A magnetic powder recovery device for sewage treatment

Abstract

The present invention belongs to the technical field of sewage treatment, and discloses a magnetic powder recovery device for sewage treatment, comprising: a frame; a chassis fixedly installed at the upper end; a cover body movably installed at the top of the chassis; a magnetic powder recovery assembly arranged inside the chassis for adsorbing magnetic powder in the sludge entering the inside of the chassis; a sludge distribution assembly arranged on one side inside the chassis for evenly distributing the sludge entering the inside of the chassis onto the magnetic powder recovery assembly; and a control system integrally arranged on the chassis for controlling the stable operation of the magnetic powder recovery device. By setting up the control system, the present invention can accurately adjust the magnetic field parameters based on the prediction of historical data to make it adapt to different sludge characteristics, ensure the efficient separation of magnetic powder, and avoid unnecessary high-load operation by optimizing the magnetic field parameters, thereby prolonging the service life of the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and particularly relates to a magnetic powder recovery device for sewage treatment. Background Art

[0002] Magnetic powder recovery devices play a crucial role in the fields of environmental protection and resource recovery. With the continuous advancement of industrialization, a large amount of sludge or wastewater containing magnetic particles generated in industries such as sewage treatment, mineral processing, and metallurgy requires effective separation and recovery technologies. Although existing technologies meet the requirements to a certain extent, there are still many deficiencies in terms of treatment efficiency, recovery rate, energy consumption, and operation convenience.

[0003] For example, the Chinese patent with the authorization announcement number CN216191298U discloses a magnetic powder recovery device, which includes a machine shell, a water inlet and a sludge outlet opened on the machine shell. The material output end of the water inlet is provided with an internal magnetic strip and a magnetic drum driven by a power source. A spray head is arranged above the magnetic drum corresponding to the sludge outlet. A scraper is fitted to the outer wall of the magnetic drum outside the spray head, and its output is connected to a magnetic powder recovery device; the magnetic strips are axially distributed and radially spaced outside the cam. The cam is axially arranged in the magnetic drum and is assembled with a clearance from its inner wall. The cam is connected to an adjustment device for adjusting its radial distance from the inner wall of the magnetic drum. This patent solves the problems such as the complex structure of the magnetic force adjustment mechanism of the magnetic drum in the prior art, and has the advantages of compact structure, stable operation, high reliability, and good recovery effect of magnetic powder.

[0004] The above patent still has the following problems:

[0005] Existing magnetic powder recovery devices usually use a constant magnetic field and cannot be adjusted according to the change of the magnetic powder content in the sludge, resulting in low separation efficiency. Especially when the magnetic powder content is low or the sludge flow rate is large, the recovery effect is not good; the operation and maintenance of existing devices are relatively complex. Especially when facing diverse sludge characteristics, adjusting parameters such as the magnetic field intensity and the rotation speed of the magnetic roller requires manual intervention, increasing the operation difficulty and maintenance cost; due to the lack of dynamic adjustment ability, existing magnetic powder recovery devices are difficult to cope with the changes of different sludge characteristics, limiting their application in complex industrial environments, and having a low degree of intelligence, which needs to be improved. Summary of the Invention

[0006] The purpose of the present invention is to provide a magnetic powder recovery device for sewage treatment to solve the technical problems proposed in the existing background art.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A magnetic powder recovery device for sewage treatment, comprising: a chassis; a magnetic powder recovery component, disposed inside the chassis, for adsorbing magnetic powder in the sludge entering the inside of the chassis; a sludge distribution component, disposed on one side inside the chassis, for evenly distributing the sludge entering the inside of the chassis onto the magnetic powder recovery component; a control system, integrally disposed on the chassis, for controlling the stable operation of the magnetic powder recovery device;

[0008] The control system includes:

[0009] A data acquisition module, configured to acquire a historical training data set of the magnetic powder recovery device. The historical training data set includes comprehensive influence parameters and a magnetic field parameter set. Convert the magnetic field parameter set into parameter numbers, where the parameter numbers are i = 1, 2, 3....n, and n represents the total number of parameter numbers;

[0010] A parameter prediction module, based on the historical training data set, trains and predicts a machine learning model of the parameter numbers, acquires real-time comprehensive influence parameters, and predicts the parameter numbers based on the trained machine learning model, so as to obtain the magnetic field parameter set corresponding to the parameter numbers.

[0011] Preferably, the control system further includes:

[0012] A data acquisition module, configured to acquire in real time the comprehensive influence parameters, the magnetic field parameter set of the magnetic powder recovery device, and the flow rate of the sludge;

[0013] A data analysis module, generates a rotational speed influence coefficient according to the comprehensive influence parameters, the magnetic field parameter set, and the flow rate of the sludge, and determines and generates corresponding magnetic roller rotational speed levels according to the rotational speed influence coefficient;

[0014] A control module, controls the rotational speed of the magnetic roller according to the corresponding magnetic roller rotational speed levels.

[0015] Preferably, the magnetic powder recovery component includes: a magnetic roller, rotatably installed inside the chassis; a drive motor, disposed on one side of the chassis, and the output shaft is fixedly connected to the magnetic roller; a scraper, disposed on one side inside the chassis and in contact with one surface of the magnetic roller; a powder discharge port, disposed on one side of the chassis and communicating with the inside of the chassis, for discharging the magnetic powder on the scraper.

[0016] Preferably, the sludge distribution component includes: a sludge distribution cylinder, disposed on one side inside the chassis and arranged parallel to the magnetic roller; a sludge inlet pipe, disposed on one side outside the chassis and communicating with the inside of the sludge distribution cylinder; sludge distribution ports, arranged on one side of the sludge distribution cylinder and facing the magnetic roller.

[0017] Preferably, it further includes a spray assembly, and the spray assembly includes: a spray pipe disposed inside the chassis and above the magnetic roller; a water inlet pipe fixedly installed on one side of the spray pipe and extending outside the chassis; spray heads arranged on one side of the spray pipe and facing the magnetic roller; wherein, the spray assembly is used to spray the sludge adhering to the magnetic powder recovery assembly.

[0018] Preferably, the machine learning model for predicting the parameter number is trained as follows:

[0019] Convert the collected comprehensive influence parameters into a corresponding set of feature vectors;

[0020] Use each set of feature vectors as the input of the machine learning model, the machine learning model takes the parameter number corresponding to each set of comprehensive influence parameters as the output, takes the parameter number actually corresponding to each set of comprehensive influence parameters as the prediction target, and takes minimizing the loss function value of the machine learning model as the training target; stop training when the loss function value of the machine learning model is less than or equal to the preset target loss value.

[0021] Preferably, the parameters related to the rotational speed influence coefficient include the viscosity of the sludge, the density of the sludge, the magnetic powder content, the magnetic field strength, and the flow rate of the sludge; the rotational speed influence coefficient is obtained by performing a weighted operation on the viscosity of the sludge, the density of the sludge, the magnetic powder content, the magnetic field strength, and the flow rate of the sludge.

[0022] Preferably, the magnetic roller speed levels include a first-level speed, a second-level speed, and a third-level speed, where the first-level speed, the second-level speed, and the third-level speed increase in sequence.

[0023] Preferably, the method for judging the rotational speed influence coefficient to generate the corresponding magnetic roller speed level is as follows:

[0024] Preset the thresholds of the rotational speed influence coefficient as Zs1 and Zs2, where Zs1 < Zs2;

[0025] If Zs1 ≥ Zs, at this time, generate the third-level speed;

[0026] If Zs2 ≥ Zs > Zs1, at this time, generate the second-level speed;

[0027] If Zs > Zs2, at this time, generate the first-level speed.

[0028] Preferably, the magnetic field parameter set is {(a1, b1), (a2, b2)…, (a n , b n )}n When numbering the magnetic field parameter set, a and b can respectively correspond to the magnetic field strength and the magnetic field direction, a n , b n represent the values of the magnetic field strength and the magnetic field direction corresponding to the parameter number n.

[0029] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0030] 1. Through prediction based on historical data, the present invention can accurately adjust the magnetic field parameters to adapt to different sludge characteristics, ensuring efficient separation of magnetic powder. By optimizing the magnetic field parameters, unnecessary high-load operation can be avoided, and the service life of the equipment can be extended. The intelligent prediction system based on machine learning can make predictions and adjustments according to historical data, improving the intelligent level of the system. The system can dynamically adjust the magnetic field parameters according to real-time data and historical data to adapt to changes in sludge characteristics and maintain the stability of the separation effect.

[0031] 2. By generating corresponding rotational speed influence coefficients according to factors such as the viscosity, density, magnetic powder content, magnetic field strength, and sludge flow rate of the sludge, and dynamically adjusting the rotational speed of the magnetic roller according to the rotational speed influence coefficients, the present invention can improve the separation efficiency. An appropriate rotational speed can adsorb the magnetic powder in the sludge to the greatest extent, reduce the loss of unadsorbed magnetic powder, and thus improve the recovery rate. Dynamically adjusting the rotational speed can avoid the magnetic roller from operating at an inappropriate rotational speed, reduce mechanical wear, and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Shows a perspective view of the magnetic powder recovery device for sewage treatment of the present invention;

[0034] Figure 2 Shows a top view of the magnetic powder recovery device for sewage treatment of the present invention;

[0035] Figure 3 Shows a module structure diagram of the control system in Embodiment 2 of the present invention;

[0036] Figure 4 Shows a module structure diagram of the control system in Embodiment 3 of the present invention.

[0037] Reference numerals: 100, frame; 101, chassis; 102, sludge discharge port; 103, cover body; 104, electric push rod; 200, magnetic powder recovery assembly; 201, magnetic roller; 202, drive motor; 203, scraper; 204, powder discharge port; 300, sludge distribution assembly; 301, sludge distribution cylinder; 302, mud inlet pipe; 303, sludge distribution port; 400, spray assembly; 401, spray pipe; 402, water inlet pipe; 403, nozzle. Detailed implementation manners

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Refer to Figure 1 and Figure 2 As shown, a magnetic powder recovery device for sewage treatment includes: a frame 100, a chassis 101, a cover body 103, a magnetic powder recovery assembly 200, and a sludge distribution assembly 300, wherein the chassis 101 is fixedly installed on the frame 100; the cover body 103 is movably installed at the top end of the chassis 101, and electric push rods 104 are arranged on both sides of the chassis 101. The extending ends of the electric push rods 104 are hinged to the cover body 103. The cover body 103 can be opened or closed by extending or contracting the electric push rods 104, which is convenient for overhauling the inside of the chassis 101. A sludge discharge port 102 is opened at the bottom end of the chassis 101 for discharging sludge; the magnetic powder recovery assembly 200 is arranged inside the chassis 101 for adsorbing magnetic powder in the sludge entering the inside of the chassis 101; the sludge distribution assembly 300 is arranged on one side inside the chassis 101 for evenly distributing the sludge entering the inside of the chassis 101 onto the magnetic powder recovery assembly 200;

[0041] In this embodiment, the sludge containing magnetic powder can be evenly distributed on the magnetic powder recovery assembly 200 through the sludge distribution assembly 300, and the magnetic powder in the sludge can be adsorbed and recovered by the magnetic powder recovery assembly 200. When it is necessary to overhaul the inside of the chassis 101, the cover body 103 can be opened by extending the electric push rods 104, so that the overall flexibility of the device is better and it is convenient to use.

[0042] Specifically, refer to Figure 2As shown in the figure, the magnetic powder recovery assembly 200 includes: a magnetic roller 201, a drive motor 202, a scraper 203, and a powder discharge port 204. Among them, the magnetic roller 201 is rotatably installed inside the chassis 101; the drive motor 202 is arranged on one side of the chassis 101, and the output shaft is fixedly connected to the magnetic roller 201; the scraper 203 is arranged on one side inside the chassis 101 and contacts the surface of one side of the magnetic roller 201; the powder discharge port 204 is arranged on one side of the chassis 101 and communicates with the inside of the chassis 101. One end of the scraper 203 extends into the powder discharge port 204 for discharging the magnetic powder on the scraper 203.

[0043] In this embodiment, the drive motor 202 can be used to drive the magnetic roller 201 to rotate. When the magnetic roller 201 rotates, the magnetic powder in the sludge can be adsorbed, so that the magnetic powder adheres to the magnetic roller 201. When the magnetic powder adhering to the magnetic roller 201 moves to one side of the scraper 203 following the magnetic roller 201, the scraper 203 can scrape off the magnetic powder on the magnetic roller 201, and the magnetic powder slides along the scraper 203 to the powder discharge port 204, and the magnetic powder is discharged through the powder discharge port 204.

[0044] Specifically, referring to Figure 2 As shown in the figure, the sludge distribution assembly 300 includes: a sludge distribution cylinder 301, a sludge inlet pipe 302, and a sludge distribution port 303. Among them, the sludge distribution cylinder 301 is arranged on one side inside the chassis 101 and is arranged parallel to the magnetic roller 201; the sludge inlet pipe 302 is arranged on one side outside the chassis 101 and communicates with the inside of the sludge distribution cylinder 301; the sludge distribution ports 303 are arranged in a row on one side of the sludge distribution cylinder 301 and face the magnetic roller 201.

[0045] In this embodiment, the sludge can be fed into the sludge distribution cylinder 301 through the sludge inlet pipe 302, and then the sludge in the sludge distribution cylinder 301 is evenly sprayed onto the surface of the magnetic roller 201 through a plurality of sludge distribution ports 303, so that the magnetic powder in the sludge adheres to the magnetic roller 201. The sludge slides along the magnetic roller 201 into the chassis 101 and is discharged through the sludge discharge port 102.

[0046] Specifically, referring to Figure 2 As shown in the figure, it further includes a spray assembly 400. The spray assembly 400 includes: a spray pipe 401, a water inlet pipe 402, and a nozzle 403. Among them, the spray pipe 401 is arranged inside the chassis 101 and is located above the magnetic roller 201; the water inlet pipe 402 is fixedly installed on one side of the spray pipe 401 and extends to the outside of the chassis 101 for feeding spray water into the spray pipe 401; the nozzles 403 are arranged in a row on one side of the spray pipe 401 and face the magnetic roller 201. Among them, the spray assembly 400 is used to spray the sludge adhering to the magnetic powder recovery assembly.

[0047] In this embodiment, the spray water can be input into the spray pipe 401 through the water inlet pipe 402, and then the spray water can be evenly sprayed onto the surface of the magnetic roller 201 through a plurality of nozzles 403, so as to wash the surface of the magnetic roller 201, wash away the sludge attached to the surface of the magnetic roller 201, lubricate the magnetic roller 201, reduce the wear between the scraper 203 and the magnetic roller 201. At the same time, a plurality of nozzles 403 can disperse the pressure of the spray water to avoid spraying off the magnetic powder on the magnetic roller 201, effectively clean the surface of the magnetic roller 201, and avoid excessive sludge attachment, affecting the magnetic adsorption effect.

[0048] Working principle: During operation, the driving motor 202 is started to drive the magnetic roller 201 to rotate. At this time, the sludge can be fed into the sludge distribution cylinder 301 through the sludge inlet pipe 302, and then the sludge in the sludge distribution cylinder 301 is evenly sprayed onto the surface of the magnetic roller 201 through a plurality of sludge distribution ports 303, so that the magnetic powder in the sludge adheres to the magnetic roller 201. The sludge slides along the magnetic roller 201 into the chassis 101 and is discharged through the sludge discharge port 102. At this time, the water inlet pipe 402 inputs the spray water into the spray pipe 401, and then the spray water is evenly sprayed onto the surface of the magnetic roller 201 through a plurality of nozzles 403, so as to wash the surface of the magnetic roller 201, wash away the sludge attached to the surface of the magnetic roller 201, lubricate the magnetic roller 201, reduce the wear between the scraper 203 and the magnetic roller 201. At the same time, a plurality of nozzles 403 can disperse the pressure of the spray water to avoid spraying off the magnetic powder on the magnetic roller 201, effectively clean the surface of the magnetic roller 201, and avoid excessive sludge attachment, affecting the magnetic adsorption effect. When the magnetic powder attached to the magnetic roller 201 moves to one side of the scraper 203 following the magnetic roller 201, the scraper 203 can scrape off the magnetic powder on the magnetic roller 201 and slide along the scraper 203 to the powder discharge port 204, and the magnetic powder is discharged through the powder discharge port 204, thus realizing the recovery of the magnetic powder in the sludge, with high recovery efficiency and convenient use.

[0049] Embodiment 2

[0050] Refer to Figure 3 As shown, it further includes a control system for controlling the stable and efficient operation of the magnetic powder recovery device. The control system includes: a data acquisition module and a parameter prediction module, and the modules are connected by wired / wireless means to realize data transmission;

[0051] The data acquisition module is used to collect the historical training data set of the magnetic powder recovery device. The historical training data set includes comprehensive influence parameters and a magnetic field parameter set. The magnetic field parameter set is converted into parameter numbers, and the parameter numbers are i = 1, 2, 3....n, where n represents the total number of parameter numbers;

[0052] Specifically, the comprehensive influence parameters include the viscosity, density, and magnetic powder content of the sludge;

[0053] The viscosity of the sludge refers to the ease with which the sludge entering the magnetic powder recovery device flows. High-viscosity sludge will slow down the flow and dispersion of the magnetic powder, and a stronger magnetic field is required to overcome this resistance to ensure that the magnetic powder can be effectively attracted and collected; low-viscosity sludge has better fluidity, and a weaker magnetic field may be needed, but the magnetic field direction may need to be adjusted to prevent the magnetic powder from moving too fast and not being completely separated, which can be obtained in real time through a viscosity sensor.

[0054] The density of the sludge refers to the density of the sludge entering the magnetic powder recovery device. The density of the sludge is affected by solid particles, liquid content, and other components. The magnetic powder in high-density sludge is more difficult to suspend and separate, and a stronger magnetic field is required to effectively extract the magnetic powder. The magnetic powder in low-density sludge is easily dispersed, and the magnetic field intensity can be relatively low, but the magnetic field direction needs to be adjusted to optimize the separation effect; the density of the sludge can be obtained in real time through a density sensor.

[0055] The magnetic powder content refers to the proportion of magnetic particles contained in the sludge. A high magnetic powder content means a higher concentration of magnetic substances in the sludge. Sludge with a high magnetic powder content requires a stronger magnetic field intensity to ensure that all magnetic powder can be effectively attracted and separated. In the case of a low magnetic powder content, the magnetic field intensity can be appropriately reduced, but the magnetic field direction needs to be precisely controlled to ensure effective separation; the magnetic powder content in the sludge can be detected and obtained in real time through a Hall effect sensor, an inductive sensor, etc.

[0056] The set of magnetic field parameters is {(a1,b1),(a2,b2)…,(a n ,b n )};

[0057] Exemplarily, when numbering the set of magnetic field parameters, a and b can respectively correspond to the magnetic field intensity and the magnetic field direction. a n ,b n represents the values of the magnetic field intensity and the magnetic field direction corresponding to when the parameter number is n.

[0058] The parameter prediction module trains and predicts a machine learning model of the parameter number based on the historical training data set, collects real-time comprehensive influence parameters, and predicts the parameter number based on the trained machine learning model, so as to obtain the set of magnetic field parameters corresponding to the parameter number;

[0059] Specifically, the training method of the machine learning model for predicting the parameter number is as follows:

[0060] Convert the collected comprehensive influence parameters into a corresponding set of feature vectors;

[0061] Use each group of feature vectors as the input of the machine learning model. The machine learning model takes the parameter number corresponding to each group of comprehensive influence parameters as the output, takes the parameter number actually corresponding to each group of comprehensive influence parameters as the prediction target, and takes minimizing the loss function value of the machine learning model as the training target; stop training when the loss function value of the machine learning model is less than or equal to the preset target loss value.

[0062] The machine learning model can be one of models such as SVM regression, random forest regression or neural network regression;

[0063] The loss function value of the machine learning model is the mean square error;

[0064] The mean square error is one of the commonly used loss functions. By minimizing the loss function formula as the target to train the model, the machine learning model can better fit the data, thereby improving the performance and accuracy of the model;

[0065] In the loss function, MSE is the loss function value of the machine learning model, x is the group number of feature vectors; m is the number of groups of feature vectors; y x is the parameter number predicted for the x-th group of feature vectors, is the parameter number actually corresponding to the x-th group of feature vectors;

[0066] Other model parameters of the machine learning model, the target loss value, the optimization algorithm, the proportion of the training set, test set and validation set, and the optimization of the loss function are all obtained through actual engineering implementation and continuous experimental tuning.

[0067] In this embodiment, the magnetic field strength and direction of the magnetic roller can be reasonably adjusted according to the change of the viscosity or density of the sludge in real time to ensure high magnetic powder recovery efficiency. For the adjustment of the magnetic field strength, the magnetic field strength of the magnetic roller can be changed by adjusting the power supply current; for the adjustment of the magnetic field direction, multiple electromagnets can be arranged inside the magnetic roller, and the multiple electromagnets are arranged in different directions to form an adjustable magnetic field system. By an independent power supply and a control circuit, the current direction of each electromagnet is adjusted to change the magnetic field direction (the adjustment technology of the magnetic field strength and direction is the prior art and will not be elaborated here).

[0068] Through prediction based on historical data, the magnetic field parameters can be accurately adjusted to adapt to different sludge characteristics, ensuring efficient separation of magnetic powder. By optimizing the magnetic field parameters, unnecessary high-load operation can be avoided and the service life of the equipment can be extended. The intelligent prediction system based on machine learning can make predictions and adjustments according to historical data, improving the intelligent level of the system. The system can dynamically adjust the magnetic field parameters according to real-time data and historical data to adapt to the change of sludge characteristics and maintain the stability of the separation effect.

[0069] Example 3

[0070] Refer to Figure 4 As shown, based on Example 2, the present invention further includes:

[0071] A data acquisition module for acquiring in real time the comprehensive influence parameters of the magnetic powder recovery device, the set of magnetic field parameters, and the flow rate of the sludge;

[0072] Specifically, the set of magnetic field parameters is the set of magnetic field parameters corresponding to the parameter numbers predicted in real time;

[0073] Specifically, the flow rate of the sludge refers to the amount of sludge flowing through the magnetic roller per unit time. High-flow sludge requires a faster rotation speed of the magnetic roller to handle a large amount of sludge and prevent blockage and accumulation, while low-flow sludge can use a slower rotation speed; the flow rate of the sludge can be acquired in real time through a flow meter;

[0074] A data analysis module for generating a rotation speed influence coefficient based on the comprehensive influence parameters, the set of magnetic field parameters, and the flow rate of the sludge, and judging and generating corresponding magnetic roller rotation speed levels according to the rotation speed influence coefficient;

[0075] Specifically, the generation method of the rotation speed influence coefficient is as follows:

[0076]

[0077] In the formula, Zs represents the rotation speed influence coefficient, Nd represents the viscosity of the sludge, Md represents the density of the sludge, Cf represents the magnetic powder content, Cq represents the magnetic field strength, Wl represents the flow rate of the sludge, represents the weight coefficient, which is determined by those skilled in the art according to actual needs and experience, All are greater than 0.

[0078] It should be noted that the higher the viscosity Nd of the sludge, the higher the density Md of the sludge, the higher the magnetic powder content Cf and the lower the magnetic field strength Cq, and the smaller the flow rate Wl of the sludge, the greater the corresponding rotation speed influence coefficient Zs, and the relatively slower the rotation speed of the magnetic roller, which can ensure that the magnetic powder has enough time to be adsorbed; on the contrary, the lower the viscosity Nd of the sludge, the lower the density Md of the sludge, the lower the magnetic powder content Cf and the higher the magnetic field strength Cq, and the greater the flow rate Wl of the sludge, the smaller the corresponding rotation speed influence coefficient Zs, and the relatively faster the rotation speed of the magnetic roller, improving the processing efficiency.

[0079] It should be noted that the formulas involved above are calculated by removing the dimension and taking their numerical values. They are obtained by collecting a large amount of data for software simulation to get a formula closest to the actual situation. The weight coefficients in the formula and each preset threshold value in the analysis process are set by those skilled in the art according to the actual situation or obtained through a large amount of data simulation. The magnitude of the weight coefficient is a specific value obtained by quantifying each parameter, which is convenient for subsequent comparison. Regarding the magnitude of the weight coefficient, it depends on the amount of sample data and the processing coefficients initially set by those skilled in the art for each group of sample data, as long as it does not affect the proportional relationship between the parameter and the quantified value.

[0080] The magnetic roller rotation speed levels include a first-level rotation speed, a second-level rotation speed, and a third-level rotation speed, and the first-level rotation speed, the second-level rotation speed, and the third-level rotation speed increase in sequence.

[0081] The method for judging and generating the corresponding magnetic roller rotation speed level according to the rotation speed influence coefficient is as follows:

[0082] The preset thresholds of the rotation speed influence coefficient are Zs1 and Zs2, and Zs1 < Zs2.

[0083] If Zs1 ≥ Zs, at this time, it means that the rotation speed influence coefficient is less than the threshold of the preset minimum rotation speed influence coefficient, indicating that the influence of each factor on the magnetic roller rotation speed is small, and then the third-level rotation speed is generated.

[0084] If Zs2 ≥ Zs > Zs1, at this time, it means that the rotation speed influence coefficient is greater than the threshold of the preset minimum rotation speed influence coefficient and less than the threshold of the preset maximum rotation speed influence coefficient, indicating that the influence of each factor on the magnetic roller rotation speed is moderate, and then the second-level rotation speed is generated.

[0085] If Zs > Zs2, at this time, it means that the rotation speed influence coefficient is greater than the threshold of the preset maximum rotation speed influence coefficient, indicating that the influence of each factor on the magnetic roller rotation speed is large, and then the first-level rotation speed is generated.

[0086] Exemplarily, the first-level rotation speed can be 30 revolutions per minute, the second-level rotation speed can be 60 revolutions per minute, and the third-level rotation speed can be 100 revolutions per minute; also, according to the specific situation, the rotation parameters corresponding to the magnetic roller rotation speed level can be customized.

[0087] The control module controls the rotation speed of the magnetic roller according to the corresponding magnetic roller rotation speed level.

[0088] The control system controls the drive motor according to the corresponding magnetic roller rotation speed level, and then controls the rotation speed of the magnetic roller, ensuring that the magnetic powder can be efficiently adsorbed under different conditions, and improving the overall separation efficiency and stability of the system.

[0089] In this embodiment, by generating a corresponding rotational speed influence coefficient according to factors such as the viscosity, density, magnetic powder content, magnetic field strength, and sludge flow rate of the sludge, and dynamically adjusting the rotational speed of the magnetic roller according to the rotational speed influence coefficient, the separation efficiency can be improved. Since sludges with different characteristics require different adsorption times, dynamically adjusting the rotational speed of the magnetic roller can ensure that the magnetic powder has sufficient time to be adsorbed, thereby improving the separation efficiency. Moreover, an appropriate rotational speed can adsorb the magnetic powder in the sludge to the greatest extent, reduce the loss of unadsorbed magnetic powder, and thus improve the recovery rate. Dynamically adjusting the rotational speed can avoid the magnetic roller from operating at an inappropriate rotational speed, reduce mechanical wear, and extend the service life of the equipment.

[0090] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

[0091] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A magnetic powder recovery device for sewage treatment, characterized in that: include: Chassis (101); A magnetic powder recovery component (200) is arranged inside the chassis (101) and is used to absorb magnetic powder in the sludge that enters the chassis (101); A mud distribution assembly (300) is arranged on one side of the interior of the chassis (101) and is used to evenly distribute the mud entering the interior of the chassis (101) onto the magnetic powder recovery assembly (200); A control system, integrated on the chassis (101), used to control the magnetic powder recovery device to operate stably; The control system comprises: A data acquisition module is used to acquire a historical training data set of a magnetic powder recovery device, wherein the historical training data set includes a comprehensive influencing parameter and a magnetic field parameter set, and convert the magnetic field parameter set into a parameter number, wherein the parameter number is i=1, 2, 3....n, and n represents the total number of parameter numbers; The parameter prediction module trains a machine learning model for predicting parameter numbers based on a historical training data set, collects real-time comprehensive influencing parameters, and predicts parameter numbers based on the trained machine learning model, thereby obtaining a magnetic field parameter set corresponding to the parameter number; A data acquisition module is used to obtain the comprehensive influencing parameters of the magnetic powder recovery device, a set of magnetic field parameters and the flow rate of sludge in real time; The data analysis module generates a rotation speed influence coefficient according to the comprehensive influence parameter, the magnetic field parameter set and the sludge flow rate, and generates a corresponding magnetic roller (201) rotation speed level according to the rotation speed influence coefficient; wherein the rotation speed influence coefficient is: In the formula, Zs represents the speed influence coefficient, Nd represents the viscosity of the sludge, Md represents the density of the sludge, Cf represents the magnetic powder content, Cq represents the magnetic field intensity, and Wl represents the flow rate of the sludge. represents the weight coefficient; A control module controls the rotation speed of the magnetic roller (201) according to the corresponding rotation speed level of the magnetic roller (201); The mud distributing assembly (300) comprises: a mud distributing cylinder (301), which is arranged on one side of the interior of the chassis (101) and is arranged parallel to the magnetic roller (201); a mud inlet pipe (302), which is arranged on one side of the exterior of the chassis (101) and is connected to the interior of the mud distributing cylinder (301); and mud distributing ports (303), which are arranged on one side of the mud distributing cylinder (301) and face the magnetic roller (201); mud is delivered into the interior of the mud distributing cylinder (301) through the mud inlet pipe (302), so that the sludge in the mud distributing cylinder (301) is evenly sprayed onto the surface of the magnetic roller (201) through a plurality of mud distributing ports (303).

2. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: The magnetic powder recovery assembly (200) comprises: A magnetic roller (201) is rotatably mounted inside the chassis (101); A driving motor (202) is arranged on one side of the chassis (101), and an output shaft is fixedly connected to the magnetic roller (201); A scraper (203) is arranged on one side of the interior of the chassis (101) and is in contact with a surface of one side of the magnetic roller (201); The powder discharge port (204) is arranged on one side of the chassis (101) and is communicated with the interior of the chassis (101) and is used to discharge the magnetic powder on the scraper (203).

3. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: Also included is a spray assembly (400), wherein the spray assembly (400) includes: A spray pipe (401) is arranged inside the chassis (101) and located above the magnetic roller (201); A water inlet pipe (402) is fixedly mounted on one side of the spray pipe (401) and extends to the outside of the chassis (101); A spray head (403) arranged on one side of the spray pipe (401) and facing the magnetic roller (201); The spraying component (400) is used to spray the sludge attached to the magnetic powder recovery component (200).

4. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: The training method of the machine learning model for predicting parameter numbers is as follows: Convert the collected comprehensive influencing parameters into a corresponding set of feature vectors; Each group of feature vectors is used as the input of the machine learning model. The machine learning model uses the parameter number corresponding to each group of comprehensive influencing parameters as the output, the parameter number actually corresponding to each group of comprehensive influencing parameters as the prediction target, and minimizing the loss function value of the machine learning model as the training target; When the loss function value of the machine learning model is less than or equal to the preset target loss value, training stops.

5. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: The parameters related to the rotation speed influence coefficient include sludge viscosity, sludge density, magnetic powder content, magnetic field strength and sludge flow rate; the rotation speed influence coefficient is obtained by weighted calculation of sludge viscosity, sludge density, magnetic powder content, magnetic field strength and sludge flow rate.

6. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: The magnetic roller rotation speed levels include primary rotation speed, secondary rotation speed and tertiary rotation speed, wherein the primary rotation speed, the secondary rotation speed and the tertiary rotation speed increase in sequence.

7. A magnetic powder recovery device for sewage treatment as claimed in claim 6, characterized in that: The method of determining the speed influence coefficient to generate the corresponding magnetic roller speed level is as follows: The thresholds of the preset speed influence coefficient are Zs1 and Zs2, and Zs1<Zs2; If Zs1≥Zs, then the third-level speed is generated; If Zs2≥Zs>Zs1, at this time, the secondary speed is generated; If Zs>Zs2, at this time, the first-level speed is generated.

8. A magnetic powder recovery device for sewage treatment as claimed in claim 1, characterized in that: The magnetic field parameter set is {(a1, b1), (a2, b2)…, (a n ,b n )}, when the magnetic field parameter set is numbered, a and b correspond to the magnetic field intensity and magnetic field direction respectively, a n ,b n Indicates the value of magnetic field strength and magnetic field direction when parameter number is n.

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