Fault monitoring system and fault monitoring method

Abstract

The invention provides a fault monitoring system and a fault monitoring method. The system is used for carrying out fault monitoring on the blowing device of the high-tower granulation tail gas purification system. The system comprises an equipment sensing assembly and a controller, the equipment sensing assembly is at least used for obtaining working parameters of the blowing device, and the controller is used for determining the fault condition of the blowing device at least according to the working parameters obtained by the equipment sensing assembly; the assembly comprises a first pressure sensor arranged in the gas storage tank, a second pressure sensor arranged in the gas collection tank and a third pressure sensor arranged at an inlet of the pulse valve. The working parameters comprise a first pressure value detected by the first pressure sensor, a second pressure value detected by the second pressure sensor and a third pressure value detected by the third pressure sensor. According to the scheme, the fault of the blowing device can be accurately and timely found.

Description

Technical Field

[0001] This invention relates to the field of fault monitoring technology, and more specifically to a fault monitoring system and a fault monitoring method. Background Technology

[0002] High-tower granulation technology, due to its advantages such as high production efficiency, uniform particle size, and relatively low energy consumption, has been widely used in the production of granular materials in industries such as fertilizers and chemicals. In high-tower granulation, high-temperature molten material is sprayed down from the top of the tower, where it exchanges heat with rising cold air inside the tower to solidify and granulate. This process generates exhaust gas containing dust, trace amounts of harmful gases, and water vapor. Direct emission of this exhaust gas not only causes air pollution and violates environmental regulations but also leads to material waste. Therefore, a high-efficiency exhaust gas purification system is an indispensable core component of a high-tower granulation production line.

[0003] Most current mainstream high-tower granulation exhaust gas purification systems employ pulse-jet baghouse dust collection technology. Its core working principle involves using filter bags to trap dust particles in the exhaust gas, achieving gas-solid separation. The pulse-jet cleaning device is the key unit ensuring dust removal efficiency. This device periodically injects compressed air or other media into the filter bags to clean the dust adhering to their surface, preventing filter bag clogging that could increase system resistance and reduce airflow, thus ensuring stable and compliant exhaust gas purification. Therefore, the continuous and stable operation of the pulse-jet cleaning device directly determines the efficiency of the exhaust gas purification system, thereby affecting the environmental compliance and continuous production capacity of the entire high-tower granulation production line.

[0004] However, in actual industrial applications, the pulse-jet cleaning system is prone to various malfunctions due to complex operating environments (high temperature, high humidity, corrosive media), long-term high-frequency operation, and pipeline vibration and wear. These malfunctions mainly include: leakage and blockage in the pulse-jet pipeline, jamming or failure of the pulse solenoid valve, unstable pulse-jet pressure / flow, and abnormal pulse-jet frequency. If these malfunctions are not detected and addressed in a timely manner, they will trigger a series of chain reactions: First, incomplete cleaning of the filter bags will exacerbate blockages, causing a surge in the resistance of the purification system. This not only reduces the efficiency of exhaust gas treatment but may also cause overload damage to the induced draft fan, forcing unplanned shutdowns of the production line. Second, insufficient supply or uneven spraying of the pulse-jet medium will result in dust concentrations in the exhaust gas failing to meet emission standards, posing a risk of environmental penalties to the company. Furthermore, dust diffusion can harm the health of on-site operators. Third, traditional manual inspection methods suffer from drawbacks such as delayed response, low detection accuracy, and limited coverage. They are difficult to detect potential malfunctions in real time in complex production environments, often only being discovered after the malfunction has escalated and the system has failed, leading to increased maintenance costs and production losses.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The present invention is proposed in view of the above-mentioned problems. According to one aspect of the present invention, a fault monitoring system is provided for monitoring faults in the pulse-jet cleaning device of a high-tower granulation tail gas purification system. The tail gas purification system includes an inlet pipe, a bag filter assembly, and an outlet pipe connected in sequence. The pulse-jet cleaning device includes a gas storage tank, a gas collection box, a pulse valve, and a pulse-jet pipe. The gas storage tank is connected to the gas collection box via a gas supply pipe. The inlet of the pulse valve is connected to the gas collection box, and the outlet is connected to the pulse-jet pipe. The pulse-jet pipe is provided with a plurality of pulse-jet nozzles, each corresponding to a plurality of filter bags in the bag filter assembly. The fault monitoring system includes a device sensing component and a controller. The device sensing component is used to acquire at least the operating parameters of the blowing device, and the controller is used to determine the fault condition of the blowing device based at least on the operating parameters acquired by the device sensing component. The device sensing components include a first pressure sensor disposed in the gas storage tank, a second pressure sensor disposed in the gas collection box, and a third pressure sensor disposed at the inlet of the pulse valve; the operating parameters include a first pressure value detected by the first pressure sensor, a second pressure value detected by the second pressure sensor, and a third pressure value detected by the third pressure sensor. Wherein, when the operating parameters meet the first parameter condition, the controller determines that the fault condition is a pipeline leak between the gas collection box and the pulse valve; the first parameter condition includes: the first pressure value is within a first preset pressure range, the second pressure value is lower than the lower limit of the second preset pressure range, and the third pressure value is lower than the lower limit of the third preset pressure range.

[0007] For example, the device sensing component further includes a fourth pressure sensor disposed at the outlet of the pulse valve; the operating parameters further include a fourth pressure value detected by the fourth pressure sensor; the first parameter condition further includes that when the blowing device is not blowing, the fourth pressure value is less than a pressure threshold.

[0008] For example, when the operating parameters meet the second parameter condition, the controller determines that the fault condition is a pulse valve fault; the second parameter condition is: the first pressure value is within a first preset pressure range, the second pressure value is within a second preset pressure range, the third pressure value is within a third preset pressure range, and the difference between the maximum value of the fourth pressure value collected during the blowing process of the blowing device and the third pressure value is greater than the differential pressure threshold.

[0009] For example, the device sensing component further includes a pulse state sensor disposed on the pulse valve; the pulse state sensor is used to detect the coil on / off action signal of the pulse valve; the operating parameters also include the on / off action signal detected by the pulse state sensor; wherein, when the fault condition is a pulse valve fault, if the on / off action signal is detected during the blowing process of the blowing device, the pulse valve fault is that the pulse valve is stuck or blocked; if the on / off action signal is not detected during the blowing process of the blowing device, the pulse valve fault is that the electrical control circuit of the pulse valve is faulty.

[0010] For example, when the operating parameters meet the third parameter condition, the controller determines that the fault condition is a gas source fault of the gas storage tank; The third parameter condition includes: the first pressure value is not within the first preset pressure range; or, within a first preset time period, the fluctuation range of the first pressure value is greater than the first amplitude threshold, the fluctuation range of the second pressure value is greater than the second amplitude threshold, and the fluctuation range of the third pressure value is greater than the third amplitude threshold.

[0011] For example, after determining the fault condition, the controller is further configured to: determine the fault level, and perform corresponding fault handling operations according to the fault level; The fault levels include Level 1 faults and Level 2 faults. Level 1 faults include pipeline leaks and pulse valve malfunctions, while Level 2 faults include gas source malfunctions. The fault handling operations corresponding to Level 1 faults include stopping the blowing device and sending alarm information. The fault handling operations corresponding to Level 2 faults include sending reminder information and performing adaptive adjustment operations based on the fault conditions. Preferably, when the secondary fault is an air source fault, the adaptive adjustment operation is to adjust the loading frequency of the air compressor connected to the air tank.

[0012] For example, when the operating parameters meet the fourth parameter condition, the controller determines that the fault condition is a leak in the gas collection box pipeline; The fourth parameter condition is: within the second preset time period, the decrease in the second pressure value is greater than the fourth amplitude threshold and the first pressure value decreases synchronously.

[0013] For example, the device sensing component further includes a flow sensor and a dust concentration sensor, the flow sensor being disposed on the gas supply pipeline and the dust concentration sensor being disposed on the gas outlet pipeline; the exhaust gas purification system includes a differential pressure gauge for measuring system resistance; the operating parameters include the flow rate value detected by the flow sensor and the dust concentration value detected by the dust concentration sensor; Wherein, when the operating parameters meet the fifth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is that the blowing frequency of the blowing device is insufficient; the fifth parameter condition is: the dust concentration value is continuously higher than the first dust threshold and the flow rate value is within the preset flow rate range; Wherein, when the operating parameters meet the sixth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is insufficient supply of the blowing medium of the blowing device; the sixth parameter condition is: the dust concentration value is continuously lower than the second dust threshold and the flow rate value is within the preset flow rate range; the second dust threshold is lower than the first dust threshold.

[0014] For example, the fault monitoring system further includes a host computer; the host computer is connected to the controller to display the operating parameters acquired by the controller.

[0015] The present invention also provides a fault monitoring method, which uses the above-mentioned fault monitoring system to monitor the faults of the injection device of the high tower granulation tail gas purification system.

[0016] In the above technical solution, by collecting operating parameters from locations such as the gas storage tank, gas collection box, and pulse valve inlet of the injection device, and conducting comprehensive analysis based on these operating parameters, the fault situation can be determined. On the one hand, this method of judgment based on multi-dimensional parameters can quickly and accurately locate fault types such as pipeline leaks between the gas collection box and the pulse valve, achieving precise and real-time fault monitoring. The fault identification response time can be shortened by more than 90% compared to traditional manual inspection, effectively preventing the escalation of faults. On the other hand, this method of determining the fault situation in real time can provide maintenance personnel with early warnings and fault location, ensuring the dual stability of production and environmental protection, and significantly reducing the probability of unplanned downtime. Practical application verification has shown that this solution can increase the continuous operating time of the production line by more than 30%, while ensuring that the jet cleaning device is always in a highly efficient dust removal state, and the dust emission concentration in the exhaust gas is stably controlled below the standard limit, completely avoiding environmental risks. Furthermore, the entire execution process of this solution is automated, replacing the traditional high-frequency manual inspection mode with automated detection. This helps reduce the number of on-site maintenance personnel, lowering maintenance costs and labor intensity. Moreover, the data in this solution is uniformly collected in the controller, which facilitates historical data tracing and analysis by maintenance personnel, providing data support for preventive maintenance and reducing spare parts wear and repair costs. At the same time, this solution only requires the addition of a few sensors to the existing exhaust gas purification system and its jet cleaning device, thus being compatible with jet cleaning devices of different scales of high-tower granulation exhaust gas purification systems. It also supports subsequent integration with the intelligent control platform of the production line, which helps to achieve intelligent production control throughout the entire process, providing core technical support for the green and intelligent upgrading of the high-tower granulation industry. In summary, this solution can effectively compensate for the shortcomings of traditional operation and maintenance methods, provide early warning of potential faults, reduce the probability of unplanned downtime, and ensure that exhaust emissions continuously meet standards. It has important practical significance for improving the production management level and environmental governance capabilities of the high-tower granulation industry.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0018] The above and other objects, features, and advantages of the present invention will become more apparent from the more detailed description of the embodiments of the invention in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same parts or steps.

[0019] Figure 1A schematic diagram of the high-tower granulation tail gas purification system of Embodiment 1 of the present invention is shown; Figure 2 for Figure 1 Enlarged view of the structure of section A; Figure 3 A schematic block diagram of the fault monitoring system according to Embodiment 1 of the present invention is shown.

[0020] In the diagram: 1. Air tank; 2. First pressure sensor; 3. Air supply pipeline; 4. Flow sensor; 5. Air collection box; 6. Second pressure sensor; 7. Pulse valve; 8. Pulse status sensor; 9. Blowpipe; 10. Fourth pressure sensor; 11. Blowpipe nozzle; 12. Air outlet pipeline; 13. Dust concentration sensor; 14. Bag filter assembly; 15. Inlet valve; 16. Air compressor; 17. Third pressure sensor; 18. Controller; 19. Host computer. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0022] With increasingly stringent national environmental regulations (such as the tightening of limits on industrial dust emission concentrations in the "Integrated Emission Standard for Air Pollutants") and the transformation of industrial production towards intelligent and unmanned operations, the traditional operation and maintenance mode of injection molding equipment, which relies on manual inspection, can no longer meet the high requirements of high-tower granulation production lines for environmental stability and production continuity. Against this backdrop, developing an intelligent fault monitoring solution capable of real-time and accurate monitoring of the injection molding system's operating status, automatically identifying and locating faults, has become a key technological requirement for addressing current pain points in injection molding equipment operation and maintenance, ensuring the efficient operation of the exhaust gas purification system, and promoting the green and intelligent upgrade of high-tower granulation processes. Therefore, this invention provides a fault monitoring system and fault detection method. This system and method can effectively compensate for the shortcomings of traditional operation and maintenance methods, provide early warnings of potential faults, reduce the probability of unplanned downtime, and ensure continuous compliance of exhaust gas emissions. This has significant practical implications for improving the production management level and environmental governance capabilities of the high-tower granulation industry.

[0023] To more clearly illustrate the technical solutions in this invention, specific embodiments are described below.

[0024] Example 1 This embodiment provides a fault monitoring system for monitoring faults in the injection device of the high-tower granulation tail gas purification system. Figure 1 This diagram shows a high-tower granulation tail gas purification system according to Embodiment 1 of the present invention. Figure 2 for Figure 1 Enlarged view of section A. It can be understood that the exhaust gas purification system and its injection device are existing technologies. Figure 1 Only the parts closely related to the fault monitoring system of the present invention are shown; other parts are omitted. Figure 1 As shown, the exhaust gas purification system includes an inlet pipe, a bag filter assembly 14, and an outlet pipe 12 connected in sequence. The exhaust gas from the high-tower granulation enters the bag filter assembly 14 through the inlet pipe, and the exhaust gas treated by the bag filter assembly 14 is discharged through the outlet pipe 12.

[0025] The pulse-jet cleaning device includes an air tank 1, an air collection box 5, a pulse valve 7, and a pulse-jet pipe 9. The air tank 1 is connected to the air collection box 5 via an air supply pipeline 3. The inlet of the pulse valve 7 is connected to the air collection box 5, and the outlet is connected to the pulse-jet pipe 9. Multiple pulse-jet nozzles 11 are installed on the pulse-jet pipe 9, each corresponding to a different filter bag in the bag filter assembly 14. In actual use, the pulse valve 7 in the pulse-jet cleaning device is periodically activated. When the pulse valve 7 is open, the pulse-jet air in the air collection box 5, under pressure, rapidly enters the filter bags through the pulse-jet pipe 9 and the pulse-jet nozzles 11, cleaning the dust adhering to the surface of the filter bags. In this embodiment, air can be supplied to the air tank 1 via an air compressor 16, and an inlet valve 15 can be installed on the pipeline between the air compressor 16 and the air tank 1.

[0026] Figure 3 A schematic block diagram of the fault monitoring system according to Embodiment 1 of the present invention is shown. Figure 3 As shown, the fault monitoring system includes an equipment sensing component and a controller 18. The equipment sensing component is used to acquire at least the operating parameters of the purging device, and the controller 18 is used to determine the fault status of the purging device based on at least the operating parameters acquired by the equipment sensing component. These operating parameters may include one or more of the following: pressure (e.g., inlet and outlet pressure of pulse valve 7, pressure of air tank 1, pressure of air collection box 5, pressure of purging nozzle 11, etc.), flow rate (e.g., flow rate of air supply line 3, flow rate of purging pipe 9, etc.), and the status of pulse valve 7. These parameters can all reflect the operating status of the purging device, and through these operating parameters, possible faults of the purging device can be comprehensively analyzed. Of course, the equipment sensing component can also acquire other parameters, such as the dust concentration of the air outlet line 12, which can reflect the filtration effect of the filter bag, and thus indirectly reflect the operating status of the purging device.

[0027] The controller 18 can be deployed locally or in the cloud. In some implementations, a data transmission layer can be designed locally. This data transmission layer can consist of a data transmission bus and a data acquisition terminal. The data acquisition terminal can connect to each sensor in the device's sensing components via the data transmission bus (e.g., a RS-485 bus) and can connect to the controller 18 via fiber optic or wireless networks (e.g., 4G, 5G, or Ethernet). The data acquisition terminal collects the detection information from each sensor in real time, converts the collected analog data into digital data, and then transmits it to the controller 18 via fiber optic or wireless network with encryption. A CRC-32 checksum algorithm can be used during data transmission to ensure the accuracy of the data transmission. The controller 18 can be connected to an industrial-grade touchscreen for real-time display of parameters and fault information on-site.

[0028] Continue reading Figure 3 The fault monitoring system may also include a host computer 19; this host computer 19 is connected to the controller 18 to display the operating parameters acquired by the controller 18. For example, an industrial control computer can be deployed in the central control room as the host computer 19 to build a visual monitoring interface; a cloud server can also be deployed to store historical operating data and fault records. Additionally, an SMS alert module can be configured and linked to the mobile terminals of maintenance personnel to achieve multi-channel push notifications of fault information. Based on the host computer 19, a visual monitoring interface can be further built to display the operating parameters and fault alarm information of the purging device, while supporting multiple channels such as SMS and WeChat alerts, recording historical fault data, and providing a basis for subsequent maintenance. Furthermore, trend curves can be generated based on real-time collected data to intuitively reflect the system's operating status.

[0029] In this embodiment, in conjunction with reference to Figure 1-3 The device sensing components include a first pressure sensor 2 installed in the gas storage tank 1, a second pressure sensor 6 installed in the gas collection box 5, and a third pressure sensor 17 installed at the inlet of the pulse valve 7; the operating parameters include a first pressure value detected by the first pressure sensor 2, a second pressure value detected by the second pressure sensor 6, and a third pressure value detected by the third pressure sensor 17.

[0030] In this embodiment, the first pressure sensor can be installed on the top of the air tank. The first pressure sensor monitors the air source pressure of the injection device and reflects the stability of the compressed air supply. The first preset pressure range can be selected according to actual needs, for example, 0.5-0.6 MPa. It is understood that if the pressure in the air tank remains below 0.5 MPa, it indicates insufficient air supply, which may be due to air compressor failure or a blocked intake valve. If the air tank pressure remains above 0.6 MPa, the air tank itself may have an abnormality, such as a malfunctioning pressure relief valve; in this case, the pressure relief device needs to be checked promptly.

[0031] The second pressure sensor monitors the real-time pressure of the medium supplied from the gas collection box to the pipeline, reflecting the pressure holding and injection capabilities of the gas collection box. It can be understood that when the gas collection box is in the pressure holding phase (pulse valve closed), the pressure inside the gas collection box should be basically the same as the pressure in the gas storage tank. When the gas collection box is in the injection phase (pulse valve activated), the pressure inside the gas collection box will drop instantaneously and then quickly rise again. If the pressure drops by ≥3 kPa per minute during the pressure holding phase, the fault may be due to leakage in the injection tank (such as cracked tank wall welds, inlet / outlet valve seal failure), or damage to the pulse valve. If the pressure fails to rise after dropping during the injection phase, the fault may be due to jammed injection tank inlet valve, gas storage tank leakage, or air compressor malfunction, resulting in an inability to replenish pressure in a timely manner.

[0032] The third pressure sensor is used to detect the pressure at the input end of the pulse valve, reflecting the pressure transmission status between the air collection box and the pulse valve. Under normal conditions, the pressure value it detects should be consistent with and change synchronously with the pressure value of the air collection box. If the pressure in the air collection box is normal, but the pressure at the input end of the pulse valve is significantly lower, there may be a blockage or leak in the pipeline from the air collection box to the pulse valve (such as dust accumulation in the pipeline or damage to the flange gasket).

[0033] In this embodiment, all pressure sensors can be diffused silicon pressure sensors, with a measurement range set to 0-1 MPa and an accuracy class of 0.5. Of course, the type of pressure sensor can be adjusted according to actual working conditions and requirements; this document does not impose any restrictions on this. Furthermore, all sensors in this document (including pressure sensors and, hereinafter, flow sensors, pulse status sensors, dust concentration sensors, etc.) can be encapsulated in waterproof and dustproof housings to achieve an IP65 protection rating, thus adapting to the high-temperature, high-humidity, and dusty working environment of high-tower granulation workshops.

[0034] Each pressure sensor in this embodiment can be pre-calibrated before being put into use. For example, error correction can be performed at three key pressure points: 0.4 MPa, 0.5 MPa, and 0.6 MPa, to ensure that the measurement error is within the allowable range.

[0035] When a single data point is abnormal, the corresponding fault conditions may include many types. In this embodiment, multiple data points are considered to determine the fault type. In some implementations of this embodiment, when the controller meets the first parameter condition, it determines the fault condition as a pipeline leak between the gas collection box and the pulse valve. The first parameter condition includes: a first pressure value within a first preset pressure range, a second pressure value below the lower limit of the second preset pressure range, and a third pressure value below the lower limit of the third preset pressure range. In this scheme, the second and third pressure values ​​are selected from the pressure values ​​when the blowing device is not blowing. The first, second, and third preset pressure ranges can all be selected according to actual needs. For example, the first, second, and third preset pressure ranges can all be 0.25-0.35 MPa.

[0036] In the above technical solution, by collecting operating parameters from locations such as the gas storage tank, gas collection box, and pulse valve inlet of the injection device, and conducting comprehensive analysis based on these operating parameters, the fault situation can be determined. On the one hand, this method of judgment based on multi-dimensional parameters can quickly and accurately locate fault types such as pipeline leaks between the gas collection box and the pulse valve, achieving precise and real-time fault monitoring. The fault identification response time can be shortened by more than 90% compared to traditional manual inspection, effectively preventing the escalation of faults. On the other hand, this method of determining fault situations in real time can provide maintenance personnel with early warnings and fault location, ensuring the dual stability of production and environmental protection, and significantly reducing the probability of unplanned downtime. Practical application verification has shown that this solution can increase the continuous operating time of the production line by more than 30%, while ensuring that the jet cleaning device is always in a highly efficient dust removal state, and the dust emission concentration in the exhaust gas is stably controlled below the standard limit, completely avoiding environmental risks. Furthermore, the entire execution process of this solution is automated, replacing the traditional high-frequency manual inspection mode with automated detection. This helps reduce the number of on-site maintenance personnel, lowering maintenance costs and labor intensity. Moreover, the data in this solution is uniformly collected in the controller, which facilitates historical data tracing and analysis by maintenance personnel, providing data support for preventive maintenance and reducing spare parts wear and repair costs. At the same time, this solution only requires the addition of a few sensors to the existing exhaust gas purification system and its jet cleaning device, thus being compatible with jet cleaning devices of different scales of high-tower granulation exhaust gas purification systems. It also supports subsequent integration with the intelligent control platform of the production line, which helps to achieve intelligent production control throughout the entire process, providing core technical support for the green and intelligent upgrading of the high-tower granulation industry. In summary, this solution can effectively compensate for the shortcomings of traditional operation and maintenance methods, provide early warning of potential faults, reduce the probability of unplanned downtime, and ensure that exhaust emissions continuously meet standards. It has important practical significance for improving the production management level and environmental governance capabilities of the high-tower granulation industry.

[0037] Continue reading Figure 2 , 3 In some implementations of this embodiment, the device sensing component further includes a fourth pressure sensor 10 disposed at the outlet of the pulse valve 7; the operating parameters also include a fourth pressure value detected by the fourth pressure sensor 10; the first parameter condition also includes that when the blowing device is not blowing, the fourth pressure value is less than the pressure threshold.

[0038] The fourth pressure sensor monitors the pressure at the output of the pulse valve, directly reflecting the actual opening and closing status and injection effect of the pulse valve. When the pulse valve is functioning correctly, the pressure should be close to 0 MPa when the valve is closed; when the valve is open, the pressure should instantly rise to the same level as the pressure before the valve. If the pressure value is >0.1 MPa when the pulse valve is closed, the fault may be internal leakage in the pulse valve (valve disc seal failure). If the pressure is much lower than the pressure before the valve when the pulse valve is open, the pulse valve may be stuck or insufficiently open, failing to achieve effective injection.

[0039] In this scheme, the first parameter condition also includes a fourth pressure value being less than a pressure threshold when the purging device is not purging. This pressure threshold can be 0.1 MPa. When the fourth pressure value is less than the pressure threshold, problems with the pulse valve itself (such as internal leakage) can be ruled out, thus pinpointing the fault more precisely to the pipeline between the air collection box and the pulse valve. If the fourth pressure value is greater than or equal to the pressure threshold when the purging device is not purging, then the problem is likely an internal leak in the pulse valve, rather than a problem with the pipeline between the air collection box and the pulse valve.

[0040] In summary, the above solution, by adding a fourth pressure sensor at the pulse valve outlet and incorporating its detected fourth pressure value into the operating parameters, and by explicitly defining the requirement that "the fourth pressure value is less than the pressure threshold when the blowing device is not blowing," enables accurate and real-time monitoring of the pulse valve outlet pressure. This allows for the real-time detection of abnormal pressure increases at the pulse valve outlet (such as airflow leakage due to poor valve sealing or pressure buildup caused by pipeline blockage), thereby proactively identifying potential faults such as pulse valve seal failure and abnormal pipeline flow. This prevents abnormal outlet pressure from affecting the pressure stability and media delivery efficiency of subsequent blowing operations, further enhancing the comprehensiveness and accuracy of the equipment's sensing components in monitoring system pressure status, and providing technical support for the overall reliability and fault warning capabilities of the equipment.

[0041] In some implementation schemes of this embodiment, the controller can determine that the fault is a pulse valve fault when the working parameters meet the second parameter condition; the second parameter condition is: the first pressure value is within the first preset pressure range, the second pressure value is within the second preset pressure range, the third pressure value is within the third preset pressure range, and the difference between the maximum value of the fourth pressure value collected during the blowing process of the blowing device and the third pressure value is greater than the differential pressure threshold.

[0042] In this embodiment, if the collected first, second, and third pressure values ​​are all within their respective pressure ranges, but the pressure difference across the pulse valve is large during the injection phase, a pulse valve malfunction is determined. This could be due to insufficient pulse valve opening or even complete pulse valve failure. In a further embodiment, if the fourth pressure value collected during the injection process is consistently lower than the pressure threshold, the malfunction type can be determined to be complete pulse valve failure.

[0043] In the above scheme, by matching the first, second, and third pressure values ​​with their corresponding preset pressure ranges, non-pulse valve faults caused by overall pressure system anomalies (such as excessively high or low overall system pressure, pressure fluctuations, or pipeline leaks exceeding normal operating conditions) are first eliminated from the perspective of basic pressure parameters. Then, by combining the key dynamic parameter of whether the difference between the maximum value of the fourth pressure value and the third pressure value collected during the injection process of the injection device is greater than the differential pressure threshold, the scheme further captures the functional abnormalities that may occur in the pulse valve during actual operation (injection action)—such as abnormal pressure changes caused by problems such as poor pulse valve sealing, valve core jamming, or complete pulse valve failure. Finally, a dual judgment logic of "basic pressure range screening + dynamic differential pressure verification" is formed, which effectively improves the accuracy and reliability of pulse valve fault judgment, avoids misjudgment and omission that may occur with single pressure parameter judgment, and can monitor and trigger fault judgment in real time during the injection process, shortening the fault identification cycle and providing technical support for the stable operation of the injection device.

[0044] In some implementations of this embodiment, the device sensing component further includes a pulse state sensor 8 disposed on the pulse valve 7; the pulse state sensor 8 is used to detect the coil on / off action signal of the pulse valve 7; the operating parameters also include the on / off action signal detected by the pulse state sensor 8; wherein, when the fault condition is a pulse valve fault, if an on / off action signal is detected during the blowing process of the blowing device, the pulse valve fault is that the pulse valve is stuck or blocked; if no on / off action signal is detected during the blowing process of the blowing device, the pulse valve fault is that the electrical control circuit of the pulse valve is faulty.

[0045] This pulse status sensor, which can be a Hall effect sensor with an operating voltage of 5-24V, is used to detect the on / off status and response time of the solenoid valve. This pulse status sensor can directly detect solenoid valve malfunctions. Specifically, when the pulse valve's response time (the time from receiving the on / off action signal to fully opening / closing) is less than 100ms, the pulse valve can be determined to be fault-free. If no on / off action signal is detected during the injection process, it may be a fault in the pulse valve's electrical control circuit. When an on / off action signal is detected during the injection process, and the second parameter condition is met, the pulse valve malfunction may specifically be due to jamming or blockage.

[0046] In some implementations, multiple pulse valves installed on the gas collection box are connected in parallel. When a pulse valve failure is detected, the controller can shut down the branch containing the current pulse valve (this can be achieved through valves on the branch) and open a backup pulse valve. This ensures continuous production and reduces downtime.

[0047] The above solution, by adding a pulse status sensor to the pulse valve and incorporating the detected coil on / off action signal into the equipment's operating parameter system, enables precise and differentiated diagnosis of pulse valve faults under various operating scenarios of the jetting device. Specifically, when the jetting device is in the jetting process, if the pulse status sensor detects an on / off action signal, the pulse valve fault type can be directly determined to be jamming or blockage, ruling out electrical control issues. If no on / off action signal is detected, the root cause of the fault can be clearly identified as the electrical control circuit of the pulse valve, effectively avoiding the confusion between mechanical jamming and electrical faults in traditional fault diagnosis. This technical design significantly improves the accuracy and efficiency of pulse valve fault diagnosis, reduces the blindness of fault location, helps to quickly pinpoint the repair target, reduces equipment downtime for maintenance, and ensures the overall stability and reliability of the jetting device.

[0048] In some implementation schemes of this embodiment, when the operating parameters meet the third parameter condition, the controller determines that the fault is a gas source fault of the gas storage tank; wherein, the third parameter condition includes: the first pressure value is not within the first preset pressure range; or, the fluctuation range of the first pressure value is greater than the first amplitude threshold within the first preset time period, the fluctuation range of the second pressure value is greater than the second amplitude threshold, and the fluctuation range of the third pressure value is greater than the third amplitude threshold.

[0049] The pressure fluctuation range can be the difference between the maximum and minimum pressure values ​​detected within a certain time period (e.g., 1 minute). The amplitude threshold can be selected as needed, for example, 0.05 MPa. In the above scheme, when the pressure in the air tank is not within the first preset pressure range, or when the pressure in the air tank, the pressure in the air collection box, and the pressure at the pulse valve inlet fluctuate synchronously, the fault type can be determined to be a fault in the air source of the air tank. Specific faults may include air compressor frequency converter failure, insufficient air volume in the air tank, etc.

[0050] In the above scheme, multi-dimensional data synchronous judgment is used to determine whether there is an anomaly in the gas source. On the one hand, when the first pressure value, which directly reflects the core pressure status of the gas storage tank, does not fall within the first preset pressure range, the pressure deviation caused by the abnormal gas supply can be quickly identified, realizing a direct and immediate judgment of the basic gas source failure. On the other hand, for complex gas source failure scenarios that may not be a single pressure value anomaly but rather a coordinated fluctuation of multiple pressure parameters, by setting judgment conditions that the first, second, and third pressure values ​​exceed the corresponding amplitude thresholds within the first preset time period, it can cover failure situations caused by gas source instability (such as pulse fluctuations in gas source pressure, imbalance of gas supply from multiple channels, etc.), avoiding misjudgment or missed judgment of failures due to blind spots in single parameter monitoring, and ultimately significantly improving the accuracy, comprehensiveness, and timeliness of gas source failure identification for gas storage tanks, providing reliable technical support for subsequent fault warning, emergency handling, and safe operation of equipment, and effectively reducing the risk of equipment downtime and safety hazards caused by gas source failure.

[0051] In some implementation schemes of this embodiment, the controller determines the fault condition as leakage in the gas collection box pipeline when the operating parameters meet the fourth parameter condition; wherein, the fourth parameter condition is: the decrease of the second pressure value is greater than the fourth amplitude threshold and the first pressure value decreases synchronously within the second preset time period.

[0052] Both the second preset time period and the fourth amplitude threshold can be selected according to actual needs. For example, the second preset time period can be 1 minute, and the fourth amplitude threshold can be 0.08 MPa. In this case, when the pressure in the gas collection box drops by 0.08 MPa within 1 minute, and the pressure in the gas storage tank drops synchronously, the fault type can be determined to be a leak in the gas collection box pipeline, and the fault location can be locked at the flange connecting the gas collection box and the gas transmission pipeline.

[0053] In the above scheme, the controller can accurately capture the typical pressure change characteristics of the gas collection box pipeline leakage fault by setting the fourth parameter condition that "the second pressure value drops more than the fourth amplitude threshold and the first pressure value drops synchronously within the second preset time period". This means that the controller can lock the core signal of abnormal pressure attenuation by relying on the significant drop of the second pressure value, and eliminate the interference that may exist in single pressure monitoring (such as occasional sensor errors, local airflow fluctuations and other non-leakage factors) by the synchronous drop of the first pressure value. This achieves the directional identification and accurate judgment of the gas collection box pipeline leakage fault, effectively avoids the problem of misjudgment or missed judgment of fault, improves the accuracy and reliability of fault diagnosis and location, and provides an accurate fault judgment basis for timely activation of countermeasures and ensuring stable operation of the system.

[0054] like Figure 1 As shown, in this embodiment, the device sensing component further includes a flow sensor 4 and a dust concentration sensor 13. The flow sensor 4 is disposed on the gas supply pipeline 3, and the dust concentration sensor 13 is disposed on the gas outlet pipeline 12. The exhaust gas purification system includes a differential pressure gauge for measuring system resistance. The operating parameters include the flow rate value detected by the flow sensor and the dust concentration value detected by the dust concentration sensor. When the operating parameters meet the fifth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is insufficient blowing frequency of the blowing device. The fifth parameter condition is: the dust concentration value is continuously higher than the first dust threshold, and the flow rate value is within the preset flow range. When the operating parameters meet the sixth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is insufficient supply of blowing medium for the blowing device. The sixth parameter condition is: the dust concentration value is continuously lower than the second dust threshold, and the flow rate value is within the preset flow range. The second dust threshold is lower than the first dust threshold.

[0055] The flow sensor can be a vortex flow sensor, with a measurement range of 0-50 m³ / h and an accuracy class of 1.0, used to monitor the flow data of the jetting medium (compressed air). The dust concentration sensor can be a laser dust concentration sensor, with a measurement range of 0-100 mg / Nm³ and a response time ≤200 ms, used to monitor the dust concentration in the purified exhaust gas. If the concentration exceeds the standard, it can indirectly reflect poor jetting cleaning effect (such as filter bag blockage or abnormal jetting frequency). The dust concentration sensor is calibrated using a standard dust generator, setting standard dust concentrations of 5 mg / Nm³, 10 mg / Nm³, and 20 mg / Nm³, and adjusting the sensor output signal to the matching value. The flow sensor is calibrated using a standard flow calibration device, calibrating at flow points of 20 m³ / h, 30 m³ / h, and 40 m³ / h to ensure that the flow measurement accuracy meets the standard.

[0056] The first dust threshold can be 3 mg / m³ 3The second dust threshold can be 1 mg / m³. 3 The preset flow rate range is 15-30 m³ / h. The preset resistance range has an upper limit of 1200 Pa and a lower limit of 800 Pa. In this case, if the system resistance exceeds the upper limit and the dust concentration sensor data consistently exceeds 3 mg / m³, while the flow sensor shows the main purging pipeline flow rate is within the normal range, it indicates that the filter bags are accumulating dust quickly, and the regular purging frequency is insufficient. If the system resistance exceeds the upper limit, but the dust concentration is below 1 mg / m³, and the flow sensor shows a low flow rate, it may be a false high resistance caused by insufficient purging medium supply. For the former, the controller controls the pulse solenoid valve group to shorten the purging interval (e.g., from 20 seconds to 12 seconds) and extend the single purging time; for the latter, it controls the air tank inlet valve to increase the opening to supplement the air supply, rather than blindly increasing the purging frequency.

[0057] The above solution achieves accurate and automated identification of fault types in the jet purifier by adding a flow sensor to the gas supply pipeline and a dust concentration sensor to the gas outlet pipeline in the equipment sensing components, and combining it with a differential pressure gauge used to measure system resistance in the exhaust gas purification system. Specifically, the controller can perform a comprehensive analysis based on two core operating parameters: the flow rate detected by the flow sensor and the dust concentration detected by the dust concentration sensor, combined with the system resistance data fed back by the differential pressure gauge. When the system resistance exceeds the upper limit of the preset resistance range, if the operating parameters meet the fifth parameter condition of "the dust concentration value is continuously higher than the first dust threshold and the flow rate value is within the preset flow range", the fault can be accurately determined to be insufficient jet purifier frequency. If the sixth parameter condition of "the dust concentration value is continuously lower than the second dust threshold (and the second dust threshold is lower than the first dust threshold) and the flow rate value is within the preset flow range" is met, the fault can be accurately identified as insufficient supply of jet purifier medium. This design effectively avoids the vague judgment of the fault type of the injection device in traditional fault diagnosis, greatly improves the accuracy and efficiency of fault location, reduces the cost and error of manual troubleshooting, and ensures the objectivity and repeatability of the fault identification process through clear parameter conditions and logical connections, providing reliable technical support for the stable operation and timely maintenance of the exhaust gas purification system.

[0058] In some implementation schemes of this embodiment, after determining the fault condition, the controller is further configured to: determine the fault level, and execute corresponding fault handling operations according to the fault level; wherein, the fault level includes a first-level fault and a second-level fault, a first-level fault includes pipeline leakage and pulse valve failure, and a second-level fault includes air source failure; the fault handling operations corresponding to the first-level fault include stopping the operation of the jetting device and sending an alarm message; the fault handling operations corresponding to the second-level fault include sending a reminder message and performing an adaptive adjustment operation according to the fault condition. Wherein, when the second-level fault is an air source failure, the adaptive adjustment operation is to adjust the loading frequency of the air compressor connected to the air tank.

[0059] In this embodiment, faults that can be overcome by parameter adjustment are classified as Level 2 faults; otherwise, they are classified as Level 1 faults. In cases such as pipeline leaks or pulse valve malfunctions, an audible and visual alarm can be triggered, an alarm message can be sent via SMS, and the pulse jetting of that line can be suspended. Of course, if a backup pulse valve or backup pipeline exists, it can automatically switch to the backup pulse valve or backup pipeline, only suspending the use of the faulty component. In cases such as air source failures, the compressor loading frequency can be automatically adjusted first, triggering a pop-up reminder on the touchscreen.

[0060] In one specific embodiment, for Level 1 faults (such as sudden pressure drop or solenoid valve failure), the central control room's audible and visual alarm can be activated immediately. Simultaneously, a fault information message is pushed to the mobile phones of the operations supervisor and on-site operations personnel via an SMS alert module. The message includes information such as "Fault type: Leakage in the injection tank pipeline; Fault location: Injection tank outlet flange; Abnormal parameters: Current pressure 0.32 MPa, standard range 0.4-0.6 MPa." For Level 2 faults (such as excessive dust concentration), only a touchscreen pop-up alert and SMS notification are activated. Simultaneously, the host computer's visual interface automatically highlights the device icon corresponding to the fault location, marking the abnormal parameters and the fault occurrence time, facilitating rapid location by operations personnel.

[0061] In the above scheme, after determining the fault situation, the controller further performs fault level judgment and differentiated handling operations, which can achieve multi-dimensional technical effects: On the one hand, by clearly dividing the first-level fault (pipeline leakage, pulse valve failure) and the second-level fault (air source failure), it achieves accurate identification and classification of faults of different severity, avoiding blind and homogenized fault handling; on the other hand, the handling operation of "stopping the working of the injection device + sending alarm information" for the first-level fault can cut off the risk source through emergency shutdown when the fault may cause serious consequences such as equipment damage and system failure, and promptly notify relevant personnel to intervene and handle the situation, minimizing the loss caused by the escalation of the fault; while the operation of "sending reminder information + adaptive adjustment (such as adjusting the loading frequency of the air compressor connected to the air tank)" for the second-level fault (air source failure) not only ensures that personnel are aware of the fault status in a timely manner through reminder information, but also maintains the basic operating capacity of the air source system by relying on adaptive adjustment, reducing the system downtime caused by the fault and ensuring the continuity of equipment operation. Therefore, this technical solution effectively balances the safety of fault handling with the stability of system operation through the logic of "graded judgment - on-demand handling", improves the intelligence and efficiency of equipment fault response, and reduces the negative impact of faults on the overall system operation.

[0062] Upon receiving an early warning, maintenance personnel can bring repair tools and spare parts to the fault site and conduct repairs based on the fault type and location indicated in the warning. For example, when dealing with a leak in the purging tank pipeline, first close the purging tank's inlet valve, remove the sealing gasket at the flange connection, replace it with a new high-pressure resistant sealing gasket (made of fluororubber), retighten the flange bolts, and then open the inlet valve to conduct a pressure test. When dealing with filter bag blockage, adjust the purging frequency from 6 times / min to 8 times / min, and replace severely blocked filter bags. After the fault is resolved, maintenance personnel enter the maintenance record through the host computer configuration software, including fault handling time, maintenance content, and the model of the replaced spare parts. The controller re-collects parameters; if the parameters return to the normal range, the warning is automatically lifted, and the system returns to normal monitoring status; if the parameters are still abnormal, the warning is triggered again, prompting maintenance personnel to re-investigate. Furthermore, to ensure long-term stable system operation, regular maintenance can be performed. For example, each sensor is calibrated quarterly to check for loose wiring and damaged casings; data transmission lines and data acquisition terminals are inspected semi-annually to clean dust and check network connection stability; and the centralized controller and cloud server are maintained annually to clean historical redundant data and back up fault records and operational data. Simultaneously, the historical data statistical analysis function of the cloud server is used to identify patterns in fault occurrences. For instance, if a pulse valve in a certain area repeatedly experiences response delays, the power supply voltage of the pulse valve in that area can be adjusted or a higher-performance solenoid valve can be replaced; if dust concentration frequently exceeds the standard during peak production periods, the blowing frequency parameters can be optimized to automatically increase the blowing frequency during peak production periods, further improving the dust removal effect.

[0063] This embodiment also provides a fault monitoring method, which uses the above-mentioned fault monitoring system to monitor the faults of the injection device of the high tower granulation tail gas purification system.

[0064] Those skilled in the art will easily understand the working principle and beneficial effects of the fault detection method by reading the above system. For the sake of brevity, further details will not be elaborated here.

[0065] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0066] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0067] In the several embodiments provided by this invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0068] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0069] Similarly, it should be understood that, in order to streamline the invention and aid in understanding one or more of the various aspects of the invention, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the invention. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with fewer features than all of those in a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0070] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or elements of any method or apparatus so disclosed may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0071] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0072] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some modules in the electronic device according to embodiments of the present invention. The present invention can also be implemented as an apparatus program (e.g., a computer program and computer program product) for performing some or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0073] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0074] The above description is merely a specific embodiment of the present invention or an explanation of that embodiment. The scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fault monitoring system, characterized in that, This device is used for fault monitoring of the pulse jet cleaning device in a high-tower granulation tail gas purification system. The tail gas purification system includes an inlet pipe, a bag filter assembly, and an outlet pipe connected in sequence. The pulse jet cleaning device includes an air storage tank, an air collection box, a pulse valve, and a pulse jet pipe. The air storage tank is connected to the air collection box via an air supply pipe. The inlet of the pulse valve is connected to the air collection box, and the outlet is connected to the pulse jet pipe. The pulse jet pipe is equipped with multiple pulse jet nozzles, and each of the multiple pulse jet nozzles corresponds one-to-one with a multiple filter bag in the bag filter assembly. The fault monitoring system includes a device sensing component and a controller. The device sensing component is used to acquire at least the operating parameters of the blowing device, and the controller is used to determine the fault condition of the blowing device based at least on the operating parameters acquired by the device sensing component. The device sensing components include a first pressure sensor disposed in the gas storage tank, a second pressure sensor disposed in the gas collection box, and a third pressure sensor disposed at the inlet of the pulse valve; the operating parameters include a first pressure value detected by the first pressure sensor, a second pressure value detected by the second pressure sensor, and a third pressure value detected by the third pressure sensor. Wherein, when the operating parameters meet the first parameter condition, the controller determines that the fault condition is a pipeline leak between the gas collection box and the pulse valve; the first parameter condition includes: the first pressure value is within a first preset pressure range, the second pressure value is lower than the lower limit of the second preset pressure range, and the third pressure value is lower than the lower limit of the third preset pressure range.

2. The system according to claim 1, characterized in that, The device sensing component further includes a fourth pressure sensor disposed at the outlet of the pulse valve; the operating parameters further include a fourth pressure value detected by the fourth pressure sensor; the first parameter condition further includes that when the blowing device is not blowing, the fourth pressure value is less than a pressure threshold.

3. The system according to claim 2, characterized in that, When the operating parameters meet the second parameter condition, the controller determines that the fault condition is a pulse valve fault; the second parameter condition is: the first pressure value is within the first preset pressure range, the second pressure value is within the second preset pressure range, the third pressure value is within the third preset pressure range, and the difference between the maximum value of the fourth pressure value collected during the blowing process of the blowing device and the third pressure value is greater than the differential pressure threshold.

4. The system according to claim 3, characterized in that, The device sensing component further includes a pulse state sensor disposed on the pulse valve; the pulse state sensor is used to detect the coil on / off action signal of the pulse valve; the operating parameters also include the on / off action signal detected by the pulse state sensor; wherein, when the fault condition is a pulse valve fault, if the on / off action signal is detected during the blowing process of the blowing device, the pulse valve fault is that the pulse valve is stuck or blocked; if the on / off action signal is not detected during the blowing process of the blowing device, the pulse valve fault is that the electrical control circuit of the pulse valve is faulty.

5. The system according to claim 1, characterized in that, When the operating parameters meet the third parameter condition, the controller determines that the fault condition is a gas source fault of the gas storage tank. The third parameter condition includes: the first pressure value is not within the first preset pressure range; or, within a first preset time period, the fluctuation range of the first pressure value is greater than the first amplitude threshold, the fluctuation range of the second pressure value is greater than the second amplitude threshold, and the fluctuation range of the third pressure value is greater than the third amplitude threshold.

6. The system according to any one of claims 1-5, characterized in that, After determining the fault condition, the controller is further configured to: determine the fault level, and perform corresponding fault handling operations according to the fault level; The fault levels include Level 1 faults and Level 2 faults. Level 1 faults include pipeline leaks and pulse valve malfunctions, while Level 2 faults include gas source malfunctions. The fault handling operations corresponding to Level 1 faults include stopping the blowing device and sending alarm information. The fault handling operations corresponding to Level 2 faults include sending reminder information and performing adaptive adjustment operations based on the fault conditions. Preferably, when the secondary fault is an air source fault, the adaptive adjustment operation is to adjust the loading frequency of the air compressor connected to the air tank.

7. The system according to claim 1, characterized in that, When the operating parameters meet the fourth parameter condition, the controller determines that the fault condition is a leak in the gas collection box pipeline. The fourth parameter condition is: within the second preset time period, the decrease in the second pressure value is greater than the fourth amplitude threshold and the first pressure value decreases synchronously.

8. The system according to claim 1, characterized in that, The device sensing components also include a flow sensor and a dust concentration sensor, the flow sensor being disposed on the gas supply pipeline and the dust concentration sensor being disposed on the gas outlet pipeline; the exhaust gas purification system includes a differential pressure gauge for measuring system resistance; the operating parameters include the flow rate value detected by the flow sensor and the dust concentration value detected by the dust concentration sensor; Wherein, when the operating parameters meet the fifth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is that the blowing frequency of the blowing device is insufficient; the fifth parameter condition is: the dust concentration value is continuously higher than the first dust threshold, and the flow rate value is within the preset flow rate range; Wherein, when the operating parameters meet the sixth parameter condition and the system resistance detected by the differential pressure gauge exceeds the upper limit of the preset resistance range, the controller determines that the fault condition is insufficient supply of the blowing medium of the blowing device; the sixth parameter condition is: the dust concentration value is continuously lower than the second dust threshold and the flow rate value is within the preset flow rate range; the second dust threshold is lower than the first dust threshold.

9. The system according to claim 1, characterized in that, The fault monitoring system also includes a host computer; the host computer is connected to the controller to display the operating parameters acquired by the controller.

10. A fault monitoring method, characterized in that, The fault monitoring system described in any one of claims 1-9 is used to monitor the faults of the jetting device of the high-tower granulation tail gas purification system.

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