pressure regulating valve 5 is provided on the backflush pipe.
[0061] Specifically, the beneficial effects include: precise adjustment of the backflushing gas pressure, stabilizing it within a suitable range based on the degree of particulate matter accumulation inside the tubular probe and actual operating conditions. Moderate pressure effectively purges particulate matter and prevents blockage, without damaging equipment components due to excessive pressure. It also ensures stable backflushing performance, improves the reliability of the high-temperature flue gas sampling system, and guarantees the smooth operation of monitoring work.
[0062] In one specific implementation scheme, a sampling solenoid valve 7 is provided on the connecting pipeline between the first heating mechanism and the tubular probe.
[0063] Specifically, the beneficial effects include: flexible control over the flow of high-temperature flue gas from the tubular probe to the first heating mechanism, enabling the sampling process to be started or stopped as needed, avoiding unnecessary energy consumption. It also allows for precise timing of sampling, ensuring accurate sampling under suitable operating conditions, guaranteeing the representativeness of flue gas samples entering the heating mechanism and subsequent monitoring stages, and improving the accuracy and stability of the entire high-temperature flue gas monitoring system.
[0064] In one specific implementation scheme, a second pressure regulating valve 6 is provided on the connecting pipeline between the first heating mechanism and the tubular probe.
[0065] Specifically, the beneficial effects include: the ability to precisely regulate the pressure of the high-temperature flue gas entering the first heating mechanism, stabilizing it within a suitable range. Appropriate pressure ensures that the flue gas passes through the heating mechanism uniformly and stably, improving heating efficiency and guaranteeing stable flue gas temperature. Simultaneously, a stable pressure environment prevents pressure fluctuations from impacting subsequent monitoring equipment, extending equipment lifespan and improving the reliability and stability of the entire monitoring system.
[0066] In one possible implementation, the first heating mechanism includes a first heating wire.
[0067] Specifically, the beneficial effects include: rapid heating response, quickly increasing the temperature of incoming high-temperature flue gas and ensuring temperature stability. Furthermore, the heating wire allows for precise temperature control by adjusting the heating power through accurate current control, meeting diverse monitoring needs. In addition, its relatively simple structure facilitates installation and maintenance, resulting in lower costs and contributing to reduced manufacturing costs and operational complexity of the entire high-temperature flue gas monitoring and control device.
[0068] In one possible implementation, the second temperature control mechanism includes a second heating wire and a temperature sensor.
[0069] Specifically, the beneficial effects include: the second heating wire can heat the backflush gas as needed, and the temperature sensor can accurately monitor the backflush gas temperature in real time. The combination of these two allows for rapid adjustment of the heating wire power based on actual temperature conditions, precisely ensuring a stable backflush gas temperature. A stable backflush gas temperature optimizes the backflush effect, prevents blockage of the tubular probe, ensures accurate monitoring of high-temperature flue gas, and improves the reliability and stability of the entire device.
[0070] In one possible implementation, the second heating wire is disposed on the backflush pipe;
[0071] The temperature sensor is located inside the backflush pipe.
[0072] Specifically, the beneficial effects include: the second heating wire acts directly on the backflush pipe, efficiently transferring heat to the backflush gas for rapid heating. A temperature sensor placed inside the pipe allows for precise real-time monitoring of the actual backflush gas temperature, providing feedback to the control system for timely adjustment of the heating wire power. The combined effect of these two components precisely stabilizes the backflush gas temperature, ensuring effective backflushing, preventing probe blockage, and improving the accuracy of high-temperature flue gas monitoring.
[0073] Specifically, the overall control system controls the heating mechanism, solenoid valves, and other equipment to achieve automatic temperature adjustment and sampling control;
[0074] The probe is a tubular object located inside the high-temperature flue. A filter is installed at the left end, and a backflush pipe is installed inside to prevent particulate matter from clogging it.
[0075] The first heating mechanism ensures a stable temperature of the sampled gas through heating.
[0076] The second temperature control mechanism controls the temperature of the backflush air to prevent condensation.
[0077] The specific structure and control methods of the overall control system and temperature control system are well-known technologies and will not be elaborated here.
[0078] Those skilled in the art will know that this application can be implemented as a system, method, or computer program product.
[0079] Therefore, this disclosure can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this application can also be implemented as a computer program product in one or more computer-readable media, which contains computer-readable program code.
[0080] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.
[0081] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application. Based on this, various substitutions and improvements can be made to this application, all of which fall within the protection scope of this application.
Claims
1. A high-temperature flue gas monitoring and control device for thermal control in thermal power plants, characterized in that, include: High-temperature flue gas sampling system, temperature control system, and main control system, among which, The high-temperature flue gas sampling system includes a tubular probe and a filter. The filter is located at one end of the tubular probe and is used to sample high-temperature flue gas; The other end of the tubular probe is equipped with a backflush air pipe to prevent particulate matter from clogging it. The backflush pipe is equipped with a backflush heating through hole to ensure stable backflush temperature.
2. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 1, characterized in that, The temperature control system includes a first heating mechanism, wherein... The first heating mechanism is connected to the tubular probe and is used to heat the sampled high-temperature flue gas.
3. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 2, characterized in that, The temperature control system includes a second temperature control mechanism, wherein... The second temperature control mechanism is positioned corresponding to the backflush gas heating through-hole to ensure stable backflush gas temperature.
4. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 3, characterized in that, The backflush air pipe is equipped with a backflush solenoid valve.
5. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 4, characterized in that, The backflush pipe is equipped with a first pressure regulating valve.
6. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 5, characterized in that, A sampling solenoid valve is installed on the connecting pipeline between the first heating mechanism and the tubular probe.
7. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 6, characterized in that, A second pressure regulating valve is provided on the connecting pipeline between the first heating mechanism and the tubular probe.
8. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 7, characterized in that, The first heating mechanism includes a first heating wire.
9. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 8, characterized in that, The second temperature control mechanism includes a second heating wire and a temperature sensor.
10. The high-temperature flue gas monitoring and control device for thermal control in thermal power plants according to claim 9, characterized in that, The second heating wire is disposed on the backflush pipe; The temperature sensor is located inside the backflush pipe.