Ion flocculation treatment device for coal-containing wastewater

Abstract

The present application relates to the technical field of coal-containing wastewater treatment, and particularly relates to a coal-containing wastewater ion flocculation treatment device, which comprises a segmented sub-electrode assembly, a signal acquisition assembly, a feature extraction module, a flocculation regulation module, an intervention control module and a dynamic optimization module, the feature extraction module determines electrolysis abnormality features and flocculation rate features based on current signals and double-point light intensity signals; the flocculation regulation module determines a pose adjustment strategy based on the electrolysis abnormality features, adjusts the angle and immersion depth of the electrode plate through an electrode plate driving mechanism; the intervention control module executes polarity reversal, mechanical cleaning or current adjustment based on the response features after the pose adjustment; and the dynamic optimization module performs angle optimization and depth optimization on the electrode plate pose after the cleaning intervention. The present application solves the problems that the existing device cannot distinguish abnormal sources and the intervention means is single, and improves the accuracy and long-term operation stability of coal-containing wastewater flocculation treatment.

Description

Technical Field

[0001] This invention relates to the field of coal-containing wastewater treatment technology, and in particular to an ion flocculation treatment device for coal-containing wastewater. Background Technology

[0002] Coal-containing wastewater is one of the main industrial wastewaters generated by coal-related industries such as thermal power plants, coal washing plants, and coal chemical enterprises, containing a large amount of suspended coal dust particles. Electrocoagulation technology, as a wastewater treatment method that does not require the addition of external chemical flocculants, uses electrolysis to generate metal cations that collide with and aggregate coal dust particles into flocs, and has been gradually applied to the treatment of coal-containing wastewater. However, existing electrocoagulation devices generally suffer from the following problems in actual operation: when the flocculation effect deteriorates, operators cannot distinguish whether the root cause is electrode passivation, local scaling, or bubble disturbance. They can only rely on experience to take uniform adjustment measures, such as blindly increasing the electrolysis current or frequently cleaning the electrodes. This not only results in high energy consumption and rapid electrode wear, but may also lead to ineffective or even harmful operations due to misjudging the root cause.

[0003] Chinese Patent Publication No. CN120761449A discloses an electrical parameter adjustment system and method for electrocoagulation wastewater treatment, including: detecting the current impedance value of each flocculation tube; recording the duration of continuous exceedance and classifying the loss level when it exceeds the passivation upper limit; generating suggested values ​​for current density and water flow velocity; simultaneously monitoring the rate of change of current impedance value and performing feedback optimization based on the rate of change of influent and effluent turbidity. This solves the problems of how to achieve quantitative assessment and visual representation of electrode loss status in electrocoagulation equipment, and process instability caused by electrode passivation during the coordinated imbalance of multiple flocculation tube clusters.

[0004] Existing technologies suffer from the following problems: They only monitor the electrical parameters of the electrodes themselves, failing to monitor the flocculation rate—a key indicator reflecting floc growth dynamics—online. This makes it impossible to predict anomalies in advance based on flocculation kinetic parameters, constituting a delayed detection method. Anomaly diagnosis relies on a uniform assessment of the entire plate, failing to differentiate between different sub-electrode regions and thus unable to identify regional anomalies. This results in cleaning operations being limited to the entire plate, lacking specificity. Intervention methods are limited, lacking the ability to adjust the electrode position and orientation, making it difficult to address anomalies based on their root causes and post-adjustment changes. Furthermore, there is a lack of mechanisms for verifying and fine-tuning the effects of interventions, making it impossible to compensate for residual deviations after cleaning interventions. Summary of the Invention

[0005] Therefore, the present invention provides an ion flocculation treatment device for coal-containing wastewater to overcome the problems of limited intervention methods and insufficient flexibility in the electrocoagulation treatment of coal-containing wastewater in the prior art.

[0006] To achieve the above objectives, the present invention provides an ion flocculation treatment device for coal-containing wastewater, comprising: The tank is divided into an inlet distribution chamber, an electrolytic flocculation zone, a slow-flow growth zone, a sedimentation and separation zone, and an outlet zone along the water flow direction. The segmented sub-electrode assembly is installed in the electrolytic flocculation zone and consists of N columns of independently powered sub-electrode units. Each sub-electrode unit is isolated from the others by insulating partitions and is electrically led out independently. An electrode cleaning execution assembly includes a piezoelectric oscillator built into each sub-electrode and a polarity reversal circuit built into the power supply circuit of each sub-electrode, for performing a cleaning action on the plates of the segmented sub-electrode assembly. The electrode drive mechanism includes a lifting drive assembly and a rotating drive assembly for driving the segmented sub-electrode assembly to move vertically and rotate about a horizontal axis. The signal acquisition component includes a Hall current sensor for real-time acquisition of current signals of each sub-electrode, and a first transmissive light intensity pulsation sensor and a second transmissive light intensity pulsation sensor arranged at intervals along the water flow direction in the slow-flow growth zone. A feature extraction module, which is connected to the signal acquisition component, is used to determine the flocculation abnormality state of the electrolytic flocculation zone based on the analysis of the current signal and the dual-point light intensity signal. A flocculation control module, which is connected to the electrode driving mechanism and the feature extraction module respectively, is used to determine the target pose of the segmented sub-electrode assembly based on the flocculation abnormal state. An intervention control module, which is connected to the electrode cleaning execution component, the flocculation control module and the feature extraction module respectively, is used to select the corresponding electrode cleaning execution component based on the flocculation abnormal state change features after pose adjustment, so as to perform cleaning intervention. The dynamic optimization module is connected to the intervention control module, the electrode driving mechanism and the feature extraction module respectively, and is used to perform angle optimization and depth optimization starting from the current pose after cleaning intervention.

[0007] Furthermore, the feature extraction module is used to analyze the current signals of each sub-electrode, extract the high-frequency fluctuations, long-term attenuation slope and current deviation between sub-electrodes of the current signals of each sub-electrode, and determine the flocculation rate based on the dual-point light intensity signal, thereby determining the abnormal flocculation state of the electrolytic flocculation zone.

[0008] Furthermore, the abnormal flocculation states include electrode passivation, localized scaling, and bubble disturbance. The electrode passivation state is determined based on the flocculation rate continuously decreasing within a preset statistical period and the long-term decay slope of more than half of the sub-electrodes being negative. The localized scaling state is determined based on the flocculation rate being less than the rate average and the current of a single sub-electrode being lower than the current average of the segmented sub-electrode assembly. The bubble disturbance state is determined based on the standard deviation of the flocculation rate within a preset time window being greater than the rate average and more than half of the sub-electrodes experiencing high-frequency fluctuations. The flocculation control module determines the target pose based on the abnormal flocculation states.

[0009] Further, the target pose includes a first target pose, a second target pose, and a third target pose. The first target pose is determined based on the electrode passivation state, including driving the segmented sub-electrode assembly to rotate clockwise and increase the electrode immersion depth, so as to utilize air bubbles to assist in removing the passivation layer and increase the effective electrolysis area; the second target pose is determined based on the local scaling state, including driving the segmented sub-electrode assembly to rotate counterclockwise, so as to utilize water flow shear force to peel off the scaling; the third target pose is determined based on the air bubble disturbance state, including driving the segmented electrode assembly to rotate clockwise and decrease the electrode immersion depth, so as to utilize water flow to assist in carrying away air bubbles and shorten the air bubble rising distance.

[0010] Furthermore, the flocculation anomaly state change characteristics are determined based on the change in flocculation rate after pose adjustment relative to before pose adjustment, and are used to characterize the elimination of the flocculation anomaly state. The flocculation anomaly state change characteristics include a first change characteristic, a second change characteristic, and a third change characteristic. The first change characteristic is determined based on the flocculation rate remaining unchanged after pose adjustment; the second change characteristic is determined based on the change in flocculation rate after pose adjustment exceeding an amplitude threshold; and the third change characteristic is determined based on the flocculation rate changing and fluctuating after pose adjustment.

[0011] Furthermore, the cleaning action includes polarity reversal, mechanical cleaning, and current regulation. Based on the result of determining the first change characteristic, the intervention control module controls each sub-electrode to simultaneously perform polarity reversal, thereby stripping away any passivation layer or stubborn adhesion layer that may exist on the electrode surface through a reduction reaction. Based on the result of determining the second change characteristic, the sub-electrode with the largest deviation characteristic value is identified as the target sub-electrode, and a vibration trigger signal is sent to the piezoelectric oscillator of this target sub-electrode to utilize the inertia generated by high-frequency vibration to strip away the adhesion. Based on the result of determining the third change characteristic, a current regulation signal is sent to the electrolysis power supply to reduce the electrolysis current, thereby reducing the amount of bubbles generated by the electrolysis reaction. During the current reduction period, the standard deviation change of the flocculation rate is continuously monitored through the signal acquisition component. Based on the result that the standard deviation falls back below a preset fluctuation threshold, the original electrolysis current is restored.

[0012] Furthermore, the dynamic optimization module is triggered based on the pose deviation caused by the cleaning intervention, and performs angle optimization and depth optimization starting from the current pose. The angle optimization is based on the current electrode angle, adjusting along one direction; if the flocculation rate increases, it continues to adjust along that direction; if the flocculation rate decreases, it adjusts in the opposite direction. The depth optimization is based on the current electrode immersion depth, adjusting along one direction; if the flocculation rate increases, it continues to adjust along that direction; if the flocculation rate decreases, it adjusts in the opposite direction.

[0013] Furthermore, after completing a preset number of optimization rounds, the dynamic optimization module triggers the flocculation control module to re-determine the anomaly based on the result that the flocculation rate is still lower than the preset normal rate lower limit.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the present invention determines the abnormal flocculation state in the electrolytic flocculation process of the electrolytic flocculation zone by analyzing the current signal of each sub-electrode and the dual-point light intensity signal of the slow-flow growth zone, and can predict the abnormal flocculation in the electrolytic flocculation zone in advance, thereby improving the monitoring accuracy of dynamic indicators reflecting the growth of flocs. In particular, the present invention determines the target orientation based on the abnormal state of flocculation through the flocculation control module, including rotating the electrode plate clockwise or counterclockwise and increasing or decreasing the immersion depth of the electrode plate, to initially intervene in the surface state of the electrode plate, solving the problem of the lack of adjustment means in existing devices, thereby improving the accuracy of abnormal handling; In particular, the present invention, through the intervention control module, performs polarity reversal, mechanical cleaning, and current adjustment respectively based on the first, second, and third change features after pose adjustment, thereby achieving the treatment of different residual problems and solving the problem that the existing devices have a single cleaning method and cannot adapt to complex abnormal states, thus improving the pertinence and effectiveness of cleaning intervention. In particular, the present invention, through a dynamic optimization module, performs angle and depth optimization based on the pose deviation after cleaning intervention, starting from the current pose, and continues along the improvement direction, thus solving the problem that existing devices cannot optimize operating parameters, thereby improving the stability and adaptability of long-term operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the coal-containing wastewater ion flocculation treatment device of the present invention; Figure 2 This is a diagram showing the module connection relationships in an embodiment of the present invention; Figure 3 This is a schematic diagram of the lifting drive assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the rotary drive assembly according to an embodiment of the present invention; Figure 5 This is a flowchart illustrating the cleaning intervention selection process in an embodiment of the present invention.

[0016] In the diagram: 1. Inlet water distribution chamber; 2. Electrolytic flocculation zone; 3. Slow-flow growth zone; 4. Sedimentation and separation zone; 5. Outlet water zone; 6. Segmented electrode assembly; 7. Lifting drive assembly; 8. Rotation drive assembly; 9. First transmissive light intensity pulsation sensor; 10. Second transmissive light intensity pulsation sensor; 701. Lead screw stepper motor; 702. Guide rail; 703. Slider; 704. Displacement sensor; 801. Rotary stepper motor; 802. Crank; 803. Connecting rod; 804. Angle sensor. Detailed Implementation

[0017] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0020] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Please see Figures 1-2 As shown, Figure 1 This is a schematic diagram of the overall structure of the coal-containing wastewater ion flocculation treatment device of the present invention. Figure 2 This is a diagram showing the module connection relationships in an embodiment of the present invention.

[0022] The coal-containing wastewater ion flocculation treatment device of this invention includes: The tank body is divided into the following sections along the water flow direction: water inlet distribution chamber 1, electrolytic flocculation zone 2, slow-flow growth zone 3, sedimentation and separation zone 4, and water outlet zone 5. The segmented sub-electrode assembly 6 is installed in the electrolytic flocculation zone 2 and consists of N columns of independently powered sub-electrode units. Each sub-electrode unit is isolated from each other by an insulating partition and is electrically led out independently. An electrode cleaning actuator includes a piezoelectric oscillator built into each sub-electrode and a polarity reversal circuit built into the power supply circuit of each sub-electrode. The electrode driving mechanism includes a lifting drive assembly 7 disposed on the side wall of the electrolytic flocculation zone 2 for driving the segmented sub-electrode assembly 6 to reciprocate along the side wall, and a rotation drive assembly 8 disposed on the lifting drive assembly for driving the segmented electrode assembly 6 to rotate. The signal acquisition component includes a Hall current sensor connected in series in the power supply circuit of each sub-electrode to acquire the current signal of each sub-electrode in real time, and a first transmissive light intensity pulsation sensor 9 and a second transmissive light intensity pulsation sensor 10 disposed in the slow-flow growth region 3 to acquire the dual-point light intensity signal of the slow-flow growth region. A feature extraction module, which is connected to the signal acquisition component, is used to determine the flocculation abnormality state of the electrolytic flocculation zone based on the analysis of the current signal and the dual-point light intensity signal. A flocculation control module, which is connected to the electrode driving mechanism and the feature extraction module respectively, is used to determine the target pose of the segmented sub-electrode assembly based on the flocculation abnormal state; An intervention control module, which is connected to the electrode cleaning execution component, the flocculation regulation module and the feature extraction module respectively, is used to select the corresponding electrode cleaning execution component based on the change of abnormal flocculation state in order to perform cleaning intervention; The dynamic optimization module is connected to the intervention control module, the electrode driving mechanism and the feature extraction module respectively, and is used to determine the pose optimization based on the electrode pose offset of the cleaning intervention.

[0023] Specifically, this invention analyzes the current signals of each sub-electrode and the dual-point light intensity signals of the slow-flow growth zone to determine the abnormal flocculation state existing in the electrolytic flocculation process of the electrolytic flocculation zone. It can predict abnormal flocculation in the electrolytic flocculation zone in advance, monitor dynamic indicators reflecting the growth of flocs, and then preliminarily determine the target pose of the segmented sub-electrode assembly under the abnormal flocculation state. It also analyzes the changes in the abnormal flocculation state of the corresponding target pose to determine the cleaning intervention of the execution electrode cleaning component, so as to perform mechanical or polarity reversal defoaming, descaling and passivation layer removal operations on the sub-electrodes. Based on the offset of the electrode pose caused by the cleaning intervention, it performs optimization action. Through angle optimization and depth optimization, it fine-tunes the electrode angle and electrode immersion depth, improves the efficiency of handling abnormal situations during flocculation, and thus improves the flocculation efficiency.

[0024] In this embodiment of the invention, the abnormal flocculation state includes electrode passivation state, local scaling state, and bubble disturbance state; The electrode passivation state is determined based on the continuous decrease of the flocculation rate within a preset statistical period and the negative long-term decay slope of more than half of the sub-electrodes. The local scaling condition is determined based on the flocculation rate being less than the average rate and the current of a single sub-electrode being lower than the average current of the segmented sub-electrode assembly. The bubble disturbance state is determined based on the fact that the standard deviation of the flocculation rate within a preset time window is greater than the rate mean and more than half of the sub-electrodes are in high-frequency fluctuation.

[0025] Specifically, by identifying abnormal flocculation states, this invention distinguishes between electrode passivation, localized scaling, and bubble disturbance, providing a classification basis for subsequent position adjustment and cleaning intervention, thereby improving the efficiency of handling abnormal flocculation states.

[0026] In this embodiment of the invention, the feature extraction module analyzes the current signals of each sub-electrode in the segmented sub-electrode assembly, extracts the high-frequency fluctuations, long-term attenuation slope, and current of a single sub-electrode, and determines the flocculation rate of flocs in the coal-containing wastewater in the slow-flow growth zone based on the dual-point light intensity signal, thereby determining at least one abnormal flocculation state in the electrolytic flocculation zone, namely, electrode passivation state, local scaling state, and bubble disturbance state.

[0027] In this embodiment of the invention, the flocculation rate is determined based on the particle size increase of the flocs in the slow-flow growth zone during the flow time. The flow time can be the ratio of the distance between two measuring points in the slow-flow growth zone to the flow velocity. The two measuring points are the locations of the first transmissive light intensity pulsation sensor 9 and the second transmissive light intensity pulsation sensor 10. The particle size increase is the difference in the amplitude of the light intensity signal between the two measuring points in the slow-flow growth zone.

[0028] Optionally, the number of sub-electrode columns N of the segmented sub-electrode assembly ranges from 4 to 10 columns, with 6 columns preferred in this embodiment. The sampling frequency of the Hall current sensor is 1 kHz, and the resolution is not less than 12 bits. The preset sampling frequency of the first transmissive light intensity pulsation sensor 9 and the second transmissive light intensity pulsation sensor 10 is 0.5-5 Hz, with 1 Hz preferred in this embodiment. The light source is a near-infrared LED with a wavelength of 800-950 nm, with 850 nm preferred in this embodiment. The photodetector is a silicon photodiode.

[0029] Please see Figures 3-4 As shown, Figure 3 This is a schematic diagram of the lifting drive assembly according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of the rotary drive assembly according to an embodiment of the present invention.

[0030] In this embodiment of the invention, the target pose includes: The first target pose includes determining the electrode driving mechanism to drive the segmented sub-electrode assembly to rotate clockwise and increase the electrode immersion depth based on the electrode passivation state, so as to use bubble flushing to assist in removing the passivation layer and increase the effective electrolysis area. The second target pose includes determining, based on the local scaling state, the electrode drive mechanism drives the segmented sub-electrode assembly to rotate counterclockwise in order to use the shear force of the water flow to remove the scaling. The third target pose includes determining, based on the bubble disturbance state, the electrode driving mechanism drives the segmented sub-electrode assembly to rotate clockwise and reduce the electrode immersion depth, so as to utilize water flow to help carry away the bubble and shorten the bubble's rising distance.

[0031] As an optional implementation method in this embodiment, the flocculation control module can determine the target pose based on the priority order of electrode passivation state, local scaling state, and bubble disturbance state when multiple flocculation abnormal states occur simultaneously.

[0032] In this embodiment of the invention, the lifting drive assembly includes a lead screw stepper motor 701, a guide rail 702, a slider 703, and a displacement sensor 704 for detecting the current immersion depth of the electrode plate. The lead screw stepper motor is fixed to the side wall of the electrolytic flocculation zone. The guide rail is arranged vertically. The slider is threadedly connected to the lead screw of the lead screw stepper motor. When the lead screw stepper motor drives the lead screw to rotate, the slider reciprocates along the guide rail. The rotation drive assembly includes a rotary stepper motor 801, a crank 802, a connecting rod 803, and an angle sensor 804 for detecting the current angle of the electrode plate. The rotary stepper motor is fixed to the slider. The crank is connected to the output shaft of the rotary stepper motor. The connecting rod is connected to the crank. The electrode plate of the segmented sub-electrode assembly is connected to the connecting rod. The rotary stepper motor drives the crank to rotate. The rotation of the crank is converted into the horizontal swing of the connecting rod, thereby driving the electrode plate to rotate.

[0033] Specifically, this invention adjusts the angle and depth of the electrode plates to regulate their position under different abnormal conditions, thereby achieving defoaming, descaling, or removal of the passivation layer. This improves the treatment effect for different abnormalities. The lifting drive assembly uses a lead screw stepper motor to drive the lead screw to rotate and drive the slider to reciprocate along the guide rail. The displacement sensor provides real-time feedback on the current immersion depth of the electrode plate, enabling precise and controllable adjustment of the electrode plate position, thus ensuring the stable execution of the position adjustment strategy and the long-term operational stability of the device.

[0034] In this embodiment of the invention, based on the electrode passivation state, the working surface of the electrode plate is inclined clockwise. Water flows upward along the inclined electrode plate surface, causing bubbles generated during the electrolysis process to slide upward along the electrode plate surface. During the upward sliding process, the bubbles continuously scour the passivation layer on the electrode plate surface, while increasing the electrode plate immersion depth and increasing the effective electrolysis area of ​​the electrode plate, allowing more metal ions to dissolve to compensate for the efficiency decrease caused by passivation. Thus, the scouring of bubbles assists in removing the passivation layer and increases the effective electrolysis area to compensate for the flocculation efficiency. Based on the local scaling state, the working surface of the electrode plate is inclined counterclockwise. Water flows directly impact the electrode plate surface and forms shear flow on the electrode plate surface. The shear force of the water flow acts on the local attachment area on the electrode plate surface, causing the attachments to peel off from the electrode plate surface under the action of shear force, thereby using the shear force of the water flow to remove the scale. Based on the bubble disturbance state, the working surface of the electrode plate is tilted in a clockwise direction. The water flow flows upward along the tilted electrode plate surface to help carry away the bubbles. At the same time, the immersion depth of the electrode plate is reduced, which shortens the floating distance of the bubbles from the electrode plate surface to the liquid surface, allowing the bubbles to escape from the liquid surface more quickly and reducing the accumulation of bubbles between the electrode plates. Thus, the water flow is used to help carry away the bubbles and shorten the floating distance of the bubbles.

[0035] Optionally, rotating clockwise indicates that the upper end of the electrode plate rotates from the water inlet distribution chamber 1 to the slow-flow growth zone 3. In the electrode plate driving mechanism, the initial value of the electrode plate angle is that the working surface of the electrode plate is perpendicular to the water flow direction, and the initial value of the electrode plate immersion depth is that the electrode plate is completely submerged in the wastewater. The electrode plate angle and the electrode plate immersion depth are adjusted within their respective preset adjustment ranges based on the pose adjustment strategy of the flocculation control module.

[0036] Please see Figure 5 As shown, it is a flowchart of the cleaning intervention selection process according to an embodiment of the present invention.

[0037] In this embodiment of the invention, the flocculation abnormality state change feature is used to determine the elimination of the flocculation abnormality state based on the change in the flocculation rate after pose adjustment relative to before pose adjustment, and includes: The first change characteristic is that the flocculation rate did not change after the pose adjustment, which indicates that the pose adjustment did not improve the abnormal flocculation state. The second change feature is that the change in the flocculation rate after the pose adjustment is greater than the amplitude threshold, which determines that the pose adjustment has an improving effect on the abnormal state. The third characteristic of change is that the flocculation rate changes and fluctuates after the pose adjustment, which indicates that the pose adjustment improves the flocculation efficiency but does not eliminate bubble disturbance.

[0038] In this embodiment of the invention, the intervention control module determines, through the first change feature, that the flocculation rate after posture adjustment is hindered by the residual adhesion layer on the electrode surface, and the presence of a chemical passivation layer on the electrode surface results in no improvement; through the second change feature, it determines that the flocculation rate after posture adjustment is partially restored by the local residual adhesion on the electrode surface, and the presence of residual adhesion on the electrode surface results in insufficient improvement; and through the third change feature, it determines that the flocculation rate after posture adjustment is affected by the lack of improvement in the bubble detachment path on the electrode surface, resulting in both restoration and fluctuation.

[0039] In this embodiment of the invention, the cleaning intervention includes: The polarity reversal intervention includes controlling the polarity reversal circuit via the intervention control module to reverse the current direction of the power supply circuit of each sub-electrode in response to the first change feature, controlling each sub-electrode to perform polarity reversal simultaneously, so as to peel off the passivation layer or stubborn adhesion layer that may exist on the surface of the electrode plate through the reduction reaction. Mechanical cleaning intervention includes controlling the piezoelectric vibrator to vibrate at high frequency via an intervention control module, determining the sub-electrode with the largest deviation characteristic value as the target sub-electrode based on the second change characteristic, sending a vibration trigger signal to the piezoelectric vibrator of the target sub-electrode, and using the inertia generated by the high-frequency vibration to peel off the attached material.

[0040] The current regulation intervention includes sending a current regulation signal to the electrolysis power source via the intervention control module, reducing the electrolysis current based on the third change characteristic to reduce the amount of bubbles generated by the electrolysis reaction, continuously monitoring the standard deviation change of the flocculation rate through the signal acquisition component during the current reduction period, and restoring the original electrolysis current based on the result that the standard deviation falls back to below the preset fluctuation threshold.

[0041] In this embodiment of the invention, the pose deviation includes, The electrode angle deviation is determined based on the comparison between the current electrode angle of the segmented sub-electrode assembly after cleaning intervention and the target electrode angle corresponding to the target pose.

[0042] The electrode immersion depth deviation is determined based on the comparison between the current electrode immersion depth of the segmented sub-electrode assembly after cleaning intervention and the target electrode immersion depth corresponding to the target pose.

[0043] In this embodiment of the invention, the displacement sensor 704 is disposed on the slider of the lifting drive assembly to collect the current immersion depth of the segmented sub-electrode assembly in real time, providing immersion depth information of the electrode plate to the flocculation control module, the intervention control module and the dynamic optimization module.

[0044] The angle sensor 804 is mounted on the output shaft of the rotation drive assembly to collect the current electrode angle of the segmented sub-electrode assembly in real time, providing electrode angle information to the flocculation control module, the intervention control module, and the dynamic optimization module.

[0045] In this embodiment of the invention, during the removal of deposits on the electrode surface by cleaning interventions such as polarity reversal or mechanical cleaning, the electrode angle or immersion depth of the segmented sub-electrode assembly may deviate from the target pose due to the influence of mechanical impact or electromagnetic force. The current electrode angle and current immersion depth are collected by the angle sensor and the displacement sensor and compared with the target pose to determine the amount of electrode pose shift caused by the cleaning intervention.

[0046] As an optional implementation method in this embodiment, the angle sensor may be a rotary encoder, and the displacement sensor may be a grating ruler or a Hall displacement sensor; the specific sensor model is not limited.

[0047] In this embodiment, the angle optimization is to make fine-tuning of the angle based on the current electrode angle in order to find the optimal angle under the current working conditions.

[0048] In this embodiment, the electrode angle is adjusted clockwise, and the flocculation rate is re-determined by the feature extraction module. Based on the result of the flocculation rate rebounding, the adjustment continues in the clockwise direction; based on the result of the flocculation rate decreasing, the adjustment is made in the opposite direction.

[0049] In this embodiment, depth optimization is performed by fine-tuning the current immersion depth of the electrode plate based on the current immersion depth, in order to find the optimal depth under the current working conditions.

[0050] In this embodiment, data is reacquired by the signal acquisition component, and adjustments are made in the direction of increasing the immersion depth of the electrode plate. The flocculation rate is then re-determined by the feature extraction module. Based on the result of the flocculation rate rebounding, adjustments are continued in the same direction; based on the result of the flocculation rate decreasing, adjustments are made in the opposite direction.

[0051] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for treating coal-containing wastewater by ion flocculation, characterized in that, include: The segmented sub-electrode assembly is installed in the electrolytic flocculation zone and consists of N rows of independently powered sub-electrode units. An electrode cleaning execution assembly includes a piezoelectric oscillator built into each sub-electrode and a polarity reversal circuit built into the power supply circuit of each sub-electrode, for cleaning the plates of the segmented sub-electrode assembly. The electrode drive mechanism includes a lifting drive assembly and a rotating drive assembly for driving the segmented sub-electrode assembly to move vertically and rotate about a horizontal axis. The signal acquisition component includes a Hall current sensor for real-time acquisition of current signals of each sub-electrode, and a first transmissive light intensity pulsation sensor and a second transmissive light intensity pulsation sensor arranged at intervals along the water flow direction for acquisition of dual-point light intensity signals. The feature extraction module is used to determine the flocculation anomaly state of the electrolytic flocculation zone based on the analysis of the current signal and the dual-point light intensity signal. A flocculation control module is used to determine the target pose of the segmented sub-electrode assembly based on the flocculation abnormality. The intervention control module is used to select the corresponding electrode cleaning execution component based on the characteristics of the abnormal flocculation state changes after the pose adjustment, so as to carry out cleaning intervention.

2. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The flocculation anomaly is determined based on the high-frequency fluctuations of the sub-electrode current signal, the long-term attenuation slope, the current signal of a single sub-electrode, and the flocculation rate.

3. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The abnormal flocculation states include: The electrode passivation state is determined based on the continuous decrease of the flocculation rate within a preset statistical period and the negative long-term decay slope of more than half of the sub-electrodes. The local scaling condition is determined based on the flocculation rate being less than the average rate and the current of a single sub-electrode being lower than the average current of the segmented sub-electrode assembly. The bubble disturbance state is determined based on the fact that the standard deviation of the flocculation rate within a preset time window is greater than the rate mean and more than half of the sub-electrodes are in high-frequency fluctuation.

4. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The target pose includes: The first target pose includes determining the electrode driving mechanism to drive the segmented sub-electrode assembly to rotate clockwise and increase the electrode immersion depth based on the electrode passivation state, so as to use bubble flushing to assist in removing the passivation layer and increase the effective electrolysis area. The second target pose includes determining, based on the local scaling state, the electrode drive mechanism drives the segmented sub-electrode assembly to rotate counterclockwise in order to use the shear force of the water flow to remove the scaling. The third target pose includes determining, based on the bubble disturbance state, the electrode driving mechanism drives the segmented sub-electrode assembly to rotate clockwise and reduce the electrode immersion depth, so as to utilize water flow to help carry away the bubble and shorten the bubble's rising distance.

5. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The flocculation abnormality state change characteristics are used to determine the elimination of the flocculation abnormality state based on the change in the flocculation rate after the pose adjustment relative to the pose adjustment before the pose adjustment.

6. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The cleaning intervention includes: The polarity reversal intervention includes controlling the polarity reversal circuit via the intervention control module to reverse the current direction of each sub-electrode power supply circuit in response to the first change characteristic, and controlling each sub-electrode to simultaneously perform polarity reversal in order to peel off any passivation layer or stubborn adhesion layer that may exist on the electrode surface through a reduction reaction.

7. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The cleaning intervention includes: Mechanical cleaning intervention includes controlling the piezoelectric vibrator to vibrate at high frequency via an intervention control module, determining the sub-electrode with the largest deviation characteristic value as the target sub-electrode based on the second change characteristic, sending a vibration trigger signal to the piezoelectric vibrator of the target sub-electrode, and using the inertia generated by the high-frequency vibration to peel off the attached material.

8. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, The cleaning intervention includes: The current regulation intervention includes sending a current regulation signal to the electrolysis power source via the intervention control module, reducing the electrolysis current based on the third change characteristic to reduce the amount of bubbles generated by the electrolysis reaction, continuously monitoring the standard deviation change of the flocculation rate through the signal acquisition component during the current reduction period, and restoring the original electrolysis current based on the result that the standard deviation falls back to below the preset fluctuation threshold.

9. The coal-containing wastewater ion flocculation treatment device according to claim 1, characterized in that, It also includes a dynamic optimization module, which is used to optimize the angle and depth after cleaning intervention. The angle optimization includes adjusting the electrode angle in one direction based on the current electrode angle. The depth optimization includes adjusting the electrode immersion depth in one direction based on the current electrode immersion depth.

10. The coal-containing wastewater ion flocculation treatment device according to claim 9, characterized in that, The electrode driving mechanism also includes an angle sensor for detecting the current electrode angle and a displacement sensor for detecting the current electrode immersion depth.

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