Anti-blocking nuclear island pit pump and wastewater treatment method

Abstract

The invention discloses an anti-blocking nuclear island pit pump and a wastewater treatment method, and relates to the technical field of pit pumps. Solid particles with different particle sizes can be effectively intercepted by performing three-stage gradient filtering interception on waste water containing the solid particles, the internal cleaning filter screen is matched with the high-pressure water nozzle to realize automatic flushing, the removal rate of small-particle impurities attached in filter screen pores is increased, the overload risk of the pit pump caused by filter screen blockage is remarkably reduced, and the service life of the pit pump is prolonged. The auxiliary cleaning monitoring module collects data in real time through various sensors, can accurately predict the blocking trend of a filter screen, starts a pre-cleaning program in advance, and meanwhile dynamically adjusts a cleaning strategy according to the particle proportion to achieve dynamic matching of the filtering precision and the cleaning strength, spiral flow guide ribs on the inner wall of the conveying pipeline guide water flow to form a spiral flow state, and the cleaning effect is improved. The energy consumption is controlled while the scouring effect is guaranteed, linkage of directional impurity conveying and pipeline self-cleaning is achieved, the equipment failure-free operation period is prolonged, and the operation and maintenance cost and the nuclear island safety risk are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sump pumps, and particularly to a clogging - proof nuclear island sump pump and a wastewater treatment method. Background Technique

[0002] In nuclear power engineering, the nuclear island sump pump is one of the essential equipment, mainly used for transporting wastewater containing solid particles in the nuclear island sump. However, when the existing nuclear island sump pumps face wastewater containing solid particles, there are many problems. For example, their filtering devices often cannot effectively intercept solid particles of different particle sizes, easily leading to the clogging of the filter screen, which in turn affects the normal operation of the pump, and may even cause the pump to be overloaded and damaged due to clogging. At the same time, there are no effective means for real - time monitoring and control of the operating states of the pump and the filtering device, making it difficult to detect potential problems in advance and take timely measures. This not only increases the maintenance cost but also poses certain safety hazards and cannot meet the requirements of the nuclear island environment for high reliability and safety of equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a clogging - proof nuclear island sump pump and a wastewater treatment method. By means of three - level gradient filtration, the filtration efficiency and clogging - proof ability are improved. The auxiliary cleaning monitoring module conducts real - time monitoring and control, accurately predicts the clogging trend of the filter screen, realizes intelligent adaptive maintenance, and the spiral flow state transportation and the silt - cleaning and reflux device work together to effectively delay the pipeline wear process, and realizes the linkage of impurity directional transportation and pipeline self - cleaning, so as to solve the problems raised in the above - mentioned background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A clogging - proof nuclear island sump pump, including a sump pump body. One side inlet of the sump pump body is connected to a filter chamber, and the other side outlet of the sump pump body is connected to a conveying pipeline. One side of the filter chamber is connected to a silt - cleaning and reflux device, and one side of the silt - cleaning and reflux device is connected to the conveying pipeline. The filter chamber is electrically connected to an auxiliary cleaning monitoring module, and the auxiliary cleaning monitoring module conducts real - time monitoring and control on the filter chamber and the sump pump body.

[0006] Further, the filter chamber includes a grille filter screen, a woven filter screen, and an inner cleaning filter screen. The grille filter screen is arranged in a conical diffusion shape and is fixedly connected to the filter chamber by clamping. One side of the filter chamber is provided with a filtering port, and one side of the filtering port is fixedly connected to the woven filter screen and the inner cleaning filter screen by bolts. The woven filter screen is arranged in a "C" shape, and the inner cleaning filter screen is installed on the opening side of the woven filter screen.

[0007] Furthermore, a self-cleaning rotating roller is provided on one side of the internal cleaning filter screen. The self-cleaning rotating roller is rotatably connected to the inner wall of the inlet on one side of the sump pump body. The surface of the self-cleaning rotating roller is equipped with evenly distributed high-pressure water nozzles. One side of the self-cleaning rotating roller is fixedly connected to the output shaft of the drive motor. The drive motor is fixed to the inlet on one side of the sump pump body by bolts. A water inlet is provided on one side of the drive motor. The water inlet is connected to one side of the delivery pipe through a pipe.

[0008] Furthermore, the sludge removal and return device includes a sewage discharge component and a return component. One end of the sewage discharge component is connected to one side of the filter chamber via a flange and is used to transport wastewater containing solid particles. The return component is installed at the end of the sewage discharge component near the filter chamber. An electromagnetic flow valve and a check valve are installed on the return branch pipe. One end of the return component is connected to the conveying pipeline via the return branch pipe. The inner wall of the conveying pipeline is provided with guide ridges that are spirally distributed along the water flow direction.

[0009] Furthermore, the auxiliary cleaning monitoring module includes:

[0010] The data acquisition and processing unit is configured to acquire data from various sensors in real time, preprocess the data, and generate real-time status parameters including filter pressure difference, equipment vibration value, pipeline wear amount, and slag storage amount.

[0011] The remote monitoring and control unit is configured to perform fault diagnosis based on the acquired real-time status parameters and adjust the parameters of each control terminal based on the fault diagnosis results.

[0012] The communication unit is configured to upload real-time status parameters and fault warning information to the cloud monitoring platform, and remotely retrieve the operating data of each device via a mobile terminal. At the same time, it can manually control the start and stop of each control terminal via a mobile terminal.

[0013] This invention provides another technical solution: a wastewater treatment method for preventing clogging of nuclear island sump pumps, comprising the following steps:

[0014] Multi-stage gradient filtration and interception: Wastewater containing solid particles is filtered and intercepted in three stages through the grid filter, woven filter and internal cleaning filter in the filter chamber.

[0015] Adaptive cleaning and maintenance: Based on real-time monitoring data from the auxiliary cleaning monitoring module, real-time status parameters are generated and fault diagnosis is performed to conduct adaptive cleaning and maintenance of the filtration system;

[0016] Spiral flow conveying: The filtered wastewater is conveyed in a spiral flow manner through the conveying pipeline, and the operating frequency of the sump pump body is adjusted based on the flow sensor data;

[0017] Intelligent sludge dredging and recirculation: The sludge dredging and recirculation device enables the directional transport of wastewater containing solid particles and the control of the recirculation of filtered wastewater.

[0018] Furthermore, multi-level gradient filtering interception also includes:

[0019] The pressure sensor installed in the filter chamber continuously collects the pressure difference data on both sides of each filter screen. The collected pressure difference data is input into the preset particle size pressure difference correlation model to calculate the proportion of particles in each particle size range in the current wastewater.

[0020] When the calculated proportion of large particles exceeds the threshold for large particle proportion, the cleaning cycle of the woven filter screen is shortened; when the proportion of small particles exceeds the threshold for small particle proportion, the flushing pressure of the high-pressure water nozzle is increased.

[0021] Furthermore, adaptive cleaning and maintenance specifically includes:

[0022] Based on the auxiliary cleaning monitoring module, the filter screen pressure difference change rate, the vibration frequency data of the sump pump body and sewage discharge components are collected at the preset collection frequency. At the same time, the filter screen pressure difference decrease after each high-pressure water nozzle flush is obtained as flushing effect data.

[0023] The collected data on filter pressure difference change rate, vibration frequency, and rinsing effect are preprocessed to generate a standardized time series dataset.

[0024] The preprocessed time series dataset is input into a preset trend prediction framework according to a preset time length, and the feature change trend within the continuous time period is extracted to construct a filter clogging trend prediction model.

[0025] Obtain the prediction results of the filter clogging trend prediction model. When the prediction result is that the probability of the filter pressure difference exceeding the target pressure difference within a certain period of time is greater than the preset probability threshold, send a pre-cleaning command to the drive motor and each control terminal.

[0026] The drive motor drives the self-cleaning rotating roller to rotate at a preset multiple of higher than the normal speed. At the same time, the pressure of the high-pressure water nozzle is increased in multiple steps from the initial pressure value. Each step increases the preset pressure value and maintains it for a preset time, and finally stabilizes at the target pressure range. After rinsing for a preset time, the normal parameters are restored.

[0027] If the filter pressure difference drops more than the preset drop percentage threshold within a certain period after pre-cleaning, the interval between the next pre-cleaning trigger will be extended to the preset duration.

[0028] Furthermore, adaptive cleaning and maintenance also includes:

[0029] After each pre-cleaning operation is completed, the deviation data between the actual filter pressure difference change curve and the predicted curve is obtained, and the deviation data and the execution parameters of this cleaning operation are integrated into the model optimization dataset.

[0030] Using a preset cycle as the unit, the weights of each feature in the filter clogging trend prediction model are iteratively adjusted based on newly added cleaning operation data and cleaning feedback data.

[0031] Furthermore, spiral flow conveying specifically includes:

[0032] Based on the flow sensor and ultrasonic thickness sensor inside the pipeline, real-time flow data and wear rate data of each pipeline are collected in real time.

[0033] The flow rate data and wear rate data are associated and stored to form a transport status dataset that includes timestamps, flow values, pipeline location coordinates and corresponding wear rates;

[0034] Obtain the physical structural parameters of the spiral guiding ridge, construct a virtual guiding model, and combine real-time flow data to obtain the turbulence intensity and scouring force distribution of the current spiral flow state;

[0035] When the local wear rate of the pipeline is detected to exceed the preset wear rate threshold, the flow characteristics and wear data of the corresponding area are extracted, and the equivalent flow coefficient in the virtual flow guiding model is dynamically calibrated.

[0036] The optimal water flow velocity range is calculated based on the calibrated virtual flow guide model. The water flow velocity is stabilized within the optimal range by adjusting the operating frequency of the sump pump body, so that the spiral water flow can scour the worn parts in a directional manner.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] The anti-clogging nuclear island sump pump proposed in this invention adopts a modular three-layer filter structure to sequentially filter and intercept wastewater containing solid particles in three stages. It can effectively intercept solid particles of different sizes. The internal cleaning filter, together with the high-pressure water nozzle, realizes automatic flushing, which improves the removal rate of small particulate impurities attached to the filter pores and significantly reduces the risk of sump pump overload caused by filter clogging. The auxiliary cleaning monitoring module collects data in real time through multiple sensors, which can accurately predict the filter clogging trend and start the pre-cleaning program in advance. At the same time, it dynamically adjusts the cleaning strategy according to the particle ratio to achieve dynamic matching between filtration accuracy and cleaning intensity. The spiral guide ridges on the inner wall of the conveying pipe guide the water flow to form a spiral flow pattern, which controls energy consumption while ensuring flushing effect, effectively delays the pipe wear process, realizes the linkage between impurity directional transport and pipe self-cleaning, extends the fault-free operation cycle of the equipment, and significantly reduces operation and maintenance costs and nuclear island safety risks. Attached Figure Description

[0039] Figure 1 This is an isometric view of the anti-clogging nuclear island sump pump of the present invention;

[0040] Figure 2This is a schematic diagram of the internal isometric view of the filter chamber of the present invention;

[0041] Figure 3 This is a top cross-sectional view of the filter chamber of the present invention;

[0042] Figure 4 This is an isometric view of the dredging and reflux device of the present invention;

[0043] Figure 5 This is a flowchart of the wastewater treatment method for the anti-clogging nuclear island sump pump of the present invention.

[0044] In the diagram: 1. Sump pump body; 2. Filter chamber; 21. Grille filter; 22. Woven filter; 23. Internal cleaning filter; 231. Self-cleaning rotating roller; 232. High-pressure water nozzle; 233. Drive motor; 234. Water inlet; 3. Conveying pipeline; 4. Dredging and return device; 41. Sewage discharge assembly; 42. Return assembly; 43. Return branch pipe. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] For the technical issues to be addressed, please refer to Figures 1-4 This embodiment provides the following technical solution:

[0047] The anti-clogging nuclear island sump pump includes a sump pump body 1. One inlet of the sump pump body 1 is connected to a filter chamber 2 to intercept solid particulate impurities in wastewater. The other outlet of the sump pump body 1 is connected to a conveying pipeline 3. It has a structural design to reduce water flow impact and reduce particle wear. One side of the filter chamber 2 is connected to a sludge return device 4, and one side of the sludge return device 4 is connected to the conveying pipeline 3. The filter chamber 2 is electrically connected to an auxiliary cleaning monitoring module, which performs real-time monitoring and control of the filter chamber 2 and the sump pump body 1.

[0048] In this embodiment, the sump pump body 1 is a model with high hydraulic performance, which can adapt to the conveying environment of wastewater containing solid particles in the nuclear island sump. The connection between the sump pump body 1, the filter chamber 2, and the conveying pipeline 3 is all through flange connection, and the sealing performance of the connection has been strictly tested to ensure that there will be no leakage during long-term operation, thus ensuring the safety of the nuclear island environment.

[0049] In this embodiment, the filter chamber 2 includes a modular three-layer filter screen structure, which is nested inside the filter chamber 2, including a grille filter screen 21, a woven filter screen 22, and an inner cleaning filter screen 23. The grille filter screen 21 is arranged in a conical diffusion shape and is snap-fixed to the filter chamber 2. The inner wall of the filter chamber 2 is provided with a guide plate that engages with the grille filter screen 21, and a sealing strip is provided at the connection. One side of the filter chamber 2 is provided with a filter port, and one side of the filter port is fixedly connected to the woven filter screen 22 and the inner cleaning filter screen 23 by bolts. The woven filter screen 22 is arranged in a "C" shape, and the inner cleaning filter screen 23 is installed on the opening side of the woven filter screen 22.

[0050] In this embodiment, the wastewater containing solid particles is filtered through the three-layer filter screen structure, and solid particles with a diameter greater than 8 mm can be intercepted, such as metal debris, concrete blocks, etc. The conical diffusion design of the grille filter screen 21 effectively reduces the water flow impact resistance and energy consumption. The surface of the woven filter screen 22 is sprayed with a polytetrafluoroethylene coating to reduce impurity adhesion. The inner cleaning filter screen 23 further filters small particle impurities and cooperates with the high-pressure water nozzle 232 to achieve automatic flushing. It rotates once every 30 minutes, and the intercepted small particle impurities are washed into the bypass sewage pipe to avoid filter screen blockage.

[0051] In this embodiment, a self-cleaning rotating roller 231 is provided on one side of the inner cleaning filter screen 23. The self-cleaning rotating roller 231 is rotatably connected to the inner wall of the inlet on one side of the sump pump body 1. The surface of the self-cleaning rotating roller 231 is equipped with uniformly distributed high-pressure water nozzles 232 with a pressure range of 0.3 - 0.5 MPa. One side of the self-cleaning rotating roller 231 penetrates and is fixedly connected to the output shaft of the drive motor 233. The drive motor 233 is fixed to the inlet on one side of the sump pump body 1 by bolts. One side of the drive motor 233 is provided with a water inlet 234, and the water inlet 234 is connected to one side of the conveying pipeline 3 through a pipeline.

[0052] In this embodiment, the bottom of the filter chamber 2 is connected to a bypass sewage pipe, and the small particle impurities intercepted by the inner cleaning filter screen 23 can be washed into the bypass sewage pipe. The filter chamber 2 and the inlet of the sump pump body 1 are connected by a flange, and a radiation-resistant fluororubber sealing ring is provided at the connection;

[0053] In this embodiment, the drive motor 233 drives the self-cleaning rotating roller 231 to rotate. At the same time, the water in the conveying pipeline 3 is conveyed into the self-cleaning rotating roller 231, and the high-pressure water nozzles 232 on the self-cleaning rotating roller 231 wash the inner cleaning filter screen 23 on one side, avoiding the blockage of the inner cleaning filter screen and improving the filtration efficiency. The system's internal water flow is directly used as the flushing water source without additional water supply equipment, reducing energy consumption. Through dynamic rotary flushing and pressure adjustment, the clearance rate of small particle impurities attached in the pores of the filter screen is increased, significantly reducing the risk of sump pump overload caused by filter screen blockage;

[0054] In this embodiment, the sludge removal and recirculation device 4 includes a sludge discharge component 41 and a recirculation component 42. One end of the sludge discharge component 41 is connected to one side of the filter chamber 2 via a flange, and a radiation-resistant fluororubber sealing ring is provided at the connection point to ensure nuclear-grade sealing reliability and facilitate disassembly and maintenance. It is used to transport wastewater containing solid particles. The recirculation component 42 is installed at the end of the sludge discharge component 41 near the filter chamber 2. An electromagnetic flow valve and a check valve are installed on the recirculation branch pipe 43. The electromagnetic flow valve precisely controls the recirculation ratio, and the check valve prevents reverse recirculation. One end of the recirculation component 42 is connected to the conveying pipeline 3 through the recirculation branch pipe 43. The inner wall of the conveying pipeline 3 is provided with guide ridges distributed in a spiral shape along the water flow direction to guide the water flow to form a spiral flow state, enhance the scouring force of the water flow on the inner wall of the pipeline, and reduce the deposition of impurities in the pipeline. The sludge discharge and recirculation functions work together to realize the directional transport of impurities and the linkage of pipeline self-cleaning, which extends the fault-free operation cycle of the equipment and significantly reduces operation and maintenance costs and nuclear island safety risks.

[0055] In this embodiment, the auxiliary cleaning monitoring module includes:

[0056] The data acquisition and processing unit is electrically connected to the pressure sensor installed at the bottom of the filter chamber 2, the vibration sensor on the sewage discharge component 41, the ultrasonic thickness sensor on the outer wall of the conveying pipe 3, and the material level sensor in the slag storage box in the filter chamber 2. It is configured to acquire data from each sensor in real time, and perform preprocessing such as filtering and noise reduction on the data to generate real-time status parameters including filter screen pressure difference, equipment vibration value, pipe wear amount, and slag storage amount.

[0057] The remote monitoring and control unit is configured to perform fault diagnosis based on the acquired real-time status parameters, and adjust the parameters of various control terminals such as the sump pump body 1, electromagnetic flow valve, and drive motor 233 based on the fault diagnosis results, including automatically adjusting the operating frequency of the sump pump body 1 based on the concentration of impurities in the influent.

[0058] The communication unit is configured to upload real-time status parameters and fault warning information to the cloud monitoring platform, and remotely retrieve the operating data of each device via a mobile terminal. At the same time, it can manually control the start and stop of each control terminal via a mobile terminal. It has the functions of historical data storage and trend analysis, and can predict the filter replacement cycle and pipeline maintenance time based on the operating data of the past 30 days.

[0059] In this embodiment, when the auxiliary cleaning monitoring module detects that the vibration value of the sump pump body 1 exceeds the preset threshold, it automatically controls the electromagnetic flow valve installed on the return branch pipe 43 to open, spraying a fan-shaped water flow to the inlet of the filter chamber 2 with a coverage angle of 120°, so as to remove any impurities that may be attached to the sewage discharge component 41 in a timely manner and prevent the vibration from being aggravated due to local blockage. At the same time, when the pressure difference between the front and back of the filter screen of the filter chamber 2 exceeds 0.05MPa, the monitoring and control unit 52 will automatically control the self-cleaning rotating roller 231 on one side of the inner cleaning filter screen 23 to enter the high-intensity flushing mode, increase the pressure of the high-pressure water nozzle 232 to 0.8MPa, and send a cleaning warning to the terminal of the person in charge through the Internet of Things. When the material level in the slag storage box reaches 80%, the compressed air injection device is activated to compact the impurities and send a cleaning warning.

[0060] For a better demonstration of the anti-clogging nuclear island sump pump, please refer to [link / reference]. Figure 5 This invention provides a wastewater treatment method for preventing clogging of nuclear island sump pumps, comprising the following steps:

[0061] Multi-stage gradient filtration: Wastewater containing solid particles is filtered and intercepted in three stages through the grid filter 21, woven filter 22, and internal cleaning filter 23 within the filter chamber 2. This also includes:

[0062] The pressure sensor installed in the filter chamber 2 continuously collects the pressure difference data on both sides of each filter screen. The collected pressure difference data is input into the preset particle size pressure difference correlation model to calculate the proportion of particles in each particle size range in the current wastewater.

[0063] When the calculated proportion of particles with a diameter of 2-8mm exceeds 30%, the cleaning cycle of the woven filter screen 22 is shortened because larger particles are more likely to clog the screen. This ensures timely cleaning of the screen and maintains filtration efficiency. When the proportion of particles with a diameter of less than 2mm exceeds 40%, the flushing pressure of the high-pressure water nozzle 232 is increased because small particles are more likely to adhere to the pores of the screen. This achieves a dynamic match between filtration accuracy and cleaning intensity.

[0064] In this embodiment, the preset particle size and pressure difference correlation model collects pressure difference data before and after the filter under various working conditions through pressure sensors, forming a dataset containing particle size distribution vector, flow velocity parameters, filter material parameters and pressure difference data. With particle size distribution as the dependent variable and pressure difference data, flow velocity and filter parameters as independent variables, a nonlinear mapping relationship is constructed by minimizing the mean square error. The parameters are iteratively optimized by combining actual engineering data, and finally a dynamically calibrated particle size and pressure difference correlation model is established.

[0065] In this embodiment, the wastewater first enters the grid filter screen 21. Using its conical diffusion structure, it intercepts solid particles with a diameter greater than 8 mm, achieving primary interception of large particle impurities while reducing the impact resistance of the water flow. The wastewater after primary filtration enters the woven filter screen 22. The filter screen is arranged in a "C" shape and is fixed to the filter port of the filter chamber 2 by bolts. The polytetrafluoroethylene coating sprayed on its surface reduces impurity adhesion and intercepts medium particle impurities with a diameter of 2 - 8 mm. Finally, fine filtration is carried out through the inner cleaning filter screen 23. This filter screen is installed on one side of the opening of the woven filter screen 22 to intercept small particle impurities with a diameter less than 2 mm, forming a complete gradient filtration system;

[0066] Adaptive cleaning and maintenance: Generate real-time status parameters based on the real-time monitoring data of the auxiliary cleaning monitoring module, perform fault diagnosis, and carry out adaptive cleaning and maintenance on the filtration system;

[0067] Spiral flow state transportation: The filtered wastewater is transported in a spiral flow state through the transportation pipeline 3, and the operating frequency of the sump pump body 1 is adjusted based on the flow sensor data;

[0068] Intelligent sludge cleaning and reflux: Through the sludge cleaning and reflux device 4, the directional transportation of wastewater containing solid particles and the reflux control of the filtered wastewater are realized.

[0069] In this embodiment, through multi-stage gradient filtration interception, the three-stage filter screens have clear division of labor, forming an efficient interception system, reducing the wear of large, medium, and small particles on subsequent equipment. The adaptive cleaning and maintenance is dynamically adjusted based on real-time monitoring data, and cleaning is carried out in advance through model prediction to avoid shutdown caused by filter screen blockage and extend the life of the filter screen. The spiral flow state transportation uses the guide ridges to guide the water flow, enhancing the scouring force and reducing sedimentation. Combined with the pump frequency adjustment, the pipeline wear rate is reduced. The intelligent sludge cleaning and reflux realizes the directional transportation of impurities and the reflux control of wastewater, improving the anti-blocking ability of the system and enhancing the overall operation stability.

[0070] In this embodiment, the adaptive cleaning and maintenance specifically includes:

[0071] Based on the auxiliary cleaning monitoring module, collect the data of the differential pressure change rate of the filter screen, the vibration frequency data of the sump pump body 1 and the sewage discharge component 41 at the preset acquisition frequency. At the same time, obtain the data of the differential pressure drop amplitude of the filter screen after each high-pressure water nozzle 232 flushing as the flushing effect data;

[0072] Preprocess the collected differential pressure change rate of the filter screen, vibration frequency data and flushing effect data to generate a standardized time series data set. Among them, the differential pressure change rate of the filter screen is calculated by the differential pressure increment per hour, the vibration frequency takes the average value within 1 minute, and the flushing effect data is expressed as the ratio of the differential pressure difference before and after flushing to the initial differential pressure;

[0073] The preprocessed time series dataset is input into the preset trend prediction framework according to the preset time length. With time as the axis, the filter pressure difference change rate, vibration frequency and flushing effect data are used as input features. The feature change trend within the continuous time period is extracted by the sliding window method to construct the filter clogging trend prediction model.

[0074] The model parameters are trained and optimized using feature data corresponding to historical congestion events, so that the congestion prediction accuracy within 4 hours reaches a preset threshold or higher.

[0075] Obtain the prediction results of the filter clogging trend prediction model. When the prediction result is that the probability of the filter pressure difference exceeding the target pressure difference within a certain period of time is greater than the preset probability threshold, send a pre-cleaning command to the drive motor 233 and each control terminal.

[0076] The drive motor 233 drives the self-cleaning rotating roller 231 to rotate at a preset multiple of higher than the normal speed. At the same time, the pressure of the high-pressure water nozzle 232 is increased in multiple steps from the initial pressure value. Each step increases the preset pressure value and maintains it for a preset time, eventually stabilizing at the target pressure range. After continuous rinsing for a preset time, the normal parameters are restored. For example, if the filter pressure difference may exceed 0.05MPa within 4 hours, the high-intensity pre-cleaning program is started in advance. The self-cleaning rotating roller 231 is controlled to rotate at 1.2 times the normal speed, and the pressure of the high-pressure water nozzle 232 is increased in steps to 0.6-0.7MPa to remove attached impurities in advance and delay the occurrence of blockage.

[0077] If the filter pressure difference drops more than the preset drop percentage threshold within a certain period after pre-cleaning, the interval between the next pre-cleaning triggers will be extended to the preset duration.

[0078] After each pre-cleaning operation is completed, the deviation data between the actual filter pressure difference change curve and the predicted curve is obtained, and the deviation data and the execution parameters of this cleaning operation, including but not limited to rotation speed, pressure, duration, etc., are integrated into the model optimization dataset.

[0079] Using a preset cycle as the unit, the weights of each feature in the filter clogging trend prediction model are iteratively adjusted based on newly added cleaning operation data and cleaning feedback data, so that the prediction deviation is controlled within the allowable error range, thereby ensuring the adaptability and prediction accuracy of the model.

[0080] In this embodiment, a filter clogging trend prediction model based on multi-parameter dynamic analysis is established. The filter pressure difference change rate, equipment vibration frequency, and flushing effect data are integrated to construct time series features. Combined with sliding window trend extraction technology, the probability of clogging within 4 hours is accurately predicted, effectively improving the prediction accuracy. A pre-cleaning strategy of stepped pressure increase and adaptive speed adjustment is adopted. When the risk of clogging is predicted, a high-intensity cleaning program is initiated in advance, reducing the occurrence rate of filter pressure difference exceeding the limit and effectively extending the service life of the filter. The model parameters are iteratively optimized by real-time feedback deviation data, forming an adaptive closed-loop control of prediction-cleaning-feedback-optimization. This significantly improves the operational stability of the nuclear island sump pump under complex working conditions and reduces the frequency of manual intervention.

[0081] In this embodiment, the spiral flow conveying specifically includes:

[0082] Based on the flow sensor and ultrasonic thickness sensor inside the conveying pipeline 3, real-time flow data and wear rate data of each pipeline are collected in real time.

[0083] The flow rate data and wear rate data are associated and stored to form a transport status dataset that includes timestamps, flow values, pipeline location coordinates and corresponding wear rates;

[0084] Obtain the physical structural parameters of the spiral guiding ridge, including pitch, height, and direction of rotation, construct a virtual guiding model, and combine real-time flow data to obtain the turbulence intensity and scouring force distribution of the current spiral flow state;

[0085] When the local wear rate of the pipeline is detected to exceed the preset wear rate threshold, the flow characteristics and wear data of the corresponding area are extracted, and the equivalent flow coefficient in the virtual flow guiding model is dynamically calibrated so that the simulated scouring force output by the model is consistent with the actual wear trend.

[0086] The optimal water flow velocity range is calculated based on the calibrated virtual flow guide model. With the constraint that "the scouring force of the wear parts is increased by 15%-20% and the overall energy consumption increase does not exceed 8%", the water flow velocity is stabilized within the optimal water flow velocity range by adjusting the operating frequency of the sump pump body 1. This allows the spiral water flow to scour the wear parts in a directional manner, increasing the scouring force by 15%-20%, while avoiding the increase in energy consumption caused by excessive scouring.

[0087] In this embodiment, a dynamically calibrated virtual flow guiding model is constructed by combining the spiral flow guiding ridge structure with real-time flow rate and wear rate data to achieve precise control of the spiral flow state. Through correlation analysis of wear rate and flow characteristics, the equivalent flow guiding coefficient is dynamically optimized, which significantly improves the model's prediction accuracy of scouring force distribution. When local wear exceeds the standard, the operating frequency of the sump pump is intelligently adjusted based on constraints to form a directional scouring effect, effectively delaying the pipeline wear process, extending the pipeline service life, significantly improving the adaptability of the nuclear island sump pump in complex media transportation environments, and reducing maintenance costs.

[0088] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A clogging-resistant nuclear island sump pump, characterized in that, It includes a sump pump body (1). One side inlet of the sump pump body (1) is connected to a filtration chamber (2), and the other side outlet of the sump pump body (1) is connected to a conveying pipeline (3). One side of the filtration chamber (2) is connected to a dredging and reflux device (4), and one side of the dredging and reflux device (4) is connected to the conveying pipeline (3). The filtration chamber (2) is electrically connected to an auxiliary cleaning and monitoring module, and the auxiliary cleaning and monitoring module monitors and controls the filtration chamber (2) and the sump pump body (1) in real time.

2. The anti-clogging nuclear island sump pump as described in claim 1, characterized in that, The filtration chamber (2) includes a grille filter screen (21), a woven filter screen (22) and an inner cleaning filter screen (23). The grille filter screen (21) is arranged in a conical diffusion shape and is fixedly connected to the filtration chamber (2) by clamping. One side of the filtration chamber (2) is provided with a filtration port, and one side of the filtration port is fixedly connected to the woven filter screen (22) and the inner cleaning filter screen (23) by bolts. The woven filter screen (22) is arranged in a "C" shape, and the inner cleaning filter screen (23) is installed on the opening side of the woven filter screen (22).

3. The anti-clogging nuclear island sump pump as described in claim 2, characterized in that, One side of the inner cleaning filter screen (23) is provided with a self-cleaning rotating roller (231). The self-cleaning rotating roller (231) is rotatably connected to the inner wall of the inlet on one side of the sump pump body (1). The surface of the self-cleaning rotating roller (231) is equipped with evenly distributed high-pressure water nozzles (232). One side of the self-cleaning rotating roller (231) penetrates and is fixedly connected to the output shaft of a driving motor (233). The driving motor (233) is fixed to the inlet on one side of the sump pump body (1) by bolts. One side of the driving motor (233) is provided with a water inlet (234), and the water inlet (234) is connected to one side of the conveying pipeline (3) through a pipeline.

4. The anti-clogging nuclear island sump pump as described in claim 3, characterized in that, The dredging and reflux device (4) includes a sewage discharge component (41) and a reflux component (42). One end of the sewage discharge component (41) is connected to one side of the filtration chamber (2) by a flange for transporting wastewater containing solid particles. The reflux component (42) is installed at one end of the sewage discharge component (41) close to the filtration chamber (2). An electromagnetic flow valve and a check valve are installed on the reflux branch pipe (43). One end of the reflux component (42) is connected to the conveying pipeline (3) through the reflux branch pipe (43). The inner wall of the conveying pipeline (3) is provided with guiding convex ridges distributed in a spiral shape along the water flow direction.

5. The anti-clogging nuclear island sump pump as described in claim 4, characterized in that, The auxiliary cleaning and monitoring module includes: A data acquisition and processing unit configured to collect sensor data in real time, preprocess the data, and generate real-time state parameters including filter screen pressure difference, equipment vibration value, pipeline wear amount, and slag storage amount; A remote monitoring and control unit configured to perform fault diagnosis based on the obtained real-time state parameters and adjust parameters of each control terminal based on the fault diagnosis results; A communication unit configured to upload the real-time state parameters and fault warning information to a cloud monitoring platform, remotely retrieve the operation data of each device based on a mobile terminal, and at the same time, manually control the start and stop of each control terminal based on the mobile terminal.

6. A wastewater treatment method for an anti-clogging nuclear island sump pump, applied in the anti-clogging nuclear island sump pump as described in claim 5, characterized in that, It includes the following steps: Multi-stage gradient filtration and interception: The wastewater containing solid particles is subjected to three-stage gradient filtration and interception in sequence through the grille filter screen (21), the woven filter screen (22) and the inner cleaning filter screen (23) in the filtration chamber (2); Adaptive cleaning and maintenance: Based on real-time monitoring data from the auxiliary cleaning monitoring module, real-time status parameters are generated and fault diagnosis is performed to conduct adaptive cleaning and maintenance of the filtration system; Spiral flow conveying: The filtered wastewater is conveyed in a spiral flow manner through the conveying pipe (3), and the operating frequency of the sump pump body (1) is adjusted based on the flow sensor data; Intelligent sludge reflux: The sludge reflux device (4) realizes the directional transportation of wastewater containing solid particles and the control of the reflux of filtered wastewater.

7. The wastewater treatment method for the anti-clogging nuclear island sump pump as described in claim 6, characterized in that, Multi-level gradient filtering interception also includes: The pressure sensor installed in the filter chamber (2) continuously collects the pressure difference data on both sides of each filter screen. The collected pressure difference data is input into the preset particle size pressure difference correlation model to calculate the proportion of particles in each particle size range in the current wastewater. When the calculated proportion of large particles exceeds the threshold for large particle proportion, the cleaning cycle of the woven filter screen (22) is shortened. When the proportion of small particles exceeds the threshold for small particle proportion, the flushing pressure of the high-pressure water nozzle (232) is increased.

8. The wastewater treatment method for the anti-clogging nuclear island sump pump as described in claim 7, characterized in that, Adaptive cleaning and maintenance, specifically including: Based on the auxiliary cleaning monitoring module, the filter screen pressure difference change rate, the vibration frequency data of the sump pump body (1) and the sewage discharge component (41) are collected at the preset collection frequency. At the same time, the filter screen pressure difference decrease after each high-pressure water nozzle (232) flushing is obtained as flushing effect data. The collected data on filter pressure difference change rate, vibration frequency, and rinsing effect are preprocessed to generate a standardized time series dataset. The preprocessed time series dataset is input into a preset trend prediction framework according to a preset time length, and the feature change trend within the continuous time period is extracted to construct a filter clogging trend prediction model. Obtain the prediction results of the filter clogging trend prediction model. When the prediction result is that the probability of the filter pressure difference exceeding the target pressure difference within a certain period of time is greater than the preset probability threshold, send a pre-cleaning command to the drive motor (233) and each control terminal. The drive motor (233) drives the self-cleaning rotating roller (231) to rotate at a preset multiple higher than the normal speed. At the same time, the pressure of the high-pressure water nozzle (232) is increased in multiple steps from the initial pressure value. Each step increases the preset pressure value and maintains it for a preset time. Finally, it stabilizes in the target pressure range and returns to normal parameters after rinsing for a preset time. If the filter pressure difference drops more than the preset drop percentage threshold within a certain period after pre-cleaning, the interval between the next pre-cleaning trigger will be extended to the preset duration.

9. The wastewater treatment method for the anti-clogging nuclear island sump pump as described in claim 8, characterized in that, Adaptive cleaning and maintenance also includes: After each pre-cleaning operation is completed, the deviation data between the actual filter pressure difference change curve and the predicted curve is obtained, and the deviation data and the execution parameters of this cleaning operation are integrated into the model optimization dataset. Using a preset cycle as the unit, the weights of each feature in the filter clogging trend prediction model are iteratively adjusted based on newly added cleaning operation data and cleaning feedback data.

10. The wastewater treatment method for the anti-clogging nuclear island sump pump as described in claim 9, characterized in that, Spiral flow conveying, specifically including: Based on the flow sensor and ultrasonic thickness sensor in the conveying pipeline (3), the real-time flow data and wear rate data of each pipeline are collected in real time. The flow rate data and wear rate data are associated and stored to form a transport status dataset that includes timestamps, flow values, pipeline location coordinates and corresponding wear rates; Obtain the physical structural parameters of the spiral guiding ridge, construct a virtual guiding model, and combine real-time flow data to obtain the turbulence intensity and scouring force distribution of the current spiral flow state; When the local wear rate of the pipeline is detected to exceed the preset wear rate threshold, the flow characteristics and wear data of the corresponding area are extracted, and the equivalent flow coefficient in the virtual flow guiding model is dynamically calibrated. The optimal water flow velocity range is calculated based on the calibrated virtual flow guide model. The water flow velocity is stabilized within the optimal water flow velocity range by adjusting the operating frequency of the sump pump body (1), so that the spiral water flow forms a directional scouring effect on the wear parts.

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