Electrode assembly and sewage electrolysis device

Abstract

The utility model provides an electrode assembly and a sewage electrolysis device. The electrode assembly comprises an electrode pair, the electrode pairs are arranged in groups in the transverse direction, and each group of electrode pairs are arranged in rows in the vertical direction; the cathode and anode arrangement directions of the upper and lower groups of electrode pairs are opposite to those of the upper group of electrode pairs in the transverse direction, the cathode and anode arrangement directions of the upper and lower rows of electrode pairs are opposite to those of the upper row of electrode pairs in the longitudinal direction, an included angle is formed between the cathode and anode arrangement directions, and the range of the included angle is 0-180 degrees. The sewage electrolysis device comprises an electrode assembly, the sewage electrolysis device comprises a water inlet tank, a circulating tank, an electrolytic tank and a water outlet tank which are sequentially connected, and the electrode assembly is arranged in the electrolytic tank. The problems of how to improve the electrolytic efficiency of the polar plate, reduce the investment cost of the polar plate and avoid excessive electrolysis can be solved.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to an electrode assembly and a sewage electrolysis device. Background Art

[0002] Electrolytic oxidation is an advanced oxidation technology for degrading organic matter and ammonia nitrogen in water. The use of different plate materials and different structural forms has always been a hot topic of research. Among them, boron-doped diamond coated plates can operate at a higher voltage when degrading organic matter in water without mainly producing oxygen evolution reactions due to their extremely high oxygen evolution potential and extremely low hydrogen evolution potential. Therefore, they have a higher organic matter degradation efficiency and a relatively wide range of organic matter degradation capabilities. In actual engineering applications, due to the high cost of boron-doped diamond coated plates, increasing the amount of water treated per unit area of ​​the plate as much as possible and reducing the investment cost of the plate have become one of the main considerations. Excessive electrolysis not only wastes energy to precipitate additional hydrogen and chlorine, but also causes the effluent to contain excessive oxidizing properties, which is manifested as high redox potential, high residual chlorine content, etc. Therefore, how to improve the electrolysis efficiency of the plate, reduce the investment cost of the plate and avoid excessive electrolysis is an urgent problem to be solved. Utility Model Content

[0003] The present application provides an electrode assembly and a sewage electrolysis device to solve the problem of how to improve the electrolysis efficiency of the electrode plate, reduce the investment cost of the electrode plate and avoid over-electrolysis.

[0004] In the first aspect of the present application, an electrode assembly is provided, comprising electrode pairs; the electrode pairs are arranged in groups in the horizontal direction, and each group of electrode pairs is arranged in rows in the vertical direction; in the horizontal direction, the cathode and anode arrangement directions of the next group of electrode pairs are opposite to those of the previous group of electrode pairs, and in the vertical direction, the cathode and anode arrangement directions of the next row and the previous row of electrode pairs are opposite and arranged at an angle, and the angle range is 0-180 degrees.

[0005] The electrode coating material is boron-doped diamond, and the coating thickness ranges from 2 to 10 microns; the electrode plate substrate is a silicon plate or a niobium plate, and the substrate thickness ranges from 0.5 to 2 millimeters.

[0006] The electrode plate spacing ranges from 0.1 mm to 5 mm.

[0007] The distance between the electrode plates is less than 2 mm, and an insulating support layer is filled between the plates; the support layer material is one of polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, and polysulfone modified material.

[0008] Each row uses a plurality of electrode pairs, each electrode being a double-sided coated electrode; or, each row uses a set of electrode pairs, each electrode being a single-sided coated electrode.

[0009] Each row uses multiple sets of electrode pairs, the anode is a double-sided coated electrode, and the cathode is a non-coated material electrode; or, each row uses one set of electrode pairs, the anode is a single-sided coated electrode, and the cathode is a non-coated material electrode.

[0010] A flow guide component is installed between the electrodes along the flow channel direction.

[0011] According to a second aspect of the present application, there is provided a sewage electrolysis device, comprising an electrode assembly as described above, wherein the sewage electrolysis device comprises an inlet tank, a circulation tank, an electrolysis tank, and an outlet tank connected in sequence, and the electrode assembly is arranged in the electrolysis tank.

[0012] The sewage electrolysis device also includes a monitoring device for monitoring the parameters of water samples in the circulation tank, the electrolysis tank, and the outlet tank.

[0013] The sewage electrolysis device also includes a regulating module for adjusting parameters of the water sample in the sewage electrolysis device.

[0014] The technical solution of this application achieves the following technical effects:

[0015] The utility model electrolysis device has high efficiency in degrading organic matter, produces less residual chlorine in side reactions, reasonably utilizes coating materials under different working conditions, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 A schematic flow chart of a sewage electrolysis device operation control method according to an embodiment of the present application is shown;

[0018] Figure 2 A schematic structural diagram of a sewage electrolysis device according to an embodiment of the present application is shown;

[0019] FIG3( a ) shows a top view of an electrode assembly according to Embodiment 1 of the present application;

[0020] FIG3( b ) shows a side view of an electrode assembly according to Embodiment 1 of the present application;

[0021] FIG4( a) shows a top view of an electrode assembly according to Embodiment 2 of the present application;

[0022] FIG4( b ) shows a side view of an electrode assembly according to the second embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] In a first aspect of the present application, an electrode assembly is provided. Figure 3(a) , 3(b) , 4(a), 4(b), comprising electrode pairs; the electrode pairs are arranged in groups in the horizontal direction, and each group of electrode pairs is arranged in rows in the vertical direction; in the horizontal direction, the cathode and anode arrangement directions of the next group of electrode pairs are opposite to those of the previous group of electrode pairs, and in the vertical direction, the cathode and anode arrangement directions of the next row and the previous row of electrode pairs are opposite and are arranged at an angle, and the angle range is 0-180 degrees.

[0025] The electrode coating material is boron-doped diamond, and the coating thickness ranges from 2 to 10 microns; the electrode plate substrate is a silicon plate or a niobium plate, and the substrate thickness ranges from 0.5 to 2 millimeters.

[0026] The electrode plate spacing ranges from 0.1 mm to 5 mm.

[0027] The distance between the electrode plates is less than 2 mm, and an insulating support layer is filled between the plates; the support layer material is one of polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, and polysulfone modified material.

[0028] Multiple electrode pairs are used in each row, and each electrode is coated on both sides; or, one electrode pair is used in each row, and each electrode is coated on one side. This method is used for reverse polarity operation.

[0029] Each row uses multiple sets of electrode pairs, the anode is a double-sided coated electrode, and the cathode is a non-coated material electrode; or, each row uses one set of electrode pairs, the anode is a single-sided coated electrode, and the cathode is a non-coated material electrode. This method is used for non-reversible operation conditions.

[0030] A flow guide component is installed between the electrodes along the flow channel direction.

[0031] In a second aspect of the present application, a sewage electrolysis device is provided. Figure 2 , including an electrode assembly as described above, the sewage electrolysis device includes an inlet tank, a circulation tank, an electrolytic tank, and an outlet tank connected in sequence, and the electrode assembly is arranged in the electrolytic tank.

[0032] The sewage electrolysis device also includes a monitoring device for monitoring the parameters of water samples in the circulation tank, the electrolysis tank, and the outlet tank.

[0033] The sewage electrolysis device also includes a regulating module for adjusting parameters of the water sample in the sewage electrolysis device.

[0034] The present application is based on the operation control method of the sewage electrolysis device, comprising the following steps:

[0035] S1: setting multiple groups of circulation flow parameters of sewage electrolysis devices, and obtaining one or more of the corresponding voltage, current, power consumption, influent flow, influent organic matter content, influent redox potential, effluent organic matter content, and effluent redox potential parameters;

[0036] In one embodiment of the present application, in the step S1, the circulation flow parameters of multiple groups of sewage electrolysis devices are set, including setting a basic circulation flow value, selecting multiple values ​​evenly distributed before and after the basic circulation flow value as circulation flow setting values, and the basic circulation flow value and the circulation flow setting value together constitute the circulation flow parameters of the multiple groups of sewage electrolysis devices.

[0037] In one embodiment of the present application, in step S1, one or more of the corresponding voltage, current, power consumption, inlet flow rate, inlet organic matter content, inlet redox potential, outlet organic matter content, and outlet redox potential parameters are obtained; including: the inlet organic matter content and outlet organic matter content are obtained by sampling and testing, the inlet flow rate is obtained by measuring with an online flowmeter, and the inlet redox potential and outlet redox potential are obtained by measuring with a redox potential analyzer; the voltage, current, and power consumption are obtained by measuring with an electric meter. Furthermore, an online monitoring instrument or a hyperspectral detection device or sampling and testing is used to monitor the organic matter content of the inlet and outlet water of the electrolysis device, and the organic matter index can be COD (oxygen demand) or TOC (total organic carbon). An online flowmeter or a water pump with a flowmeter is used to measure the inlet and circulating water volume, and a redox potential analyzer is used to measure the redox potential of the inlet and outlet water.

[0038] S2: inputting the parameters in step S1 into a preset neural network model to predict the electronic efficiency of electrolytic removal of organic matter, outputting the electronic efficiency prediction value; and obtaining the maximum value of the electronic efficiency prediction value;

[0039] In one implementation of the present application, in step S2, the preset neural network model is an error back propagation neural network model.

[0040] In one embodiment of the present application, the error back propagation neural network model includes two hidden layers and a P-ReLU activation function, wherein the number of nodes and partitions of the hidden layer and the learning rate are determined according to input parameters, output parameters and training conditions.

[0041] In one embodiment of the present application, the learning rates of the two hidden layers are adaptively adjusted using the Adam algorithm.

[0042] S3: Calculate the actual value of the electronic efficiency of electrolytic removal of organic matter under the circulation flow condition with the maximum value of the electronic efficiency prediction value, and the error between the electronic efficiency prediction value and the actual value of the electronic efficiency under this condition;

[0043] In one embodiment of the present application, at least the current, inlet flow rate, inlet organic matter content, and outlet organic matter content parameters are obtained; in step S3, the inlet organic matter content is the inlet chemical oxygen demand, and the outlet organic matter content is the outlet chemical oxygen demand;

[0044] The calculation formula for the actual value of electronic efficiency η is:

[0045]

[0046] Among them, N A is Avogadro's constant, e is the amount of electricity carried by the elementary charge, I is the current, F is the influent flow rate, COD in Influent organic matter content, COD out Chemical oxygen demand of effluent.

[0047] S4: When the error meets the preset condition, the iteration is stopped, and the circulation flow value under the condition of the maximum value in the electronic efficiency prediction value is used as the optimal circulation flow parameter; otherwise, the maximum value is discarded, and the maximum value in the remaining electronic efficiency prediction values ​​is selected, and the process returns to step S3 for iteration;

[0048] In one embodiment of the present application, the iteration is stopped when the error satisfies a preset condition, wherein the preset condition may be a set threshold condition. When the error is less than a preset threshold, for example, the preset threshold is 1%, when the error is less than 1%, the error between the actual value and the predicted value representing the electronic efficiency reaches the allowable range error, at which point the iteration is stopped to obtain the maximum value of the electronic efficiency within the allowable error range.

[0049] Therefore, the accuracy of the predicted value of the electronic efficiency parameter for electrolytic removal of organic matter is corrected by comparing the actual value of the electronic efficiency with the predicted value.

[0050] S5: The circulation flow parameter of the sewage electrolysis device is adjusted to the optimal circulation flow parameter to perform electrolysis operation on the sewage.

[0051] In this step, the sewage electrolysis device is adjusted and the sewage is electrolyzed based on the circulation flow parameter corresponding to the maximum value of the electronic efficiency within the allowable error range, and other operating parameters under the circulation flow parameter conditions, including one or more of voltage, current, power consumption, inlet flow, inlet organic matter content, inlet redox potential, effluent organic matter content, and effluent redox potential parameters.

[0052] In one embodiment of the present application, the sewage electrolysis device operation control method includes:

[0053] Step 110: Obtain the voltage, current, power consumption, inlet flow rate, inlet COD, inlet redox potential, circulation flow parameters, effluent COD, and effluent redox potential of the sewage electrolysis treatment.

[0054] The sewage in this step is preferably non-degradable organic wastewater, and the parameters can be obtained through sampling, online monitoring equipment and other methods.

[0055] Step 120: Given a plurality of sets of circulation flow setting values, the corresponding parameters are input into the error back propagation neural network model, the electronic efficiency of electrolytic removal of organic matter is predicted according to different circulation flow setting values, and the circulation flow is adjusted and controlled according to the circulation flow setting value with the highest predicted electronic efficiency of electrolytic removal of organic matter.

[0056] Step 130: Calculate the actual value of the electronic efficiency parameter for electrolytic removal of organic matter using the current, influent flow, influent COD, and effluent COD at the current circulation flow, correct the accuracy of the predicted value of the electronic efficiency parameter for electrolytic removal of organic matter, and perform model self-optimization.

[0057] It should be pointed out that the input parameters can be partial or complete.

[0058] Through the method disclosed in the present application, it is possible to realize automated and refined control of electrolysis cycle flow parameters, thereby improving electrolysis efficiency.

[0059] In one embodiment, according to the current circulation flow value, 20 circulation flow setting values ​​with a deviation of 1% to 10% are given, and a total of 21 values ​​are added to the current circulation flow value, and the electronic efficiency prediction value of electrolytic removal of organic matter corresponding to each value is output respectively, and the circulation flow setting value with the highest electronic efficiency prediction value of electrolytic removal of organic matter is compared with the corresponding actual value of electronic efficiency from large to small and the error is calculated, and the circulation flow corresponding to the maximum electronic efficiency within the error range is used as the circulation flow control value feedback control. It should be pointed out that the selection of the deviation amplitude and the number of circulation flow setting values ​​involved in the calculation and comparison can be adjusted.

[0060] In a preferred embodiment, the input items of the error back propagation neural network prediction model are voltage, current, power consumption, influent flow, influent COD, influent redox potential, and circulation flow, and the output item is the predicted value of the electronic efficiency of electrolytic removal of organic matter. The first layer of the hidden layer has 9 nodes, the second layer has 9 nodes, and the learning rates of the two layers are adaptively adjusted using the Adam algorithm. The model is run in a way that historical data is used for offline training and the model is updated regularly.

[0061] After this method has been used for a period of time, the electronic efficiency of electrolytic removal of organic matter can be stably controlled at more than 40%, and averages more than 45%.

[0062] Furthermore, the present application also shows a structural form of an electrode assembly of a sewage electrolysis device, comprising: electrode pairs, the electrode pairs are arranged in groups in the horizontal direction, and multiple groups of electrode pairs are arranged in rows in the vertical direction;

[0063] The influent flows through the electrode pairs in sequence, the cathode and anode of the next set of electrode pairs are arranged in the opposite direction to the previous set of electrode pairs, the polarity of the electrodes in the next row is opposite to that in the previous row, and the electrodes in the next row are at an angle of 0-180 degrees to the previous row. Furthermore, the voltage value / current value / current density of the electrolytic oxidation device can be set according to the measured influent flow rate, chemical organic matter content value, redox potential value, target value of chemical organic matter content after electrolytic oxidation, and effective plate area of ​​the electrolytic device.

[0064] Optionally, the electrode plate coating material is preferably boron-doped diamond, the coating thickness is preferably 2-10 microns, the electrode plate substrate is preferably silicon plate or niobium plate, and the substrate thickness is preferably 0.5-2 mm.

[0065] Optionally, the distance between the pole plates is 0.1mm-5mm. When the distance between the pole plates is less than 2mm, an insulating support layer can be filled between the pole plates. The support layer is in the form of parallel lines, meshes, or parallel plates, preferably meshes. The support layer material is polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, polysulfone modified material, etc., preferably polysulfone material.

[0066] Optionally, when multiple sets of electrode pairs are used in each row and the pole is reversed, each electrode can be a double-sided coated electrode; when multiple sets of electrode pairs are used in each row and the pole is not reversed, the anode is a double-sided coated electrode, and the cathode can use an electrode of non-coated material; when only one set of electrode pairs is used in each row and the pole is reversed, each electrode can be single-sided coated; when only one set of electrode pairs is used in each row and the pole is not reversed, the anode can use a single-sided coated electrode, and the cathode can use an electrode of non-coated material. Due to the high cost of coating the plate, the present application only coats when necessary to maximize the amount of water treated by the plate per unit area and reduce the plate investment cost.

[0067] Reversing the polarity of the electrodes means changing the polarity of the electrodes, and reversing the positive and negative polarities. During the electrolysis process, long-term use will form contaminants on the electrode surface, affecting the electrolysis efficiency and reducing the life of the electrode. Therefore, the polarity of the two electrodes can be interchanged to prevent or reduce the formation of contaminants on the electrode surface, which is beneficial to maintaining the electrolysis efficiency and life of the electrodes.

[0068] Optionally, a flow guide component may be installed between the electrodes along the flow channel direction.

[0069] The high concentration of salt in sewage is conducive to improving the mass transfer and reaction efficiency of electrolytic degradation of organic matter. However, during the electrolysis process, the degradation of organic matter and the production of chlorine, residual chlorine and other side reactions are in competition with each other. The acidic conditions formed locally at the anode are conducive to chlorine generation. The chlorine potential is greatly reduced under acidic conditions, and chlorine production and residual chlorine may become the main reaction. Through the design of the present application, the acidic conditions formed locally at the anode are quickly pushed to the cathode of the next pair of plates, and because the angle between the two groups of plates destroys the stable laminar flow state, the mass transfer efficiency is significantly improved, and the formation and accumulation of the local acidic environment are suppressed, so that the production of chlorine and the residual chlorine reaction in the electrolysis reaction are suppressed, and the competitiveness of the electrolytic degradation of organic matter reaction is improved, thereby improving the power consumption of electrolytic degradation of organic matter, while reducing the residual chlorine content of the effluent, and reducing the subsequent consumption of the agent for removing the residual chlorine.

[0070] The present application scheme is further described below in conjunction with embodiments.

[0071] Example 1

[0072] Please refer to FIG. 3 (a) and FIG. 3 (b), which show an electrode assembly structure of an electrolysis device, which includes three rows of electrodes, each row having a group of electrode pairs;

[0073] In this embodiment, coking wastewater is used as the sewage treatment object. The influent flows through paired electrodes in sequence. The cathode and anode of the next row of electrode pairs are arranged in the opposite direction to the cathode and anode of the previous row of electrode pairs, and are at an angle of 10 degrees to the cathode and anode of the previous row of electrode pairs. Each row has a group of electrode pairs, including a pair of electrodes. The voltage and current density of the electrolytic oxidation device are controlled according to the measured influent flow rate, chemical oxygen demand value, redox potential value, target chemical oxygen demand value after electrolytic oxidation, and effective plate area of ​​the electrolytic device; the voltage value is controlled at 4.5V-5.5V, and the current density is controlled at 30-120mA / cm 2 .

[0074] The electrode plate anode 506 is a silicon-based single-sided coating of boron-doped diamond with a coating thickness of 2 microns, a silicon substrate thickness of 2 millimeters, a cathode plate of stainless steel, a plate spacing of 3 mm, and cannot be reversed.

[0075] Sampling and testing are performed to monitor the inlet chemical oxygen demand and outlet chemical oxygen demand of the electrolysis device, an online flow meter is used to measure the inlet flow rate and circulation flow rate, and an oxidation-reduction potential analyzer is used to measure the inlet oxidation-reduction potential and outlet oxidation-reduction potential.

[0076] According to the current circulation flow value, 20 circulation flow setting values ​​with a deviation of 1% to 10% are given, plus the current circulation flow value, a total of 21 numbers, and the corresponding electronic efficiency prediction value of electrolytic removal of organic matter is output for each value respectively. According to the circulation flow setting value with the highest electronic efficiency prediction value of electrolytic removal of organic matter, the values ​​are compared with the corresponding actual values ​​of the electronic efficiency in descending order and the errors are calculated. The circulation flow corresponding to the maximum electronic efficiency within the error range is used as the circulation flow control value feedback control.

[0077] The error back propagation neural network prediction model includes at least two hidden layers and a P-ReLU activation function, and uses the kaiming parameter initialization method. The model input items are voltage, current, power consumption, influent flow, influent chemical oxygen demand, influent redox potential, and circulation flow. The output item is the predicted value of the electronic efficiency of electrolytic removal of organic matter. The first layer of the hidden layer has 7 nodes and the second layer has 4 nodes. The learning rate of both layers is set to α, and the default value is 0.1. The model can be run in a way that the historical data is used for offline training and the model is updated regularly.

[0078] The error back propagation neural network prediction model is optimized using the above parameter values, and the actual current I, influent flow F, influent chemical oxygen demand COD in , Chemical oxygen demand (COD) of effluent out The actual value of the parameter of the electron efficiency η of the electrolytic removal of organic matter is calculated, and the accuracy of the predicted value of the parameter of the electron efficiency η of the electrolytic removal of organic matter is corrected.

[0079] The calculation formula for the actual value of the electronic efficiency parameter for electrolytic removal of organic matter is:

[0080]

[0081] Among them, N A is Avogadro's constant, and e is the charge carried by the elementary charge.

[0082] The following table records the electronic efficiency values ​​of electrolytic removal of organic matter under different influent types and parameter conditions in this embodiment. It can be concluded that after 2 months of application of this method, the electronic efficiency of electrolytic removal of organic matter from coking wastewater can be stably controlled at more than 40%, and the power consumption for removing 1kgCOD is 30-40kwh / kgCOD.

[0083]

[0084] Example 2

[0085] Please refer to FIG. 4 (a) and FIG. 4 (b), which show another electrode assembly structure of the electrolysis device, which includes three rows, each row including two groups of electrode pairs (from top to bottom, the first row and the second row are one group, and the third row and the fourth row are another group), each group of electrode pairs includes one or more pairs of electrodes, and in this embodiment, five pairs of electrodes are set; further, the five electrodes in each row may include a single electrode (anode 506 plate or cathode 507 plate) at the end, and two sensing plates, one end of the sensing plate is an anode 506 and the other end is a cathode 507. In specific implementation, the remaining electrodes can be arranged according to the polarity of the first single electrode, for example, the first electrode of the first row of the first group is a single anode, the second and third electrodes are set as sensing electrodes and are cathodes and anodes, respectively, the fourth and fifth electrodes are set as sensing electrodes and are cathodes and anodes, respectively, the first row of the first group and the second row are set in pairs with the first row, the first and second electrodes are set as sensing electrodes and are cathodes and anodes, respectively, the third and fourth electrodes are set as sensing electrodes and are cathodes and anodes, respectively, and the fifth is a single electrode and a cathode. The remaining rows are arranged according to the aforementioned arrangement principles, as shown in Figure 3, and will not be described again here.

[0086] This embodiment uses sintering acid wastewater as the treatment object. The influent flows through paired induction electrodes in sequence. The arrangement direction of the cathode and anode of the next group of electrode pairs is opposite to that of the previous group of electrode pairs. The arrangement direction of the cathode and anode of the next row of electrode pairs is also opposite to that of the previous row of electrode pairs. The next row is at an angle of 6 degrees to the previous row of electrodes. Each group has five pairs of electrodes. The voltage and current density of the electrolytic oxidation device are controlled according to the measured influent flow rate, chemical oxygen demand value, redox potential value, target chemical oxygen demand value after electrolytic oxidation, and effective plate area of ​​the electrolytic equipment; the voltage value is controlled at 4.2V-5.2V, and the current density is controlled at 30-100mA / cm 2 .

[0087] The anode and cathode of the electrode plate are both niobium-based and double-sidedly coated with boron-doped diamond. The coating thickness is 8 microns, the thickness of the niobium substrate is 1 mm, the distance between the plates is 2 mm, and the operation can be reversed.

[0088] The inlet chemical oxygen demand and outlet chemical oxygen demand of the electrolysis device are monitored online, the inlet flow rate and circulation flow rate are measured by an online flow meter, and the inlet redox potential and outlet redox potential are measured using an oxidation-reduction potential analyzer.

[0089] According to the current circulation flow value, 20 circulation flow setting values ​​with a deviation of 1% to 10% are given, plus the current circulation flow value, a total of 21 numbers, and the corresponding electronic efficiency prediction value of electrolytic removal of organic matter is output for each value respectively. According to the circulation flow setting value with the highest electronic efficiency prediction value of electrolytic removal of organic matter, the values ​​are compared with the corresponding actual values ​​of the electronic efficiency in descending order and the errors are calculated. The circulation flow corresponding to the maximum electronic efficiency within the error range is used as the circulation flow control value feedback control.

[0090] The error back propagation neural network prediction model includes at least two hidden layers and a P-ReLU activation function, and uses the kaiming parameter initialization method. The model input items are voltage, current, power consumption, influent flow, influent chemical oxygen demand, influent redox potential, and circulation flow. The output item is the predicted value of the electronic efficiency of electrolytic removal of organic matter. The first layer of the hidden layer has 9 nodes, and the second layer has 9 nodes. The learning rates of the two layers are adaptively adjusted using the Adam algorithm. It is run in a way that historical data is used for offline training and the model is updated regularly.

[0091] Of course, this application only shows a way to use the error back propagation neural network prediction model, which is only a data analysis tool for completing the control method of this application. You can also use existing data analysis software, such as SPSSPRO, to directly set input and output parameters, the number of nodes in each layer, the learning rate and other parameters.

[0092] The error back propagation neural network prediction model is optimized using the parameter values, and the actual current I, the influent flow F, the influent chemical oxygen demand COD in , Chemical oxygen demand (COD) of effluent out The actual value of the parameter of the electron efficiency η of the electrolytic removal of organic matter is calculated, and the accuracy of the predicted value of the parameter of the electron efficiency η of the electrolytic removal of organic matter is corrected.

[0093] After three months of application of this method, the electronic efficiency of electrolytic removal of organic matter from sintering acid wastewater can be stably controlled at above 42%.

[0094] Of course, the above-mentioned structure is only a preferred embodiment of the present application. The electrode pairs can be arranged in only one row or in multiple rows up and down; they can be arranged in one group or multiple groups horizontally; each group of electrode pairs can contain one or more pairs of electrodes.

[0095] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For the part that is not described in detail in a certain embodiment, refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the description are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0096] In addition, the method according to the present application may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0097] Alternatively, the present application can also be implemented as a non-temporary machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) on which executable code (or computer program, or computer instruction code) is stored. When the executable code (or computer program, or computer instruction code) is executed by a processor of an electronic device (or electronic device, server, etc.), the processor executes part or all of the steps of the above-mentioned method according to the present application.

[0098] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the application herein may be implemented as electronic hardware, computer software, or combinations of both.

[0099] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system and method according to multiple embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a part of a module, a program segment or a code, and the part of the module, the program segment or the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or the flow chart, and the combination of the square boxes in the block diagram and / or the flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0100] It should be understood that in order to streamline the application and help understand one or more of the various application aspects, in the above description of the exemplary embodiments of the application, the various features of the application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the application claimed for protection requires more features than the features clearly stated in each claim. More specifically, as reflected in the claims below, the application aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the application.

[0101] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0102] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

Claims

1. An electrode assembly, characterized in that: It includes electrode pairs; the electrode pairs are arranged in groups in the horizontal direction, and each group of electrode pairs is arranged in rows in the vertical direction; in the horizontal direction, the anode and cathode arrangement directions of the next group of electrode pairs are opposite to those of the previous group of electrode pairs, and in the vertical direction, the anode and cathode arrangement directions of the next row and the previous row of electrode pairs are opposite and are arranged at an angle, and the angle range is 0-180 degrees.

2. An electrode assembly according to claim 1, characterized in that: The electrode coating material is boron-doped diamond, and the coating thickness ranges from 2 to 10 microns; the electrode plate substrate is a silicon plate or a niobium plate, and the substrate thickness ranges from 0.5 to 2 millimeters.

3. An electrode assembly according to claim 1, characterized in that: The electrode plate spacing ranges from 0.1 mm to 5 mm.

4. An electrode assembly according to claim 3, characterized in that: The distance between the electrode plates is less than 2 mm, and an insulating support layer is filled between the plates; the support layer material is one of polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, and polysulfone modified material.

5. An electrode assembly according to claim 1, characterized in that: Each row uses a plurality of electrode pairs, each electrode being a double-sided coated electrode; or, each row uses a set of electrode pairs, each electrode being a single-sided coated electrode.

6. An electrode assembly according to claim 1, characterized in that: Each row uses multiple sets of electrode pairs, the anode is a double-sided coated electrode, and the cathode is a non-coated material electrode; or, each row uses one set of electrode pairs, the anode is a single-sided coated electrode, and the cathode is a non-coated material electrode.

7. An electrode assembly according to claim 1, characterized in that: A flow guide component is installed between the electrodes along the flow channel direction.

8. A sewage electrolysis device, comprising an electrode assembly according to any one of claims 1 to 7, characterized in that: The sewage electrolysis device comprises an inlet pool, a circulation pool, an electrolytic pool, and an outlet pool which are connected in sequence, and the electrode assembly is arranged in the electrolytic pool.

9. A sewage electrolysis device as claimed in claim 8, characterized in that: It also includes a monitoring device for monitoring the parameters of water samples in the circulation pool, electrolytic cell and water outlet pool.

10. A sewage electrolysis device as claimed in claim 8, characterized in that: It also includes a regulating module for adjusting the parameters of the water sample in the sewage electrolysis device.

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