Hearth negative pressure protection method, system, equipment and medium

Abstract

The invention relates to a hearth negative pressure protection method, system, equipment and medium, and the method comprises the steps: respectively arranging pressure transmitters at two sides of a boiler to continuously collect negative pressure data in a hearth, and when one or more pressure transmitters at any side fail, starting the pressure transmitters to continuously collect negative pressure data in the hearth; utilizing a preset logic switching mode to determine an effective measuring point used for collecting negative pressure data; when the pressure values of the pressure transmitters on the two sides of the boiler reach preset protection constant values, the system judges that the negative pressure state in the hearth is abnormal; and if the duration of the abnormal state exceeds a preset time period, triggering a protection action. According to the invention, precise monitoring and stable control of the negative pressure of the hearth are realized, the reliability and accuracy of the protection system are obviously improved, maloperation or refusal operation caused by local pressure fluctuation or single-point fault is effectively prevented, and safe operation of the boiler is ensured. The problem that in the related technology, misoperation exists when a pressure switch is adopted for monitoring hearth negative pressure, and consequently hearth negative pressure protection reliability is low is solved.

Description

Technical Field

[0001] This application relates to the technical field of negative pressure protection, and particularly to a furnace negative pressure protection method, system, device, and medium. Background Art

[0002] In thermal power generation enterprises, furnace pressure protection is a key component of the boiler safety protection system and is crucial for ensuring the safe operation of the power plant. Its main function is to prevent "implosion" or "explosion" accidents caused by abnormal fluctuations in the furnace pressure. "Explosion" refers to the structural damage caused by excessive positive pressure in the furnace, exceeding the maximum stress that the water-cooled wall or flue gas duct structure can withstand; "implosion" refers to the compression and damage of the furnace or flue gas duct by the external atmospheric pressure due to excessive negative pressure in the furnace.

[0003] Currently, pressure switches are commonly used in thermal power generation units to monitor the negative pressure level in the furnace. However, using pressure switches to monitor the furnace negative pressure has the problem of false tripping, resulting in low reliability of the furnace negative pressure protection. Summary of the Invention

[0004] Embodiments of this application provide a furnace negative pressure protection method, system, device, and medium to at least solve the problem of false tripping when using a pressure switch to monitor the furnace negative pressure in related technologies, resulting in low reliability of the furnace negative pressure protection.

[0005] In a first aspect, embodiments of this application provide a furnace negative pressure protection method, and the method includes:

[0006] Pressure transmitters are respectively arranged on both sides of the boiler to continuously collect negative pressure data in the furnace;

[0007] When one or more of the pressure transmitters fail on either side, the pressure transmitter for collecting the negative pressure data is determined through a preset logic switching method;

[0008] When the pressure values of the pressure transmitters on both sides of the boiler reach a preset protection set value, it is determined that the negative pressure data in the furnace is in an abnormal state;

[0009] When the duration of the negative pressure data being in an abnormal state is greater than a preset time period, a protection action is triggered.

[0010] In an embodiment, the installation positions of the pressure transmitters include:

[0011] At least three positions at the same height inside the furnace on one side;

[0012] At least three positions at the same height inside the furnace on the other side.

[0013] In an embodiment, the preset logic switching method includes:

[0014] When a pressure transmitter fails on either side, a one-out-of-two logic is adopted to select the pressure value of any one of the two normally operating pressure transmitters as the judgment basis;

[0015] When two pressure transmitters fail on either side, a one-out-of-one logic is adopted to select the pressure value of a normally operating pressure transmitter as the judgment basis.

[0016] In one embodiment, the preset time period is set to be between 0.5 second and 5 seconds.

[0017] In one embodiment, when the time period during which the negative pressure data remains in an abnormal state is greater than the preset time period and after a protection action is triggered, the method further includes:

[0018] Setting up a visual data display interface to view the status of each of the pressure transmitters in real time;

[0019] When the process measurement deviation is greater than the preset threshold and / or the pressure transmitter fails, an alarm is issued.

[0020] In one embodiment, the issuing of the alarm includes:

[0021] Setting up a hierarchical alarm threshold, and warning messages and alarm messages of different levels are respectively issued for pressure values of different degrees.

[0022] In one embodiment, the method further includes: when all pressure transformers on either side fail, triggering an emergency protection program and taking a shutdown measure.

[0023] In a second aspect, an embodiment of the present application provides a furnace negative pressure protection system, which includes a pressure transmitter setting module, a preset logic switching mode module, an abnormal state determination module, and a protection action triggering module, wherein:

[0024] The pressure transmitter setting module is used to respectively set pressure transmitters on both sides of the boiler for continuously collecting the negative pressure data in the furnace;

[0025] The preset logic switching mode module is used to determine the pressure transmitter for collecting the negative pressure data through a preset logic switching mode when one or more of the pressure transmitters fail on either side;

[0026] The abnormal state determination module is used to determine that the negative pressure data in the furnace is in an abnormal state when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection setting value;

[0027] The protection action triggering module is used to trigger a protection action when the time period during which the negative pressure data remains in an abnormal state is greater than the preset time period.

[0028] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements a furnace negative pressure protection method as described in the first aspect above.

[0029] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements a furnace negative pressure protection method as described in the first aspect above.

[0030] The furnace negative pressure protection method, system, device, and medium provided by the embodiments of the present application at least have the following technical effects.

[0031] By respectively arranging pressure transmitters on both sides of the boiler to continuously collect the negative pressure data in the furnace, and when a single or multiple pressure transmitters fail on either side, using a preset logic switching method to determine the effective measuring points for collecting negative pressure data; when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection setting value, the system determines that the negative pressure state in the furnace is abnormal; if this abnormal state lasts for more than a preset time period, a protection action is triggered. It realizes the precise monitoring and stable control of the furnace negative pressure, significantly improves the reliability and accuracy of the protection system, effectively prevents misoperation or refusal to operate caused by local pressure fluctuations or single-point failures, ensures the safe operation of the boiler, and reduces the risk of unplanned outages. It solves the problem of misoperation in monitoring the furnace negative pressure using pressure switches in the related art, resulting in low reliability of the furnace negative pressure protection.

[0032] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0034] Figure 1 is a flowchart of a furnace negative pressure protection method according to an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a preset logic switching method shown according to an exemplary embodiment;

[0036] Figure 3 is a block diagram of a furnace negative pressure protection system shown according to an exemplary embodiment

[0037] Figure 4It is a block diagram of an electronic device shown according to an exemplary embodiment. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without making creative efforts belong to the scope of protection of the present application.

[0039] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar scenarios based on these drawings without making creative efforts. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes made based on the technical content disclosed in the present application are only conventional technical means and should not be understood that the content disclosed in the present application is insufficient.

[0040] Referring to "embodiment" in the present application means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0041] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a quantity limitation and may represent a singular or plural number. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The similar words such as "connected", "linked", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and back associated objects. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0042] In a first aspect, an embodiment of the present application provides a furnace negative pressure protection method. Figure 1 It is a flowchart of furnace negative pressure protection, as Figure 1 shown. A furnace negative pressure protection method includes:

[0043] Step S101: Pressure transmitters are respectively arranged on both sides of the boiler to continuously collect the negative pressure data in the furnace.

[0044] Step S102: When one or more pressure transmitters fail on either side, the pressure transmitter determined for collecting the negative pressure data is obtained through a preset logic switching method.

[0045] Step S103: When the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection set value, it is determined that the negative pressure data in the furnace is in an abnormal state.

[0046] Step S104: When the time period during which the negative pressure data remains in an abnormal state is greater than the preset time period, a protection action is triggered.

[0047] It can be understood that the furnace negative pressure protection is to prevent the boiler from imploding or exploding and causing damage to the main boiler equipment.

[0048] In summary, the embodiment of the present application provides a furnace negative pressure protection method. By respectively arranging pressure transmitters on both sides of the boiler to continuously collect the negative pressure data in the furnace, and when a single or multiple pressure transmitters fail on either side, the effective measuring points for collecting the negative pressure data are determined by using a preset logic switching method; when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection set value, the system determines that the negative pressure state in the furnace is abnormal; if this abnormal state lasts for more than the preset time period, a protection action is triggered. It realizes the precise monitoring and stable control of the furnace negative pressure, significantly improves the reliability and accuracy of the protection system, effectively prevents misoperation or refusal to operate caused by local pressure fluctuations or single-point failures, ensures the safe operation of the boiler, and reduces the risk of unplanned outages. It solves the problem of misoperation in the related technology of using pressure switches to monitor the furnace negative pressure, resulting in low reliability of the furnace negative pressure protection.

[0049] In one embodiment, in step S101, pressure transmitters are respectively arranged on both sides of the boiler for continuously collecting the negative pressure data in the furnace.

[0050] Optionally, analog output type pressure transmitters with high precision, stability and reliability are selected to ensure continuous and accurate negative pressure data can be provided. For the installation position, at least three pressure transmitters are installed on both sides (the first side and the second side) of the boiler, and these transmitters are distributed at the same height position. Each pressure transmitter needs to be calibrated to ensure its measurement consistency under different environmental conditions such as temperature and humidity.

[0051] In step S101, using pressure transmitters instead of traditional pressure switches can realize continuous monitoring of the negative pressure change in the furnace, improve the measurement resolution and accuracy, and help detect potential problems earlier. Through the comprehensive evaluation of multi-point data, misoperation caused by single-point failures or local disturbances is effectively prevented, and the reliability and stability of the system are enhanced.

[0052] In one embodiment, in step S102, when a single or multiple pressure transmitters fail on either side, the pressure transmitter for collecting the negative pressure data is obtained by using a preset logic switching method. Specifically, it includes:

[0053] When one pressure transmitter fails on either side, a two-out-of-one logic is adopted, and the pressure value of any one of the two normally operating pressure transmitters is selected as the judgment basis;

[0054] When two pressure transmitters fail on either side, a one-out-of-one logic is adopted, and the pressure value of one normally operating pressure transmitter is selected as the judgment basis.

[0055] Optionally, Figure 2 is a schematic diagram of the preset logic switching method shown according to an exemplary embodiment, as Figure 2As shown, first, continuously monitor the status of each pressure transmitter, including the quality of its output signal (such as whether it exceeds the reasonable range, whether there are abnormal fluctuations, etc.) and the communication connection. If it is detected that the output data of a certain transmitter does not meet the expectation or the communication is interrupted, it is determined that the transmitter has failed.

[0056] The failure of the transmitter is generally calculated based on the measured values. For example, firstly, on one side there are three measuring points, and if one measuring point has a large deviation from the other two, it is considered that the quality of this measuring point is bad, and the deviation range can be preset according to the actual operating conditions; secondly, on one side there are three measuring points, and if one measuring point remains unchanged while the other two change normally, it is considered that the quality of the unchanged measuring point is bad, indicating that the transmitter is faulty or the sampling is blocked, and the measurement at that time is inaccurate; thirdly, on one side there are three measuring points, and if one measuring point exceeds the measurement range while the other two change normally, it is considered that the quality of the measuring point that exceeds the measurement range is bad and the transmitter has failed. By calculating the pressure points of the transmitter displayed in real time on the screen, a conclusion can be drawn as to whether the corresponding quality is normal.

[0057] Subsequently, when it is detected that one of the three pressure transmitters on a certain side fails, automatically switch to the one-out-of-two logic, that is, select the pressure value of any one of the remaining two normally working pressure transmitters as the judgment basis for the current side. This ensures that even if there is a single fault point, the system can still make accurate judgments based on at least two independent data sources. Through this logic switch, reliable negative pressure monitoring can continue without affecting the overall performance, avoiding misoperation or refusal to operate caused by a single equipment failure.

[0058] Immediately afterwards, when it is detected that two of the three pressure transmitters on a certain side fail, automatically switch to the one-out-of-one mode, that is, rely only on the data of the last normally working pressure transmitter for judgment. At the same time, the system will issue an alarm to notify the operator to immediately check and repair the faulty transmitter to restore the redundancy of the system. In this case, the redundancy of the system is reduced, but by retaining one normally working transmitter, the basic monitoring function can still be maintained to prevent the complete loss of control of the furnace negative pressure due to multiple point failures. It can be understood that when none of the three pressure transmitters on the left and right sides fail, the two-out-of-three logic is adopted to determine the pressure transmitter for collecting negative pressure data. That is, two pressure transmitters are selected from each of the left and right sides for collecting negative pressure data.

[0059] In one embodiment, step S103, when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection set value, it is determined that the negative pressure data in the furnace is in an abnormal state.

[0060] Optionally, set high protection values (such as the upper limit of positive pressure) and low protection values (such as the lower limit of negative pressure) based on historical operation data analysis and safety standards to ensure timely response when the pressure in the furnace exceeds the safe range. Only when the pressure values collected by the pressure transmitters on both sides of the boiler simultaneously exceed the preset protection values, the negative pressure data in the furnace is determined to be in an abnormal state, avoiding misjudgment caused by unilateral local disturbances. Specifically:

[0061] First, configure high protection values and low protection values, which should be determined based on the design parameters, operation experience, and industry specifications of the boiler to ensure effective protection of the equipment without affecting normal operation. Set reasonable protection values to ensure timely response when the pressure in the furnace exceeds the safe range, so that operators can take preventive measures. In the example of this application, the preset protection values can be ±1200 - 1500 pa. In this implementation, the high protection value can be 1470 pa positive value, and the low protection value can be -1470 pa negative value. By setting the preset protection values, it can be understood that the negative pressure data is all positive or all negative at the same moment.

[0062] Then, continuously receive data from three pressure transmitters on each side of the boiler, read and record the pressure values of all transmitters at fixed time intervals (such as once per second). Perform preliminary processing on the data of each measurement point, including operations such as filtering and noise reduction, to ensure data quality. Compare the processed pressure values with the preset protection values in real time to check whether the pressure value on either side has reached or exceeded the protection value.

[0063] Immediately afterwards, when the pressure value on one side reaches or exceeds the preset protection value, that side will be temporarily marked as potentially abnormal. Further confirm whether the pressure value on the other side has also reached or exceeded the corresponding protection value. Only when the pressure values on both sides reach or exceed the preset protection values, the system will finally determine that the negative pressure data in the furnace is in an abnormal state.

[0064] For example, three pressure transmitter measurement points are arranged on each side of a certain furnace. According to the preset logic switching method in step S102 above, when a fault is detected in a pressure transmitter on one side, any one of the remaining two normal pressure transmitter measurement points on that side is selected. When there is no pressure transmitter fault on the other side, any one of the pressure transmitter measurement points is selected. The data of the normal pressure transmitter measurement points on both sides are determined whether they are greater than or less than the preset protection value through the preset protection value in step S103, and then according to the continuous preset time period in step S104, a protection action is triggered. This solves the problem of false tripping in the related technology when using a pressure switch to monitor the furnace negative pressure, resulting in low reliability of the furnace negative pressure protection. Step S103 determines the abnormal state only when the data of the pressure transmitters on both sides reach the preset protection value. This method effectively avoids misjudgment caused by local pressure fluctuations on one side or faults of individual measurement points. This not only improves the reliability of the system but also reduces unnecessary shutdown times. The bilateral consistency judgment mechanism ensures that the protection action is triggered only when the entire furnace is indeed in an abnormal pressure state, preventing misoperation caused by local pressure changes, thus greatly enhancing the safety of the system, improving the reliability of the operation of the boiler negative pressure protection, preventing both protection refusal and protection misoperation.

[0065] In one embodiment, step S104: When the time period during which the negative pressure data remains in an abnormal state is greater than the preset time period, a protection action is triggered.

[0066] Optionally, according to historical operation data analysis and safety standards, a reasonable delay time period (for example, 0.5 seconds to 5 seconds) is set to filter out short-term pressure fluctuations. Only when the pressure values of the pressure transmitters on both sides reach the preset protection value and the duration of this abnormal state exceeds the preset time period, a protection action will be triggered. Specifically,

[0067] First, configure an appropriate delay time period (for example, 0.5 seconds to 5 seconds), and this time period should be determined based on the pressure fluctuation characteristics under actual working conditions to ensure that it can effectively filter out instantaneous fluctuations and respond in a timely manner when necessary. Set a reasonable alarm threshold to give an early warning of situations approaching the trigger condition so that operators can take preventive measures.

[0068] Subsequently, continuously receive data from three pressure transmitters on each side of the boiler, and read and record the pressure values of all transmitters at fixed time intervals (e.g., once every 100 milliseconds). Perform preliminary processing on the data of each measurement point, including operations such as filtering and denoising, to ensure data quality. Compare the processed pressure values with the preset protection setpoints in real time to check whether the pressure value on either side has reached or exceeded the protection setpoint. When the pressure values on both sides have reached or exceeded the preset protection setpoint, start a timer to calculate the duration of the abnormal state. If the abnormal state recovers within the preset time period, reset the timer and do not trigger the protection action; if the abnormal state lasts longer than the preset time period, confirm it as a real abnormal situation and prepare to trigger the protection action.

[0069] Finally, once it is confirmed that the abnormal state has lasted longer than the preset time period, immediately execute the predetermined protection actions, such as issuing an alarm, adjusting combustion parameters, shutting down the machine, etc., to prevent further safety risks. And record a detailed event log, including the occurrence time, duration, and protection measures taken for the abnormal state, for subsequent analysis and improvement.

[0070] Step S104 can effectively filter out short-term abnormalities caused by instantaneous pressure fluctuations in the furnace by introducing a delay mechanism, avoid unnecessary protection actions, and thus improve the stability and reliability of the system. It reduces the number of unplanned outages caused by misoperation and lowers the operating cost.

[0071] In one embodiment, when the time period during which the negative pressure data remains in an abnormal state is greater than the preset time period and after the protection action is triggered, the method further includes:

[0072] Set up a visual data display interface to view the status of each pressure transmitter in real time;

[0073] When the process measurement deviation is greater than the preset threshold and / or the pressure transmitter fails, issue an alarm. Issuing an alarm includes: setting a hierarchical alarm threshold, and sending warning messages at different levels of warnings and alarms for different degrees of pressure values.

[0074] Optionally, first, construct a graphical user interface (GUI) to display the positions of all pressure transmitters and their current pressure values. Provide a trend graph display function so that operators can observe the pressure change trend over a period of time. Display the data quality flags (such as normal, warning, fault, etc.) of each measurement point to quickly identify the problem. Automatically refresh the data on the interface at fixed time intervals (e.g., once per second) to ensure that operators always have the latest pressure status. For any data points that exceed the preset alarm threshold, immediately highlight them on the interface or use other means to prominently prompt.

[0075] Subsequently, according to the actual working conditions and safety standards, multiple levels of alarm thresholds are set, such as minor deviation, severe deviation, emergency, etc. Each level corresponds to different handling measures, ranging from simple warnings to immediate protective actions. Specifically, when the process measurement deviation is greater than the preset threshold, the system will issue corresponding warning messages according to the degree of deviation:

[0076] Minor deviation: Issue a Warning to prompt the operator to pay attention and check the relevant parameters.

[0077] Severe deviation: Issue an Alarm to remind to take corrective measures immediately and may start part of the protection program.

[0078] Emergency: Issue a Critical Alarm to immediately trigger comprehensive protective actions to ensure the safety of equipment and personnel.

[0079] Finally, continuously monitor the working status of each pressure transmitter. Once a fault is detected in a certain transmitter, an alarm of the corresponding level is immediately issued. The fault alarm is not limited to a single device, but also combines the operating conditions of the overall system to comprehensively judge whether further measures need to be taken.

[0080] By providing a visual data display interface, the operator can always grasp the status of each pressure transmitter and the pressure change trend, so as to detect potential problems earlier and take preventive measures in time. This real-time monitoring function significantly improves the transparency and operability of the system. The hierarchical alarm mechanism enables the system to make appropriate responses in different situations, making each alarm more credible. At the same time, the clear grading also helps the operator quickly judge the severity of the problem and speeds up the decision-making and response speed.

[0081] In one embodiment, in the case where all pressure transformers on either side fail, an emergency protection program is triggered and a shutdown measure is taken.

[0082] Optionally, the working status of each pressure transmitter is monitored in real time, including the quality of its output signal and the communication connection status. If it is detected that the output data of a certain transmitter does not meet the expectation or the communication is interrupted, then mark the pressure transmitter as a fault state.

[0083] When the system detects that all three pressure transmitters on a certain side are marked as fault states, a fault alarm is immediately issued and an emergency protection program is started. The emergency protection program includes:

[0084] Shutdown Measures: Once a fault alarm is confirmed, the system immediately executes a pre-determined emergency shutdown procedure to stop the boiler operation, so as to avoid safety accidents caused by the loss of negative pressure monitoring. Record in detail the occurrence time, fault cause and shutdown measures taken for this fault, which is convenient for subsequent analysis and improvement.

[0085] Notification Mechanism: Issue the highest-level emergency alarm to notify on-site operators and the remote monitoring center to ensure that relevant personnel respond promptly. Automatically generate a fault report and send it to the designated technical support team via email or text message for quick organization of repair work.

[0086] Recovery and Restart: After shutdown, technicians should immediately conduct a comprehensive inspection of the pressure transmitter on the faulty side, find out the fault cause and repair or replace it. Only after confirming that all equipment has returned to normal operation can the boiler system be restarted according to the standard operation procedure.

[0087] When all pressure transmitters on one side are detected to be faulty, the emergency protection program is immediately triggered and shutdown measures are taken, which can effectively prevent safety accidents caused by the loss of negative pressure monitoring, such as "implosion" or "explosion", thus maximizing the safety of power plant equipment and personnel.

[0088] In summary, the embodiment of the present application provides a furnace negative pressure protection method. By respectively setting pressure transmitters on both sides of the boiler to continuously collect the negative pressure data in the furnace, and when a single or multiple pressure transmitters on either side fail, using a preset logic switching method to determine the effective measuring points for collecting negative pressure data; when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection setting value, the system determines that the negative pressure state in the furnace is abnormal; if this abnormal state lasts for more than the preset time period, a protection action is triggered. It realizes the accurate monitoring and stable control of the furnace negative pressure, significantly improves the reliability and accuracy of the protection system, effectively prevents misoperation or refusal to operate caused by local pressure fluctuations or single-point failures, ensures the safe operation of the boiler, and reduces the risk of unplanned outages. It solves the problem of misoperation in the related technology of using pressure switches to monitor the furnace negative pressure, resulting in low reliability of the furnace negative pressure protection.

[0089] In a second aspect, the embodiment of the present application provides a furnace negative pressure protection system. Figure 3 It is a block diagram of a furnace negative pressure protection system shown according to an exemplary embodiment. As Figure 3 shown, the system includes a pressure transmitter setting module, a preset logic switching method module, an abnormal state determination module and a protection action trigger module, where:

[0090] The pressure transmitter setting module is used to respectively set pressure transmitters on both sides of the boiler for continuously collecting the negative pressure data in the furnace;

[0091] A preset logic switching mode module, which is used to obtain a pressure transmitter determined to collect negative pressure data through a preset logic switching mode when a single or multiple pressure transmitters fail on either side.

[0092] An abnormal state determination module, which is used to determine that the negative pressure data in the furnace is in an abnormal state when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection setting value.

[0093] A protection action triggering module, which is used to trigger a protection action when the time period during which the negative pressure data remains in an abnormal state is greater than a preset time period.

[0094] In summary, the embodiment of the present application provides a method for protecting the negative pressure in the furnace. By respectively arranging pressure transmitters on both sides of the boiler to continuously collect the negative pressure data in the furnace, and when a single or multiple pressure transmitters fail on either side, using a preset logic switching mode to determine an effective measuring point for collecting the negative pressure data; when the pressure values of the pressure transmitters on both sides of the boiler reach the preset protection setting value, the system determines that the negative pressure state in the furnace is abnormal; if this abnormal state lasts for more than a preset time period, a protection action is triggered. It realizes the accurate monitoring and stable control of the negative pressure in the furnace, significantly improves the reliability and accuracy of the protection system, effectively prevents misoperation or refusal to operate caused by local pressure fluctuations or single-point failures, ensures the safe operation of the boiler, and reduces the risk of unplanned outages. It solves the problem of misoperation in the related technology of using pressure switches to monitor the negative pressure in the furnace, resulting in low reliability of the negative pressure protection in the furnace.

[0095] It should be noted that a system for protecting the negative pressure in the furnace provided in this embodiment is used to implement the above-mentioned implementation manners, and those that have been described will not be repeated. As used above, terms such as "module", "unit", "sub-unit", etc. can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the above embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0096] In a third aspect, the embodiment of the present application provides an electronic device, Figure 4 which is a block diagram of an electronic device shown according to an exemplary embodiment. As Figure 4 shown, the electronic device may include a processor 41 and a memory 42 storing computer program instructions.

[0097] Specifically, the above-mentioned processor 41 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0098] Among them, the memory 42 may include a mass storage for data or instructions. By way of example and not limitation, the memory 42 may include a hard disk drive (HDD), a floppy disk drive, a solid state drive (SSD), a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. In suitable cases, the memory 42 may include removable or non-removable (or fixed) media. In suitable cases, the memory 42 may be internal or external to the data processing device. In a particular embodiment, the memory 42 is a non-volatile memory. In a particular embodiment, the memory 42 includes a read-only memory (ROM) and a random access memory (RAM). In suitable cases, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically alterable ROM (EAROM), or a flash memory, or a combination of two or more of these. In suitable cases, the RAM may be a static random access memory (SRAM) or a dynamic random access memory (DRAM), where the DRAM may be a fast page mode dynamic random access memory (FPMDRAM), an extended date out dynamic random access memory (EDODRAM), a synchronous dynamic random access memory (SDRAM), etc.

[0099] The memory 42 can be used to store or cache various data files required for processing and / or communication, as well as possible computer program instructions executed by the processor 41.

[0100] The processor 41 reads and executes the computer program instructions stored in the memory 42 to implement any one of the furnace negative pressure protection methods in the above embodiments.

[0101] In one embodiment, a device for furnace negative pressure protection may further include a communication interface 43 and a bus 40. Among them, as Figure 4 shown, the processor 41, the memory 42, and the communication interface 43 are connected through the bus 40 to complete communication with each other.

[0102] The communication interface 43 is used to implement communication between the modules, devices, units, and / or devices in the embodiments of the present application. The communication port 43 can also implement data communication with other components, such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0103] The bus 40 includes hardware, software, or both, and couples components of a device for furnace negative pressure protection to each other. The bus 40 includes at least one of the following, including but not limited to: Data Bus, Address Bus, Control Bus, Expansion Bus, Local Bus. By way of example and not limitation, the bus 40 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, the bus 40 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0104] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, a method for furnace negative pressure protection provided in the first aspect is implemented.

[0105] Among them, the more specific forms that the readable storage medium can adopt may include but are not limited to: portable disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0106] In a possible implementation, the present invention can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to cause the terminal device to execute the steps of implementing a furnace negative pressure protection method provided in the first aspect.

[0107] Among them, the program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, executed as an independent software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0108] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0109] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A furnace negative pressure protection method, characterized in that: The method comprises: Pressure transmitters are installed on both sides of the boiler to continuously collect negative pressure data in the furnace; When a single or multiple pressure transmitters fail on either side, the pressure transmitter used to collect the negative pressure data is determined by a preset logic switching method; When the pressure values ​​of the pressure transmitters on both sides of the boiler reach the preset protection set values, it is determined that the negative pressure data in the furnace is in an abnormal state; When the negative pressure data continues to be in an abnormal state for a period of time greater than a preset period of time, a protection action is triggered.

2. The method according to claim 1, characterized in that The installation locations of the pressure transmitter include: At least three locations at the same height in one side of the furnace; At least three positions at the same height in the furnace on the other side.

3. The method according to claim 2, characterized in that The preset logic switching mode includes: When one of the pressure transmitters on either side fails, the logic of taking one out of two is adopted to select the pressure value of any one of the two normally working pressure transmitters as the basis for judgment; When two pressure transmitters on either side fail, the one-out-of-one logic is used to select the pressure value of a normally working pressure transmitter as the basis for judgment.

4. The method according to claim 1, characterized in that: The preset time period is set between 0.5 seconds and 5 seconds.

5. The method according to claim 1, characterized in that When the negative pressure data continues to be in an abnormal state for a period of time greater than a preset period of time, after triggering a protection action, the method further includes: Setting a visual data display interface to view the status of each pressure transmitter in real time; When the process measurement deviation is greater than a preset threshold and / or the pressure transmitter fails, an alarm is issued.

6. The method according to claim 5, characterized in that The issuing of an alarm comprises: Set graded alarm thresholds, and different pressure values ​​will issue warnings and alarms of different levels.

7. The method according to claim 1, characterized in that The method further comprises: in the case that all pressure transformers on either side fail, triggering an emergency protection program and taking shutdown measures.

8. A furnace negative pressure protection system, characterized in that: The system includes a pressure transmitter setting module, a preset logic switching mode module, an abnormal state determination module and a protection action triggering module, wherein: The pressure transmitter module is used to respectively set pressure transmitters on both sides of the boiler to continuously collect negative pressure data in the furnace; The preset logic switching mode module is used to determine the pressure transmitter used to collect the negative pressure data through a preset logic switching mode when a single or multiple pressure transmitters fail on either side; The abnormal state determination module is used to determine that the negative pressure data in the furnace is in an abnormal state when the pressure values ​​of the pressure transmitters on both sides of the boiler reach preset protection values; The protection action triggering module is used to trigger a protection action when the negative pressure data continues to be in an abnormal state for a period of time greater than a preset period of time.

9. An electronic device, characterized in that: The invention comprises a memory and a processor, a computer program stored in the memory and executable on the processor, and the processor implements a furnace negative pressure protection method as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, a furnace negative pressure protection method as described in any one of claims 1 to 7 is implemented.

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