A suspended solids interception system and method

Abstract

A suspended solid interception system and method, comprising a cabinet, a hollow rotating cylinder and an arc-shaped interception component are arranged in the cabinet, at least two interception net plates are arranged on the hollow rotating cylinder at intervals, the outer end of the interception net plate is provided with a scraper for scraping the intercepted substances on the arc-shaped interception component, a spiral conveying device is arranged in the hollow rotating cylinder for conveying and squeezing the intercepted substances, an elastic vibration component and a flushing device are arranged on the cabinet, the elastic vibration component is used for making the interception net plate rotating to vibrate to fall off the intercepted substances, the flushing device is used for cleaning the interception net plate, and a control center is arranged, the control center is used for adjusting the working parameters of the hollow rotating cylinder, the spiral conveying device and the flushing device. The present application can accurately intercept the micro suspended solid, greatly improve the interception efficiency, guarantee the stability of the subsequent treatment process, prevent the interception net plate from adhering and accumulating the suspended solid, and can adapt to different water quality and quantity, and improve the maintainability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspended solid filtration, and more particularly to a suspended solid interception system and method. BACKGROUND

[0002] Pretreatment is the first link in sewage treatment, and the grille is one of the main equipment in this link. The grille is generally the first important equipment of the first structure of the sewage treatment plant, which can automatically and continuously intercept and remove floating objects in the water, protecting the normal operation of the subsequent water pump.

[0003] Generally, the pretreatment of a sewage treatment plant includes 2-3 grilles: the first grille is a coarse grille, and the gap width of the coarse grille is generally 16-25 mm, which is used to protect the water pump; the second grille is a fine grille, which is used after the pump and before the sand setting, and the gap width of the fine grille is generally 1.5-10 mm, which is used to further protect the stable operation of the subsequent treatment structure and equipment; the sewage treatment plant using membrane process and biological aerated filter process needs to safely separate small objects to avoid the blockage of the membrane assembly and the filter filler, and generally a third grille, i.e., an ultra-fine grille, is provided, and the gap of the ultra-fine grille is generally less than or equal to 1 mm.

[0004] At present, domestic sewage treatment plants generally use 2 grilles, of which the first coarse grille has a gap of 15-20 mm, and the second fine grille has a gap of 3-5 mm. In actual operation, it is found that the subsequent floating sludge and siltation are more serious, which affects the performance of the subsequent biological reaction tank. In addition, if the sewage treatment plant is to be upgraded by reducing the gap of the fine grille to improve the interception efficiency of the fine grille, it will face the dilemma that the current mainstream fine grilles need a large cross-sectional area, and the cross-sectional area of the existing fine grille channel is not enough.

[0005] Therefore, the existing technology needs to be further improved and developed to solve the above problems. SUMMARY

[0006] (I) Invention purpose: To solve the above problems in the prior art, the purpose of the present application is to provide a system and method with small flow area and high suspended solid interception efficiency.

[0007] (II) Technical solution: In order to solve the above technical problems, the present technical solution provides a suspended solid interception system, comprising,

[0008] A casing is provided with a hollow rotating cylinder and an arc-shaped interception member inside;

[0009] At least two interception net plates are installed on the hollow rotating cylinder at intervals, and the outer end of the interception net plate is provided with a scraper for scraping off the trapped objects on the arc-shaped interception member.

[0010] The hollow rotating cylinder is provided with a spiral conveying device for conveying and squeezing the retained materials;

[0011] The machine shell is provided with an elastic vibration member and a flushing device, the elastic vibration member is used to make the intercepted net plate vibrate to fall off the retained materials, and the flushing device is used to clean the intercepted net plate;

[0012] A control center is arranged for adjusting the working parameters of the hollow rotating cylinder, the spiral conveying device and the flushing device.

[0013] The suspended solid interception system, wherein the intercepted net plate is a square structure, the number is 2-8, and the intercepted net plates are uniformly and spacedly distributed along the circumference of the hollow rotating cylinder.

[0014] The suspended solid interception system, wherein the gap width of the grid of the arc-shaped interception member is less than or equal to 1mm, and the mesh aperture of the intercepted net plate is matched with the gap of the grid of the arc-shaped interception member.

[0015] The suspended solid interception system, wherein the elastic vibration member is installed at the top end of the machine shell and is in contact with the inner edge of the intercepted net plate, when the intercepted net plate rotates to the top end position with the hollow rotating cylinder, the elastic vibration member is elastically deformed under pressure and releases vibration.

[0016] The suspended solid interception system, wherein the flushing device comprises at least two rows of high-pressure nozzles, the high-pressure nozzles are installed on the inner side of the outer frame of the machine shell and are directed to the surface of the intercepted net plate; the control center controls the opening time and flushing time of the high-pressure nozzles according to the rotating speed of the hollow rotating cylinder or the liquid level difference before and after the grid.

[0017] The suspended solid interception system, wherein the intercepted net plate is fixedly connected with the non-hollow area of the hollow rotating cylinder through a smooth steel plate, the inner edge of the intercepted net plate is provided with a stainless steel slide, and the slide assists the suspended solid on the intercepted net plate to slide into the hollow rotating cylinder; the scraper is made of wear-resistant rubber or metal material and is attached to the surface of the arc-shaped interception member.

[0018] The suspended solid interception system, wherein the machine shell is a closed structure, the top is provided with a detachable maintenance cover, the side is provided with a deodorization interface, and the deodorization interface is communicated with a deodorization system.

[0019] The suspended solid interception system, wherein the control center further comprises a historical working condition storage unit and a parameter self-adaptive unit,

[0020] The historical working condition storage unit is configured to store historical optimal parameter templates of the interception system under different running scenarios, and the templates include multi-dimensional associated data representing running states.

[0021] The parameter adaptive unit is configured to obtain a real-time running parameter set of the current interception system, perform multi-dimensional similarity calculation on the real-time running parameter set and reference parameter sets in the historical optimal parameter templates, determine a historical working condition with the highest matching degree, and adjust the running parameters of the current interception system based on parameters corresponding to the historical working condition with the highest matching degree.

[0022] The real-time running parameter set and the reference parameter set each include a first parameter subset and a second parameter subset, the first parameter subset is a parameter set representing external environmental characteristics, and the second parameter subset is a parameter set representing device running states.

[0023] The multi-dimensional similarity calculation includes similarity calculation on the first parameter subset of the real-time running parameter set and the first parameter subset of the reference parameter set, and similarity calculation on the second parameter subset of the real-time running parameter set and the second parameter subset of the reference parameter set, and fusion of results of the two into a comprehensive similarity according to a preset rule.

[0024] The first parameter subset of the real-time running parameter set and the first parameter subset of the reference parameter set are calculated by using a numerical similarity algorithm, including:

[0025] For each parameter in the first parameter subset of the preprocessed real-time running parameter set, a deviation degree of the parameter from a corresponding parameter in the first parameter subset of the reference parameter set is calculated.

[0026] According to an influence weight of each parameter on the running of the interception system, the deviation degrees are weighted and summed to obtain a first-dimensional similarity.

[0027] The second parameter subset of the real-time running parameter set and the second parameter subset of the reference parameter set are calculated by using a vector similarity algorithm, including:

[0028] The second parameter subset of the preprocessed real-time running parameter set and the second parameter subset of the reference parameter set are respectively represented as multi-dimensional vectors.

[0029] A direction consistency measure value and / or a distance proximity measure value of the multi-dimensional vector corresponding to the second parameter subset of the real-time running parameter set and the multi-dimensional vector corresponding to the second parameter subset of the reference parameter set are calculated.

[0030] The direction consistency measure value and / or the distance proximity measure value are normalized to a preset similarity interval.

[0031] According to the correlation characteristics between the parameters in the second parameter subset of the real-time operation parameter set, at least one of the following modes is dynamically selected to determine the second dimension similarity:

[0032] When there is strong correlation between the parameters, the normalized direction consistency measure value is taken as the second dimension similarity;

[0033] When there is weak correlation between the parameters, the normalized distance proximity measure value is taken as the second dimension similarity;

[0034] When there is mixed correlation between the parameters, the normalized direction consistency measure value and the distance proximity measure value are fused by a preset fusion rule to obtain the second dimension similarity.

[0035] The suspended solid interception system, wherein the preset fusion rule includes dynamic weight fusion, specifically:

[0036] A fusion coefficient β is defined, with a value range of 0-1, and the fusion coefficient is used to adjust the weight proportion of the first dimension similarity and the second dimension similarity;

[0037] When the system detects that the external environmental disturbance intensity exceeds the preset threshold, the value of β increases, and the first dimension similarity is preferentially relied on;

[0038] When the system detects that the device operating state deviates from the initial calibration value, the value of β decreases, and the second dimension similarity is preferentially relied on;

[0039] The comprehensive similarity S = β × the first dimension similarity + (1-β) × the second dimension similarity.

[0040] The suspended solid interception system, wherein the control center further includes a fault early warning unit, which collects real-time operation feature data of the device and extracts typical fault feature templates from a historical database, compares the real-time operation feature data with the typical fault feature templates in terms of similarity, and generates a fault early warning signal and triggers a preset coping strategy when the similarity reaches a preset threshold.

[0041] A suspended solid interception method applied to the suspended solid interception system described above, including the following steps,

[0042] Making raw sewage flow through a fluid passage provided with an interception net plate, driving the interception net plate to rotate, and the interception net plate outer end scraper scraping part being in contact with the surface of the arc-shaped interception member to remove the suspended solids intercepted by the arc-shaped interception member;

[0043] When the rotating interception net plate rotates to a preset station, the interception net plate is vibrated by the elastic vibration member to make the suspended solids attached to the surface of the interception net plate fall off to the inside of the hollow rotating cylinder.

[0044] The spiral conveying device in the hollow rotating cylinder body conveys the detached suspended solids to the discharge port and discharges the suspended solids after dehydration treatment in the conveying process;

[0045] The control center monitors the operating state parameters of the interception net plate or the resistance parameters of the fluid channel, and when the parameters reach the preset threshold, the flushing device is started to clean the interception surface of the interception net plate.

[0046] (Three) beneficial effects: the present application provides a suspended solid interception system and method, which can accurately intercept small suspended solids, greatly improve the interception efficiency, and ensure the stability of the subsequent treatment process; prevent the interception net plate from adhering and accumulating suspended solids; the system can adapt to different water quality and quantity, accurately evaluate the matching degree of the working condition, flexibly cope with complex environment, and always maintain the optimal operating state; find and handle potential faults in advance, reduce downtime and maintenance cost, and improve system maintainability. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a vertical sectional structure schematic diagram of the suspended solid interception system of the present application;

[0048] Figure 2 is a horizontal sectional structure schematic diagram of the suspended solid interception system of the present application;

[0049] Figure 3 is a hollow rotating cylinder body structure schematic diagram of the suspended solid interception system of the present application;

[0050] Figure 4 is a sectional structure schematic diagram of the interception net plate of the suspended solid interception system of the present application;

[0051] Figure 5 is a structure schematic diagram of the elastic vibration member of the suspended solid interception system of the present application;

[0052] 1 - grid channel; 2 - machine shell; 3 - arc-shaped interception member; 4 - interception net plate; 4-1 - scraper; 4-3 - slide; 5 - hollow rotating cylinder body; 5-1 - support ring; 6 - spiral conveying device; 7 - elastic vibration member; 7-1 - rotating shaft fixing seat; 7-2 - rotating shaft; 7-3 - vibration rod; 7-4 - connecting rod; 7-5 - compression spring; 7-6 - vibration member fixing seat; 7-7 - adjusting screw; 8 - flushing device; 9 - speed reducer motor; 10 - motor. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below with reference to preferred embodiments. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0054] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that these drawings are for illustrative purposes only and are not drawn to scale, and should not be construed as limiting the actual scope of protection of the present invention.

[0055] A suspended solids interception system is used in the pretreatment stage of wastewater treatment plants, such as Figure 1 As shown, the device includes: a housing 2, inside which is a perforated rotating cylinder 5 and an arc-shaped interceptor 3; at least two interceptor plates 4 are installed at intervals on the perforated rotating cylinder 5, and the outer end of the interceptor plate 4 is provided with a scraper 4-1 for scraping off the trapped material on the arc-shaped interceptor 3; a spiral conveying device 6 is provided inside the perforated rotating cylinder 5 for conveying and pressing the trapped material; an elastic vibrating element 7 and a rinsing device 8 are provided on the housing 2, the elastic vibrating element 7 is used to make the rotating interceptor plate 4 vibrate to dislodge the trapped material, and the rinsing device 8 is used to clean the interceptor plate 4; and a control center, which is connected to the perforated rotating cylinder 5, the spiral conveying device 6 and the rinsing device 8 respectively, for adjusting the working parameters of the perforated rotating cylinder 5, the spiral conveying device 6 and the rinsing device 8.

[0056] The casing 2 is a sealed rectangular structure, measuring 3m × 1.5m × 2.5m (length × width × height), and can be made of steel. The casing 2 has a removable inspection cover on the top and an odor control interface on the side, which is connected to the odor control system. Specifically, the casing 2 has two removable inspection covers on the top, each measuring 0.8m × 0.6m. A DN100 odor control interface is pre-installed on the side, which is connected to the plant's biological filter odor control system via a flange. The bottom of the casing 2 is sealed to a concrete channel, forming a wastewater flow channel.

[0057] The hollow rotating cylinder 5 is a cylindrical cylinder, which can have a diameter of 800 mm and a length of 2.8 m. The outer surface of the hollow rotating cylinder 5 is uniformly distributed with hollow holes with a diameter of 50 mm, and the opening rate of the hollow holes is 60%. The material of the hollow rotating cylinder 5 can be 304 stainless steel or other corrosion-resistant materials, which is not specifically limited here. The two ends of the hollow rotating cylinder 5 are connected with the side wall of the machine shell 2 through bearings, the bearings are connected with the motor 10, the motor 10 is a variable frequency motor, the power of the motor 10 is 5.5 kW, the rotating speed range is 0.5-2 r / min, and the positive and negative rotation switching is supported. The side surface of the hollow rotating cylinder 5 is uniformly distributed with support rings 5-1, which can be 6, as shown in Figure 3

[0058] The intercepting net plate 4 is a square structure, the number is 2-8, and is uniformly and spaced distributed along the circumference of the hollow rotating cylinder 5. The intercepting net plate 4 is fixedly connected with the non-hollow area of the hollow rotating cylinder 5 through a smooth steel plate, the inner edge of the intercepting net plate 4 is provided with a stainless steel slide 4-3, the scraper 4-1 is made of wear-resistant rubber or metal material, and is attached to the surface of the arc-shaped intercepting member 3. As shown in Figure 2 Figure 4 Specifically, the intercepting net plate 4 is a square ladle type net plate, and specifically six square ladle type net plates are adopted, the size of a single net plate is 1.2 m*0.6 m, the mesh is square, the aperture is matched with the gap of the grid strip of the arc-shaped intercepting member 3, and specifically can be 0.8 mm, and the intercepting net plate 4 is welded to the non-hollow area of the hollow rotating cylinder 5 through a 3 mm thick smooth steel plate. The inner edge of the intercepting net plate 4 is welded with a 304 stainless steel slide 4-3, the slide 4-3 is 50 mm wide and 10 mm high. The outer end of the intercepting net plate 4 vulcanizes a 50 mm wide wear-resistant rubber scraper 4-1, the scraper 4-1 has a Shore hardness of 70, is attached to the surface of the arc-shaped intercepting member 3, and has a surface pressure of 0.2 MPa. The slide 4-3 is a rectangular steel plate with a smooth surface, which is used to slide the suspended solids intercepted by the intercepting net plate 4. When the intercepting net plate 4 passes through the elastic vibration member 7, the intercepting net plate 4 vibrates, the suspended solids fall off from the intercepting net plate 4, slide through the slide 4-3, and finally fall into the hollow rotating cylinder 5.

[0059] The gap width of the grid strip of the arc-shaped intercepting member 3 is ≤1 mm, and the mesh aperture of the intercepting net plate 4 is matched with the gap of the grid strip of the arc-shaped intercepting member 3. The arc-shaped intercepting member 3 can be a 304 stainless steel arc-shaped grid plate, the curvature radius of the grid plate is 1.2 m, the grid strip gap can be 0.8 mm, the grid strip thickness is 3 mm, the horizontal spacing is 10 mm, and the arc-shaped intercepting member 3 is fixedly connected with the inner side of the machine shell 2 and covers 80% of the sewage flow section.

[0060] ​​The screw conveyor 6 is horizontally installed inside the hollow rotating cylinder 5, the central axis of the screw conveyor 6 coincides with the central axis of the hollow rotating cylinder 5, the screw diameter of the conveyor is 500 mm, the pitch is 200 mm, and the material is duplex stainless steel. The screw conveyor 6 is driven by an independent speed reducer motor 9, the power of the speed reducer motor 9 is 2.2 kW, and the conveying speed is 0.3 m / s. The outlet end of the screw conveyor 6 is provided with a squeezing section, that is, the pitch is gradually and uniformly reduced to one half of the original pitch, which can be 100 mm, so as to reduce the water content of the grid residue to below 65%.

[0061] The elastic vibration member 7 is installed at the top end of the machine shell 2 and in contact with the inner edge of the intercepting net plate 4. When the intercepting net plate 4 rotates with the hollow rotating cylinder 5 to the top end position of the machine shell 2, the elastic vibration member 7 is compressed to produce elastic deformation and release vibration.

[0062] The elastic vibration member 7 is an adjusting spring, which is installed at the top end of the machine shell 2 and in contact with the inner edge of the intercepting net plate 4. When the intercepting net plate 4 rotates with the hollow rotating cylinder 5 to the top end position, the adjusting spring is compressed to produce elastic deformation and release vibration. Specifically, the elastic vibration member 7 includes two groups of adjusting springs, the diameter of the adjusting spring is 12 mm, the free length is 150 mm, and the stiffness coefficient is 50 N / mm. The two groups of adjusting springs are installed at the inner side of the machine shell 2 top end 1.5 m away from the cylinder center axis, and the lower end of the adjusting spring is in contact with the stainless steel slide 4-3 of the inner edge of the intercepting net plate 4. When the intercepting net plate 4 rotates to the top end position, the intercepting net plate 4 is in contact with the adjusting spring, the speed of the intercepting net plate 4 is reduced, and a speed difference is generated with the circumferential center speed. Because the torque of the hollow rotating cylinder 5 at the center of the intercepting net plate 4 is greater than the torque of the adjusting spring, the hollow rotating cylinder 5 pushes the adjusting spring to deform, and the intercepting net plate 4 passes through the adjusting spring. At this time, the rotating resistance of the intercepting net plate 4 becomes smaller, and the speed increases to the initial speed. In this process, the suspended solids on the intercepting net plate 4 fall off.

[0063] Another specific embodiment of the elastic vibration member 7, as shown in Figure 5 It can also include a rotating shaft fixing seat 7-1, a rotating shaft 7-2, a vibration rod 7-3, a connecting rod 7-4, a compression spring 7-5, a vibration member fixing seat 7-6, and an adjusting screw rod 7-7.

[0064] The vibration piece fixing seat 7-6 is fixed on the outer wall of the shell 2, the adjusting screw 7-7 passes through the vibration piece fixing seat 7-6 and is connected with the compression spring 7-5, the end of the compression spring 7-5 away from the vibration piece fixing seat 7-6 is connected with the connecting rod 7-4 through a rotating shaft. The connecting rod 7-4 is connected with the rotating shaft fixing seat 7-1 fixed on the inner wall of the shell 2 through the rotating shaft 7-2. The end of the connecting rod 7-4 away from the shell 2 is connected with the vibration rod 7-3 through the rotating shaft 7-2. When the vibration rod 7-3 rotates counterclockwise with the rotating shaft 7-2 as the center, the connecting rod 7-4 rotates counterclockwise with the rotating shaft 7-2 as the center under the action of friction, and the compression spring 7-5 is compressed. The height of the rotating shaft fixing seat 7-1 is less than the distance between the scraper 4-1 and the shell 2, the end of the vibration rod 7-3 away from the shell 2 can contact the scraper 4-1 and / or the intercepting net plate 4, and the maximum length of the contact between the end of the vibration rod 7-3 away from the shell 2 and the scraper 4-1 and / or the intercepting net plate 4 is less than or equal to 2 cm.

[0065] When the intercepting net plate 4 rotates to the upper vertical position, the intercepting net plate 4 is deformed under the resistance of the vibration rod 7-3, the edge linear velocity rapidly decreases, and a speed difference is generated between the edge linear velocity and the circumferential center velocity. Since the center rotating cylinder torque of the intercepting net plate 4 is greater than the torque of the vibration rod 7-3, after the intercepting net plate 4 is deformed, the vibration rod 7-3 is pushed to generate circumferential motion with the rotating shaft 7-2 as the center, so that the intercepting net plate 4 is separated from the resistance of the vibration rod 7-3, the edge linear velocity rapidly recovers to the circumferential center velocity, and an elastic force is generated to shake off the suspended solids attached to the surface, and the suspended solids enter the spiral conveying device 6 in the hollow rotating cylinder 5 in the center and are discharged. The rotating shaft 7-2 is fixed in the shell through the rotating shaft fixing seat 7-1, a plurality of vibration rods 7-3 are arranged on the rotating shaft according to the use requirement, and the connecting rod 7-4 is connected with the compression spring 7-5, so as to transmit the torque of the compression spring to the vibration rod 7-3. The torque of the compression spring is adjusted through the adjusting screw 7-7, so as to affect the speed difference between the edge linear velocity of the intercepting net plate 4 and the circumferential center, so that the suspended solid shaking off intensity and the torque of the compression spring 7-5 form a corresponding functional relationship. The adjusting screw 7-7 is fixed on the outside of the shell through the vibration piece fixing seat 7-6. When one of the intercepting net plates 4 passes through the vibration rod 7-3, the vibration rod 7-3 is rapidly reset under the action of the compression spring 7-5, and the same resistance value is generated on each of the intercepting net plates 4 in turn, so that the speed difference is generated and the suspended solids attached to the surface are shaken off.

[0066] The flushing device 8 comprises at least two rows of high-pressure nozzles installed on the inner side of the outer frame of the casing 2 and facing the surface of the intercepting screen plate 4. The control center controls the opening timing and flushing duration of the high-pressure nozzles according to the rotating speed of the hollow rotating cylinder 5 or the liquid level difference before and after the grid. Specifically, two rows of high-pressure nozzles are symmetrically installed on the inner side of the outer frame of the casing 2, with 12 nozzles in each row and a spacing of 200 mm. The high-pressure nozzles are connected to a high-pressure cleaning pump. The control center controls the start of the flushing device 8 according to the relationship between the liquid level difference before and after the grid and the first flushing threshold value, or the first rotating speed threshold value of the hollow rotating cylinder 5. The first flushing threshold value and the first rotating speed threshold value are preset values. The first flushing threshold value can be 0.3 mm, and the first rotating speed threshold value can be 1.5 r / min. When the liquid level difference before and after the grid is greater than or equal to the first flushing threshold value, or the rotating speed of the hollow rotating cylinder 5 is greater than or equal to the first rotating speed threshold value, the flushing device 8 is started. The single flushing duration of the flushing device 8 can be 10 s, with an interval of 30 min.

[0067] The control center can be a PLC controller, which comprises a liquid level difference sensor, a rotating speed encoder, and an electromagnetic flowmeter. The control center supports manual / automatic mode switching. In automatic mode, the cylinder rotating speed is adjusted according to the water inlet flow, and the spiral conveying device 6 and the cylinder rotating speed are controlled synchronously, and the flushing device 8 is controlled in linkage, at this time, the liquid level difference is triggered when it exceeds the standard.

[0068] The liquid level difference sensor is arranged on the front and rear sides of the grid, i.e. the water inlet side and the water outlet side of the grid channel 1, specifically on the sewage flow pipeline or channel side wall outside the casing 2, and located in the upstream and downstream areas of the intercepting screen plate 4. The liquid level difference sensor measures the water level difference before and after the grid. The control center judges the blocking degree of the intercepting screen plate 4 according to the water level difference before and after the grid. The greater the liquid level difference, the more serious the blocking, and the control center starts high-pressure flushing or adjusts the cylinder rotating speed according to the blocking degree of the intercepting screen plate 4.

[0069] The rotating speed encoder is installed on the center transmission shaft end of the hollow rotating cylinder 5, or connected to the output shaft of the motor 10 through a shaft coupling. The rotating speed encoder rotates synchronously with the center transmission shaft. The rotating speed encoder collects the rotating speed signal of the cylinder in real time and feeds back the rotating speed signal to the control center. The control center adjusts the output frequency of the variable frequency motor according to the rotating speed signal to realize precise control of the rotating speed.

[0070] The electromagnetic flowmeter is installed in the water inlet main pipe of the suspended solid interception system, or the straight pipe section of the sewage channel upstream of the grid, on the pipeline after the coarse grid and before the interception system. The electromagnetic flowmeter measures the sewage flow entering the system, and the control center dynamically adjusts the rotating speed of the hollow rotating cylinder 5 according to the change of the sewage flow. When the flow increases, the rotating speed is increased to enhance the interception efficiency, and the equipment is matched with the water inlet load.

[0071] Here, the process of intercepting suspended solids in sewage by the suspended solid interception system is described.

[0072] The raw sewage enters the casing 2 through the grid channel 1. The six interception screens 4 rotate clockwise with the hollow rotating cylinder 5. The 0.8mm aperture on the surface of the interception screen 4 intercepts suspended solids such as fibers, hair, and small plastic particles in the water. A small amount of suspended solids that are not intercepted flow through the arc-shaped interception member 3 and are intercepted again. The rubber scraper 4-1 at the outer end of the interception screen 4 rotates with the cylinder and scrapes the grid residue on the surface of the arc-shaped interception member 3 into the water, which is then salvaged by the subsequent screen.

[0073] When the interception screen 4 rotates to the top position, the inner edge stainless steel chute 4-3 extrudes the adjusting spring, and the vibration released by the elastic deformation of the spring makes the grid residue attached to the surface of the screen fall off and slide into the interior of the hollow rotating cylinder 5 along the inclined surface of the interception screen 4. The spiral conveying device 6 pushes the grid residue to the outlet, and after dehydration in the pressing section, it is sent to the grid residue treatment system in the plant through the residue discharge pipe.

[0074] When the liquid level difference before and after the grid reaches the first flushing threshold, or the rotating speed of the cylinder increases to the first rotating speed threshold, the control center starts the high-pressure nozzle, and the two rows of nozzles alternately flush the surface of the rotating screen in a fan shape to remove the clogging of the screen holes. The flushing wastewater enters the subsequent treatment unit with the sewage.

[0075] The closed design of the casing 2 creates a negative pressure inside, and the foul gas enters the deodorization system in the plant, such as a biological filter + activated carbon adsorption, through the side deodorization interface. The top maintenance cover is opened regularly for maintenance, and the screen is removed through the stainless steel chute 4-3 for maintenance, and the scraper 4-1 is replaced or the screen holes are cleaned.

[0076] Through the double interception of the interception screen 4 + arc-shaped interception member 3, the grid gap is 0.8mm, and the suspended solid interception efficiency can reach more than 92%, which is 40% higher than the traditional 3~5mm gap of the fine grid. The synergistic effect of vibration residue removal + high-pressure flushing reduces the clogging rate of the interception screen 4 to less than 5%, and the continuous operation time of the equipment is ≥720h. The closed structure cooperates with the deodorization system to make the surrounding foul gas concentration ≤0.5ppm.

[0077] The control center further comprises a historical working condition storage unit and a parameter adaptive unit, the historical working condition storage unit is used for storing historical optimal parameter templates of the interception system under different running scenarios, and the templates contain multi-dimensional associated data representing running states: the rotating speed of the hollow rotating cylinder 5, the pressing pressure of the screw conveying device 6, the opening threshold and the corresponding water inflow of the flushing device 8, the associated data of the suspended solid concentration, the liquid level difference and the like.

[0078] The parameter adaptive unit obtains a real-time running parameter set of the current interception system, performs multi-dimensional similarity calculation on the real-time running parameter set and a reference parameter set in the historical optimal parameter template, determines a historical working condition with the highest matching degree, and adjusts the running parameter of the current interception system based on the parameter corresponding to the historical working condition with the highest matching degree. The real-time running parameter set includes but is not limited to the water inflow, the suspended solid concentration, the liquid level difference, the rotating speed of the cylinder and other parameters of the equipment running. Specifically, the real-time running parameter set is obtained as a target parameter set; the target parameter set is matched with the reference parameter set in the historical optimal parameter template, the attribute similarity and the label similarity of the two are calculated to determine the historical working condition with the highest similarity, the attribute similarity includes the flow matching degree and the liquid level difference change rate, and the label similarity includes the working condition label high load and low load; the running parameter of the current interception system is automatically adjusted based on the optimal parameter corresponding to the historical working condition with the highest similarity, such as the rotating speed of the cylinder and the flushing frequency.

[0079] The real-time running parameter set and the reference parameter set each include a first parameter subset and a second parameter subset, the first parameter subset is a parameter set representing external environmental characteristics, that is, a physical parameter subset, including the water inflow, the suspended solid concentration, the water temperature, the pH value and the like. The second parameter subset is a parameter set representing the running state of the equipment, that is, an equipment parameter subset, including the rotating speed of the hollow rotating cylinder 5, the pressing pressure of the screw conveying device 6, the liquid level difference and the opening frequency of the flushing device 8 and the like.

[0080] The multi-dimensional similarity calculation includes similarity calculation on the first parameter subset of the real-time running parameter set and the first parameter subset of the reference parameter set, and the second parameter subset of the real-time running parameter set and the second parameter subset of the reference parameter set, respectively, and the results of the two are fused into a comprehensive similarity according to a preset rule, such as weighted summation of the results of the two to obtain the comprehensive similarity.

[0081] Before the multi-dimensional similarity calculation, the parameter adaptive unit pre-processes the real-time running parameter set and the reference parameter set, including:

[0082] Each parameter is standardized or normalized to eliminate dimensional differences. A normalization interval is defined for each parameter: parameters in the first subset are assigned to the interval [0,1], e.g., influent flow rate 0~1000 m³ / h corresponds to 0~1; parameters in the second subset are assigned to the interval [-1,1], e.g., rotational speed deviation -50%~+50% corresponds to -1~1. The parameters of the real-time operating parameter set and the reference parameter set are then transformed to their corresponding intervals using a linear transformation formula.

[0083]

[0084] These are the parameter values ​​of the first parameter subset after normalization, i.e., the physical parameters; The parameter values ​​for the real-time running parameter set; The minimum valid parameter value of the first parameter subset in the reference parameter set; The maximum valid parameter value is the first parameter subset of the reference parameter set.

[0085]

[0086] These are the parameter values ​​of the second parameter subset after normalization, i.e., the device parameters; The parameter values ​​are for the real-time running parameter set; The reference parameter value is the optimal value of this device parameter in the historical optimal parameter template; It is 50% of the reference parameter value for the maximum permissible deviation range.

[0087] Abnormal parameter values ​​can be corrected, specifically by using a moving average method to smooth out instantaneous fluctuations in data and ensure data validity.

[0088] The similarity calculation between the first parameter subset of the real-time running parameter set and the first parameter subset of the reference parameter set uses a numerical similarity algorithm, including:

[0089] For each parameter in the first parameter subset of the preprocessed real-time running parameter set, calculate its deviation from the corresponding parameter in the first parameter subset of the reference parameter set;

[0090] Based on the weight of each parameter's impact on the operation of the interception system, the deviation is weighted and summed to obtain the first dimension of similarity.

[0091] Specifically, this includes assigning preset weighting factors to physical parameters in the first parameter subset of the preprocessed real-time operating parameter set, such as influent flow rate. weighting factor w f =0.4, weighting factor w of suspended solids concentration c c =0.3, weighting factor w for water temperature t t= 0.15, weight factor w of pH value p p = 0.15; calculate the absolute deviation of each parameter: , , and so on; calculate the physical similarity by weighted summation , that is, the first dimension similarity:

[0092]

[0093] The influence weight is a preset value, which is determined based on sensitivity analysis of historical operation data and can be modified by an input unit of the control center.

[0094] The similarity calculation of the second parameter subset of the real-time operation parameter set and the second parameter subset of the reference parameter set adopts a vector type similarity algorithm, including:

[0095] The second parameter subset of the preprocessed real-time operation parameter set and the second parameter subset of the reference parameter set are respectively represented as multi-dimensional vectors;

[0096] The direction consistency measure value and / or distance proximity measure value of the multi-dimensional vector corresponding to the second parameter subset of the real-time operation parameter set and the multi-dimensional vector corresponding to the second parameter subset of the reference parameter set are calculated;

[0097] The direction consistency measure value and / or distance proximity measure value are normalized to convert to a preset similarity interval;

[0098] According to the correlation characteristics between parameters in the second parameter subset of the real-time operation parameter set, at least one of the following modes is dynamically selected to determine the second dimension similarity:

[0099] When there is strong correlation between parameters, the normalized direction consistency measure value is taken as the second dimension similarity;

[0100] When there is weak correlation between parameters, the normalized distance proximity measure value is taken as the second dimension similarity;

[0101] When there is mixed correlation between parameters, the normalized direction consistency measure value and the distance proximity measure value are fused by a preset fusion rule to obtain the second dimension similarity.

[0102] Specifically,

[0103] The normalized equipment parameters in the first parameter subset of the real-time operation parameter set are constructed into a real-time vector , the equipment parameters in the second parameter subset of the reference parameter set are constructed into a reference vector , the equipment parameters: rotational speed n, pressing pressure P, liquid level difference h, and flushing frequency f;

[0104] Compute vector dot product:

[0105] Compute vector length: , Similarly;

[0106] When there is a strong correlation between parameters, the device similarity S 设备 , that is, the second dimension similarity: ;

[0107] When there is a weak correlation between parameters, the distance proximity is calculated by the Euclidean distance, etc., to obtain the second dimension similarity.

[0108] The preset fusion rule includes dynamic weight fusion, specifically:

[0109] Define the fusion coefficient β, whose value range is 0~1, here take 0.3~0.7 as an example, the fusion coefficient is used to adjust the weight proportion of the first dimension similarity and the second dimension similarity;

[0110] When the system detects that the external environment disturbance intensity exceeds the preset threshold, such as water inflow fluctuation > 30% for a short time, the value of β increases β=0.7, and the first dimension similarity is preferred;

[0111] When the system detects that the device running state deviates from the initial calibration value, such as the cumulative running time exceeds the maintenance period, the value of β decreases β=0.3, and the second dimension similarity is preferred;

[0112] Under other conditions, β=0.5 (physical and device parameters are equal weight)

[0113] The comprehensive similarity S=β×first dimension similarity+(1-β)×second dimension similarity.

[0114] The control center also includes a fault warning unit, which collects real-time running feature data of the device, and extracts typical fault feature templates from the historical database, compares the real-time running feature data with the typical fault feature templates, and generates a fault warning signal and triggers a preset response strategy when the similarity reaches a preset first warning threshold.

[0115] The running feature data includes but is not limited to the vibration characteristics of the moving parts and the load characteristics of the driving unit. The vibration characteristics of the moving parts can be the vibration frequency data of the intercepting net plate 4 obtained by the built-in sensor of the elastic vibration member 7, and the load characteristics of the driving unit can be the motor 10 current data of the hollow rotating cylinder 5. The running feature data is used as the first element data. The typical fault feature template contains the correlation of the feature data before the fault occurs, for example, the fault feature data before the typical faults such as the blocking of the intercepting net plate 4 and the wear of the bearing, which is used as the second element data.

[0116] The first element data is compared with the second element data for similarity, including vibration spectrum similarity and current fluctuation similarity, such as 15Hz characteristic frequency proportion, current fluctuation similarity, such as variance value matching degree. When the similarity is greater than or equal to a first warning threshold, a fault warning signal is triggered and a strengthened flushing or shutdown maintenance instruction is automatically started. The first warning threshold can be 85%.

[0117] The core data of the historical database is derived from the running process records of the interception system throughout its life cycle, including:

[0118] Debugging phase: After the interception system is installed, the benchmark parameters collected by simulating different working conditions are used as the initial template data for subsequent comparison. Different working conditions such as high / low water inflow, high / low suspended solid concentration, benchmark parameters such as normal running vibration frequency of interception screen 4 15Hz±2Hz, motor 10 no-load current 10A±1A, etc.

[0119] Trial operation and daily operation phase: Real-time collection of normal operation data and fault event data, preprocessed by edge computing module and stored in database. Normal operation data such as the correlation between cylinder speed, liquid level difference, flushing frequency and corresponding suspended solid removal rate, fault event data such as vibration spectrum change when interception screen 4 is blocked, motor current fluctuation curve when bearing is worn.

[0120] Artificially annotated data: Maintenance personnel annotate the causes of historical fault events to form associated records of fault type-feature data-treatment measures for optimizing fault feature templates. Historical fault events such as interception screen 4 jam in 2025X month, motor overload in 2025Y month.

[0121] The typical fault feature template in the historical database contains the following dimensions of associated data:

[0122] Fault type label, used for quick matching of fault scenarios, such as interception screen 4 blockage, bearing wear, scraper 4-1 failure, motor overload, etc.

[0123] Feature data sequence, multi-parameter change trend before fault occurs, for example, when the interception screen 4 is blocked: the vibration frequency decreases from 15Hz to 8Hz, the liquid level difference increases from 0.1m to 0.3m, and the motor current increases from 12A to 18A; when the bearing is worn: the cylinder speed fluctuation rate increases from ±0.1r / min to ±0.5r / min, and the motor noise increases from 65dB to 85dB;

[0124] Parameter correlation rules, including mathematical relationships between different parameters, are used to construct multi-dimensional early warning models. For example, when the SS concentration is > 500 mg / L and the liquid level difference increase rate is > 0.05 m / h, the interception screen plate 4 clogging risk increases.

[0125] Here, the interception screen plate 4 clogging is taken as an example to illustrate the working process of the fault early warning unit.

[0126] Real-time acquisition: The vibration frequency of the interception screen plate 4 is obtained through the vibration sensor, the current value is 8 Hz, the front and rear water level difference is obtained through the liquid level difference sensor, the current value is 0.3 m, and the motor current is obtained through the current sensor, the current value is 18 A.

[0127] Template matching: The interception screen plate 4 clogging feature template is retrieved from the historical database, the typical features are: vibration frequency 8 Hz ± 1 Hz, liquid level difference ≥ 0.3 m, current 18 A ± 2 A, the similarity between real-time data and template is calculated, for example, the matching degree is 92%.

[0128] Threshold judgment: When the similarity is ≥ the first early warning threshold 85%, the interception screen plate 4 clogging early warning is triggered, and the enhanced flushing and cylinder speed increase are automatically started. The enhanced flushing is to extend the flushing time to 15 s, and the cylinder speed increase is to increase the cylinder speed from 1 r / min to 1.5 r / min.

[0129] The flushing device 8 also includes a multi-factor weight decision module. The decision module dynamically generates control instructions by comprehensively analyzing the influence of multiple key parameters on flushing demand, realizes precise start and stop of the flushing device 8 and adjustment of operating parameters, avoids excessive or insufficient flushing caused by single parameter control, balances the cleaning effect of the interception screen plate 4 and the water resource / energy consumption cost, and improves the economy and stability of the interception system operation.

[0130] The decision module includes:

[0131] At least two key parameters that affect the flushing demand are defined, and a preset weight factor is assigned to each key parameter; for example, the key parameters that affect the flushing demand are defined: liquid level difference, weight factor is 0.4; cylinder speed, weight factor is 0.3; influent suspended solid concentration, weight factor is 0.3.

[0132] The current value of each key parameter is collected in real time, the key parameter deviation is calculated, and the comprehensive control index is generated combined with the weight factor; for example, the control center collects the parameter values in real time, calculates the parameter deviation, such as liquid level difference deviation = current liquid level difference / threshold value 0.3 m, and sums up after multiplying the corresponding weight factor to obtain the comprehensive flushing demand index.

[0133] The operation parameters of the flushing device 8 are automatically adjusted according to the comprehensive control index, including but not limited to the start time and the operation duration. For example, when the comprehensive flushing demand index ≥ 1.0, the flushing device 8 is automatically started, and the flushing duration is linearly increased with the index value, such as 10 s for index 1.0 and 15 s for index 1.5.

[0134] The decision module assigns a preset weight factor to each key parameter, which is determined according to the influence degree of each key parameter on the urgency of flushing demand. The specific implementation includes:

[0135] Parameter influence degree evaluation: The correlation between each key parameter and the risk of intercepting screen plate 4 blockage is statistically analyzed through historical operation data. For example, the blockage probability increases by 20% for every 0.1 m increase in liquid level difference, and the blockage probability decreases by 10% for every 0.5 r / min increase in rotation speed. The higher the correlation, the greater the weight.

[0136] Typical key parameters and weight factor examples are as follows,

[0137]

[0138] Dynamic adjustment mechanism: The weight factor can be modified through the input unit of the control center or automatically updated according to the season and the degree of equipment aging. According to the automatic update, when the clock of the control center is in April to September or July to August, the weight of the suspended solid concentration is increased to 0.2 when the suspended solid concentration is high; and the weight of the liquid level difference is increased to 0.7 when the intercepting screen plate 4 is worn out. Specifically, when the abnormal decrease in the adhesion pressure of the scraper 4-1, the frequency deviation of the vibration characteristics, the increase in the load fluctuation of the motor 10, and / or the confirmation of the wear of the intercepting screen plate 4 by shutdown maintenance, the weight of the liquid level difference is increased to 0.7.

[0139] The calculation of the key parameter deviation degree is the difference between the current parameter value and the target threshold value, which is used to quantify the correlation between a single key parameter and the flushing demand. The calculation steps are as follows:

[0140] Definition of target threshold value: A safe threshold value that does not require flushing is set for each key parameter, such as a liquid level difference threshold value D0 = 0.3 m and a speed threshold value N0 = 1.0 r / min.

[0141] Calculation of absolute deviation: , x 当前 is the real-time acquisition value, and x0 is the safe threshold value. If Δx ≤ 0, the deviation degree is 0, and no flushing is required.

[0142] Normalization processing: The absolute deviation is converted into a dimensionless deviation degree, which is in the range of [0, 1], , x max is the maximum critical value of the parameter, such as the liquid level difference x max= 0.6m, the upper limit of the deviation is (0.6-0.3) / (0.6-0.3)=1.

[0143] Current liquid level difference D 当前 = 0.45m, threshold D0=0.3m, maximum critical value D max = 0.6m, .

[0144] The comprehensive control index is generated by combining the weight factor, which is the weighted sum of the deviation of each key parameter and the corresponding weight, and the formula is,

[0145] ,

[0146] The value range of the comprehensive control index is [0, 1], 0 means no need to flush, and 1 means the need for maximum intensity flushing. For example, the liquid level difference deviation is 0.5, the weight is 0.6, the rotation speed deviation is 0.2, and the weight is 0.3, then: comprehensive control index = 0.5x0.6+0.2x0.3=0.3+0.06=0.36.

[0147] According to the comprehensive control index, the operating parameters of the flushing device 8 are automatically adjusted, specifically, according to the value of the comprehensive control index, the operating parameters of the flushing device 8 are adjusted in stages,

[0148] Staged threshold setting:

[0149] Low demand: comprehensive control index <0.3, no flushing or short flushing, short flushing can be 5s;

[0150] Medium demand: 0.3≤comprehensive control index <0.7, regular flushing, which can be 10s;

[0151] High demand: comprehensive control index ≥0.7, intensive flushing, which can be 20s, interval shortened by 50%.

[0152] Here, according to the value of the comprehensive control index, the operating parameters of the flushing device 8 are adjusted in stages,

[0153] When the comprehensive control index is 0.36, it is medium demand, and the control center sends instructions to the flushing device 8: open the high-pressure nozzle, flush for 10s, and the interval is 30min;

[0154] If the comprehensive control index rises to 0.8, it is high demand at this time, and the instruction is updated to: open all the nozzles, flush for 20s, and the interval is 15min.

[0155] After flushing, the real-time monitoring of the liquid level difference, if the comprehensive control index decreases to 0.2 or less, the corresponding parameter weight is reduced, such as the liquid level difference weight from 0.6 to 0.5, to avoid over-flushing.

[0156] The suspended solid interception system further comprises a distributed cooperative control network, the cooperative control network comprising a master node and at least two sub-nodes, each sub-node corresponding to an independent interception processing unit; the master node and the interception processing units of the at least two sub-nodes jointly constitute the suspended solid interception system.

[0157] Each interception processing unit has independent suspended solid interception capability, comprising basic components such as a casing 2, a hollow rotating cylinder 5, an arc-shaped interception piece 3, an interception net plate 4, a screw conveying device 6, an elastic vibration piece 7, and a flushing device 8, and is equipped with an independent control center for real-time monitoring and adjusting the operating parameters of the interception processing unit.

[0158] When any sub-node detects an abnormal operating state, a state abnormality instruction is generated and sent to the master node, the instruction containing the real-time operating data of the sub-node; that is, when the control center of any subsystem determines that the interception net plate 4 of the interception processing unit is blocked, the liquid level difference is greater than or equal to 0.3 m, a blockage state instruction is generated, and the instruction and a snapshot of the historical optimal operating parameters of the interception processing unit are sent to the control center of the master node. Each sub-node monitors the operating state of the interception processing unit in real time, and the monitoring parameters cover multiple key indicators, such as the rotating speed of the hollow rotating cylinder 5, the working pressure of the screw conveying device 6, the opening frequency of the flushing device 8, the liquid level difference before and after the grid, and the suspended solid concentration of the incoming water. When any sub-node detects that the operating parameters of the interception processing unit exceed the preset normal range, it is determined that an abnormal operating state occurs. For example, a sub-node detects that the liquid level difference before and after the grid suddenly rises to 0.5 m, far exceeding the normal threshold of 0.3 m, and the rotating speed of the hollow rotating cylinder 5 fluctuates obviously, at which time the sub-node immediately generates a state abnormality instruction. The state abnormality instruction not only contains the identification information of the abnormal state, but also integrates the real-time operating data of the sub-node, such as the current liquid level difference, rotating speed, and suspended solid concentration of the incoming water.

[0159] The main node compares the real-time running data of the abnormal sub-node with the reference running data of other normal sub-nodes, and screens the reference sub-node with the highest matching degree; that is, the control center of the main node compares the current parameter set of the interception system of the blocked sub-node with the real-time parameter set of the interception system of other normal running sub-nodes, and screens the subsystem with the highest similarity as the reference; after receiving the state abnormal instruction sent by the sub-node, the main node quickly starts the data analysis and decision-making process: first, the main node compares the real-time running data of the abnormal sub-node with the reference running data of other normal sub-nodes, and the similarity comparison here can adopt a multi-dimensional analysis method to quantitatively compare each parameter in the real-time running data. For example, for the parameter of the rotating hollow cylinder 5 speed, the deviation degree of the abnormal sub-node speed and the speed of each normal sub-node is calculated; for the liquid level difference parameter, the difference in change trend with the normal sub-node is analyzed. By comprehensively considering the similarity of multiple parameters, the overall similarity of the abnormal sub-node and each normal sub-node is calculated by using a preset algorithm model (such as weighted average method, different weights are given according to the importance of different parameters to system operation). The preset algorithm model can be a weighted average algorithm model, and different weights are given according to the importance of different parameters to system operation. Based on the similarity calculation result, the main node screens the reference sub-node with the highest matching degree, and the running state of the reference sub-node is considered to be closest to the normal running state of the abnormal sub-node under the current circumstances;

[0160] The running parameters of the reference sub-node with the highest matching degree are issued to the interception system of the blocked sub-node as emergency adjustment parameters, and the interception systems of other sub-nodes are controlled to share the water inflow load. The main node generates a cooperative adjustment instruction based on the running parameters of the reference sub-node and issues it to the abnormal sub-node. The cooperative adjustment instruction is formulated according to the specific abnormal situation of the abnormal sub-node and the running parameters of the reference sub-node, and is used to help the abnormal sub-node recover to the normal running state. For example, when the rotating hollow cylinder 5 speed of the abnormal sub-node is too low, the main node cooperative adjustment instruction includes increasing the speed to the speed level of the reference sub-node, and correspondingly adjusting the working pressure of the screw conveyor 6 and the opening frequency of the flushing device 8. At the same time, the main node distributes additional processing load according to the current running state and processing capacity of each sub-node. For sub-nodes with strong processing capacity and low current load, the main node will instruct them to appropriately increase the processing flow to reduce the burden of the abnormal sub-node. For example, the main node adjusts the water inlet valve opening degree to divert part of the sewage originally flowing to the abnormal sub-node to other sub-nodes for treatment, ensuring the stable operation of the entire suspended solid interception system and avoiding the decline of the overall processing efficiency of the system due to the abnormality of a single sub-node.

[0161] Through the distributed cooperative control network, the suspended solid interception system can quickly respond to and effectively deal with the abnormal operation state of the sub-nodes, improve the overall stability and processing efficiency of the system, and provide more reliable protection for the sewage treatment process.

[0162] The contact area of the interception net plate 4 and the arc-shaped interception member 3 is provided with a pressure sensing component:

[0163] The pressure sensing component collects real-time pressure distribution information of the contact of the two and sends it to the control center;

[0164] The control center analyzes the similarity of the real-time pressure distribution information and the initial pressure distribution template to determine the pressure distribution deviation degree;

[0165] When the deviation degree exceeds the preset range, the control preset execution mechanism adjusts the pressure distribution state of the contact area.

[0166] The pressure sensing component can be a micro pressure sensor array arranged on the inner edge stainless steel slide 4-3 of the interception net plate 4, which is used to collect the fitting pressure distribution data between the scraper 4-1 and the arc-shaped interception member 3, i.e. the pressure distribution information.

[0167] The control center includes an initial pressure distribution template, which is a uniform pressure distribution template stored during system debugging. The control center performs similarity analysis, specifically, calculates the pressure deviation similarity, such as the mean square error of each sensor pressure value and the template. When the similarity is less than the preset threshold of 90%, the fine adjustment mechanism of the slide 4-3 position is automatically started to adjust the angle of the scraper 4-1 until the pressure distribution similarity is restored to above the threshold, realizing the dynamic calibration of the fitting pressure of the scraper 4-1, and solving the problem of poor fitting of the scraper 4-1 and the decrease of interception efficiency caused by long-term operation of the mechanical wear.

[0168] The control center also includes a visual display unit, which is configured to:

[0169] Real-time acquisition of the running state data of each component of the system and generation of the corresponding current state view;

[0170] Retrieve a typical working condition view template from the historical database, which contains the data distribution characteristics under standard running state;

[0171] Compare the current state view with the typical working condition view template through color coding, such as red for over threshold and green for optimal, display the deviation area through the preset state identification rule, and generate optimization suggestions.

[0172] When a parameter deviates from the snapshot data by more than a preset range, the deviation area is automatically marked and adjustment strategies are recommended, such as "liquid level difference is high, it is recommended to increase the rotating speed to 1.2 r / min".

[0173] The visualization display unit converts abstract operation data into a visual snapshot comparison interface, solving the problem of scattered data in traditional systems and the difficulty for operation and maintenance personnel to quickly determine the optimization direction.

[0174] A suspended solid interception system and method, which realizes:

[0175] Efficient interception, through the hollow rotating cylinder 5 in the casing 2, combined with the square interception net plate 4 and the arc-shaped interception piece 3 distributed at intervals, the outer scraper 4-1 of the net plate and the arc-shaped interception piece 3 cooperate to achieve efficient interception and secondary scraping of suspended solids. At the same time, the gap of the arc-shaped interception piece 3 is ≤1mm, and the mesh size of the interception net plate 4 is matched, which can accurately intercept small suspended solids, greatly improve the interception efficiency, and ensure the stability of the subsequent processing process.

[0176] Self-cleaning and anti-clogging, the elastic vibration piece 7 uses an adjusting spring. When the interception net plate 4 rotates to the top end, the spring vibration promotes the solid to fall off, preventing it from adhering and accumulating. The high-pressure nozzle of the flushing device 8 intelligently opens the flushing according to the cylinder speed or liquid level difference, timely removes the residual impurities, ensures the interception performance of the net plate, and prolongs the service life of the equipment.

[0177] Intelligent self-adaptation, the historical working condition storage unit and the parameter self-adaptation unit of the control center cooperate with each other. Through multi-dimensional similarity calculation, the real-time operation parameters are compared with the historical optimal parameter template, and the operation parameters are adjusted according to the results, so that the system can adapt to different water quality and quantity. Multi-dimensional similarity calculation adopts a parameter subset mode, dynamically determines the similarity according to the parameter correlation, and accurately evaluates the working condition matching degree. The dynamic weight fusion rule further optimizes the system, so that it can flexibly cope with complex environments and always maintain the optimal operating state.

[0178] Fault early warning and processing, the fault early warning unit collects real-time equipment operation data, compares them with historical fault templates, and triggers response strategies when the similarity meets the standard, so as to discover and handle potential faults in advance and reduce downtime and maintenance costs.

[0179] Environmentally friendly and convenient maintenance, the closed casing 2 structure is equipped with a deodorizing interface and a detachable maintenance cover to prevent odor leakage, facilitate equipment maintenance and repair, and meet environmental protection requirements. Modular design facilitates component disassembly and replacement, improving system maintainability.

[0180] The above is the description of the preferred embodiments of the present application, which can help the skilled in the art to more fully understand the technical solutions of the present application. However, these embodiments are only illustrative, and the specific implementation of the present application should not be limited to the description of these embodiments. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions and transformations can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. A suspended solids interception system characterized by, The utility model relates to a sewage interception system, comprising, A shell is internally provided with a hollow rotating cylinder and an arc-shaped interception member; At least two interception net plates are installed on the hollow rotating cylinder at intervals, and the outer end of the interception net plate is provided with a scraper for scraping the trapped substances on the arc-shaped interception member; A spiral conveying device is arranged in the hollow rotating cylinder for conveying and pressing the trapped substances; The shell is provided with an elastic vibration member and a flushing device, the elastic vibration member is used to vibrate the interception net plate passing through the rotation to fall off the trapped substances, the trapped substances falling off the interception net plate enter the inside of the hollow rotating cylinder, the spiral conveying device presses and conveys the trapped substances out of the interception system, and the flushing device is used to clean the interception net plate; A control center is used to adjust the working parameters of the hollow rotating cylinder, the spiral conveying device and the flushing device; The sewage enters the shell, the interception net plate intercepts the suspended solids in the water, the trace suspended solids not intercepted are secondarily intercepted when flowing through the arc-shaped interception member, the scraper scrapes the trapped substances on the surface of the arc-shaped interception member into the water, and the trapped substances are fished again by the subsequent interception net plate.

2. The suspended solids interception system of claim 1, wherein, The interception net plate is in a square structure, the number is 2-8, and the interception net plates are uniformly and interval distributed along the circumference of the hollow rotating cylinder.

3. The suspended solids interception system of claim 1, wherein, The gap width of the grid bars of the arc-shaped interception member is less than or equal to 1 mm, and the mesh aperture of the interception net plate is matched with the gap width of the grid bars of the arc-shaped interception member.

4. The suspended solids interception system of claim 1, wherein, The elastic vibration member is installed at the top end of the shell and is in contact with the inner edge of the interception net plate, when the interception net plate rotates to the top end position along with the hollow rotating cylinder, the elastic vibration member is elastically deformed under pressure and releases vibration.

5. The suspended solids interception system of claim 1, wherein, The flushing device comprises at least two rows of high-pressure water nozzles, the high-pressure water nozzles are installed on the inner side of the outer frame of the shell and face the surface of the interception net plate, and the control center controls the opening time and flushing time of the high-pressure water nozzles according to the rotating speed of the hollow rotating cylinder or the liquid level difference before and after the grid.

6. The suspended solids interception system of claim 1, wherein, The interception net plate is fixedly connected with the non-hollow area of the hollow rotating cylinder through a smooth steel plate, the inner edge of the interception net plate is provided with a stainless steel slide, the slide assists the suspended solids on the interception net plate to slide into the hollow rotating cylinder, the scraper is made of wear-resistant rubber or metal material and is attached to the surface of the arc-shaped interception member.

7. The suspended solids interception system of claim 1, wherein, The shell is in a closed structure, a detachable maintenance cover is arranged at the top, and a deodorization interface is arranged on the side surface, the deodorization interface is communicated with a deodorization system.

8. The suspended solids interception system of claim 1, wherein, The control center further comprises a historical working condition storage unit and a parameter self-adaptive unit, The historical working condition storage unit is used to store historical optimal parameter templates of the interception system under different running scenes, and the templates contain multi-dimensional associated data representing the running state; The parameter self-adaptive unit obtains a real-time running parameter set of the current interception system, performs multi-dimensional similarity calculation on the real-time running parameter set and a reference parameter set in the historical optimal parameter template, determines the historical working condition with the highest matching degree, and adjusts the running parameters of the current interception system based on the parameters corresponding to the historical working condition with the highest matching degree.

9. The suspended solids interception system of claim 8, wherein, The real-time operation parameter set and the reference parameter set each include a first parameter subset and a second parameter subset, the first parameter subset is a parameter set representing external environment characteristics, and the second parameter subset is a parameter set representing device operation states; The multi-dimensional similarity calculation includes similarity calculation of the first parameter subset of the real-time operation parameter set and the first parameter subset of the reference parameter set and similarity calculation of the second parameter subset of the real-time operation parameter set and the second parameter subset of the reference parameter set, and the results are fused into a comprehensive similarity according to a preset rule.

10. The suspended solids interception system of claim 9, wherein, The similarity calculation of the first parameter subset of the real-time operation parameter set and the first parameter subset of the reference parameter set adopts a numerical similarity algorithm, including: For each parameter in the first parameter subset of the preprocessed real-time operation parameter set, the deviation degree of the parameter from a corresponding parameter in the first parameter subset of the reference parameter set is calculated; According to the influence weight of each parameter on the interception system operation, the deviation degrees are weighted and summed to obtain a first-dimensional similarity.

11. The suspended solids interception system of claim 9, wherein, The similarity calculation of the second parameter subset of the real-time operation parameter set and the second parameter subset of the reference parameter set adopts a vector similarity algorithm, including: The second parameter subset of the preprocessed real-time operation parameter set and the second parameter subset of the reference parameter set are respectively represented as multi-dimensional vectors; The direction consistency measure value and / or distance proximity measure value of the multi-dimensional vector corresponding to the second parameter subset of the real-time operation parameter set and the multi-dimensional vector corresponding to the second parameter subset of the reference parameter set are calculated; The direction consistency measure value and / or distance proximity measure value are normalized to a preset similarity interval; According to the correlation characteristics among the parameters in the second parameter subset of the real-time operation parameter set, at least one of the following modes is dynamically selected to determine a second-dimensional similarity: When there is strong correlation among the parameters, the normalized direction consistency measure value is taken as the second-dimensional similarity; When there is weak correlation among the parameters, the normalized distance proximity measure value is taken as the second-dimensional similarity; When there is mixed correlation among the parameters, the normalized direction consistency measure value and the distance proximity measure value are fused by a preset fusion rule to obtain the second-dimensional similarity.

12. The suspended solids interception system of claim 11, wherein, The preset fusion rule includes dynamic weight fusion, specifically: A fusion coefficient β is defined, and the value range of the fusion coefficient is 0-1, and the fusion coefficient is used to adjust the weight proportion of the first-dimensional similarity and the second-dimensional similarity; When the system detects that the external environment disturbance intensity exceeds a preset threshold, the value of β increases, and the first-dimensional similarity is preferentially relied on; When the system detects that the device operation state deviates from the initial calibration value, the value of β decreases, and the second-dimensional similarity is preferentially relied on; The comprehensive similarity S is equal to β times the first-dimensional similarity plus (1-β) times the second-dimensional similarity.

13. The suspended solids interception system of claim 1, wherein, The control center further includes a fault early warning unit, which collects real-time operation characteristic data of the device and extracts a typical fault characteristic template from a historical database, compares the real-time operation characteristic data with the typical fault characteristic template in similarity, and generates a fault early warning signal and triggers a preset coping strategy when the similarity reaches a preset threshold.

14. A method of intercepting suspended solids, applied to a system for intercepting suspended solids according to any one of claims 1-13, characterized in that, The method includes the following steps, The raw sewage flows through the fluid passage provided with the intercepting screen plate, the intercepting screen plate is driven to rotate, the outer end scraper of the intercepting screen plate is in contact with the surface of the arc-shaped intercepting member, and the suspended solids intercepted by the arc-shaped intercepting member are removed; When the rotating intercepting screen plate rotates to the preset station, the intercepting screen plate is vibrated by the elastic vibration member, and the suspended solids attached to the surface of the intercepting screen plate are shaken off to the inside of the hollow rotating cylinder; The spiral conveying device inside the hollow rotating cylinder conveys the shaken-off suspended solids to the discharge port, and the suspended solids are discharged after being dewatered during the conveying process; The control center monitors the running state parameters of the intercepting screen plate or the resistance parameters of the fluid passage, and when the parameters reach the preset threshold, the flushing device is started to clean the interception surface of the intercepting screen plate.

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