Integrated electrochemical water treatment method and integrated electrochemical treatment device

Abstract

The invention discloses an integrated electrochemical water treatment method and an integrated electrochemical treatment device.The method comprises the steps that the integrated electrochemical treatment device is started, and the working state of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device is monitored; cleaning the integrated electrochemical treatment device at a preset time interval; when the working state of a certain integrated water treatment electrolysis unit does not meet the preset condition, the integrated water treatment electrolysis unit is shut down for overhauling or cleaning, and the working parameters of other integrated water treatment electrolysis units are kept or adjusted. The integrated electrochemical treatment device comprises a plurality of integrated water treatment electrolysis units which are connected in series or / and in parallel. The system shows excellent multi-scene adaptability, can realize rapid maintenance on the premise of not interfering the operation of the whole system, and has high flexible adjustment capability for different process requirements and actual operation scenes.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment, and specifically relates to an integrated electrochemical water treatment method and an integrated electrochemical treatment device. Background Art

[0002] As an effective means for degrading organic matter, electrochemical treatment can directly break the chemical bonds of organic matter and convert it into harmless or low-toxic small-molecule substances. It has the advantages of complete mineralization of pollutants and no secondary pollution, and is of great significance for promoting sustainable development and green production. Compared with other traditional electrodes, the boron-doped diamond thin film electrode (BDD electrode), with its excellent oxidation potential and high treatment performance, can achieve the comprehensive oxidation of all organic matter and becomes the preferred solution for electrode materials. The core of electrochemical treatment technology lies in the plate material and structure design, and the electrolysis efficiency is also affected by factors such as current density, electrode spacing, and plate area. In actual engineering projects, it is necessary to flexibly adjust the number of electrode modules and the plate area in the device according to different actual application scenarios and treatment efficiency targets to adapt to different voltage and current requirements, meet various flow conditions and the degradation requirements of organic matter with different concentrations, which is of key significance for energy conservation and efficiency improvement.

[0003] The existing electrochemical water treatment methods still have problems of low integration and insufficient flexibility during the treatment process. Summary of the Invention

[0004] The present application provides an integrated electrochemical water treatment method and an integrated electrochemical treatment device, aiming to solve the problems of low integration and insufficient flexibility of the electrochemical water treatment method and device, so as to adapt to different treatment efficiency requirements.

[0005] In the first aspect of the present application, an integrated electrochemical water treatment method is provided, which is applied to an integrated electrochemical treatment device. The method includes:

[0006] Start the integrated electrochemical treatment device and monitor the working status of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device;

[0007] Clean the integrated electrochemical treatment device at preset time intervals;

[0008] When the working status of a certain integrated water treatment electrolysis unit does not meet the preset conditions, stop the operation and repair or clean the integrated water treatment electrolysis unit, and maintain or adjust the working parameters of other integrated water treatment electrolysis units.

[0009] As an optional embodiment, monitoring the working status of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device includes monitoring at least one of the current, voltage, and organic matter concentration in each integrated water treatment electrolysis unit.

[0010] As an alternative embodiment, the method includes:

[0011] S101: Set the working current and working voltage parameters of each integrated water treatment electrolysis unit;

[0012] S102: Collect the current and voltage parameters of the integrated water treatment electrolysis unit;

[0013] S103: Control the integrated water treatment electrolysis unit to operate at a constant current, and determine whether the first deviation between the operating current and the working current is within the current deviation range;

[0014] S104: When the first deviation is within the current deviation range, activate the control system, calculate the voltage adjustment parameter, assign the adjustment degree of the power supply voltage, and determine whether the adjustment degree is within the voltage deviation range;

[0015] S105: When the adjustment degree is within the allowable voltage deviation range, feedback and adjust the power supply voltage of the integrated water treatment electrolysis unit with this adjustment degree, so that the voltage parameter of the integrated water treatment electrolysis unit reaches the set working voltage value, and return to step S102 for cyclic monitoring and adjustment.

[0016] As an alternative embodiment, in step S104, when the first deviation is outside the current deviation range, manually assign a voltage value and determine the manual adjustment degree, and determine whether the voltage adjustment degree is within the voltage deviation range.

[0017] As an alternative embodiment, in step S105, when the adjustment degree is outside the allowable voltage deviation range and after running for an accumulated duration, shut down and repair or clean this integrated water treatment electrolysis unit; maintain or adjust the working parameters of other integrated water treatment electrolysis units, so that other integrated water treatment electrolysis units operate at the set working current and voltage, and return to step S102 for cycling.

[0018] As an alternative embodiment, clean the integrated electrochemical treatment device at preset time intervals, including increasing the flow rate or speed of each integrated water treatment electrolysis unit at preset time intervals, or performing reverse start flushing on the integrated electrochemical treatment device.

[0019] As an alternative embodiment, when the working state of a certain integrated water treatment electrolysis unit does not meet the preset conditions, shut down and repair this integrated water treatment electrolysis unit, and maintain or adjust the working parameters of other integrated water treatment electrolysis units, including when the working states of one or more integrated water treatment electrolysis units do not meet the preset conditions, shut down and repair the integrated water treatment electrolysis units that do not meet the preset conditions, and maintain or adjust the working parameters of other integrated water treatment electrolysis units according to the voltage, current, and water flow required for the organic matter degradation operation at the set concentration.

[0020] In the second aspect of the present application, an integrated electrochemical treatment device is provided, which includes a plurality of integrated water treatment electrolysis units, and the plurality of integrated water treatment electrolysis units are arranged in series and / or in parallel.

[0021] As an alternative embodiment, the plurality of integrated water treatment electrolysis units are all connected in parallel both in the water circuit and in the electric circuit.

[0022] As an alternative embodiment, the plurality of integrated water treatment electrolysis units are all connected in series both in the water circuit and in the electric circuit.

[0023] As an alternative embodiment, the plurality of integrated water treatment electrolysis units are grouped to be connected in parallel in the water circuit, and are connected in series between the groups, and the plurality of integrated water treatment electrolysis units are connected in parallel in the electric circuit.

[0024] As an alternative embodiment, the integrated water treatment electrolysis unit includes n electrode unit modules, where n is a positive integer. When n ≥ 2, the electrode unit modules form n electrolysis zones in the second direction.

[0025] As an alternative embodiment, the electrode unit module includes m layers of staggered cathode plates and anode plates arranged along the first direction, and the electrode unit module is divided into m - 1 electrolysis chambers.

[0026] Advantages of the present application:

[0027] Compared with the existing electrochemical water treatment technology, the present application has the remarkable advantages of high treatment efficiency, high fault tolerance rate, being able to achieve rapid maintenance without disturbing the operation of the overall system, and being flexibly adjustable in the face of different process requirements and actual operation conditions. Description of the Drawings

[0028] In order to more clearly illustrate the embodiments and devices of the present application, the present application will be described in detail below with reference to the drawings, but it is not used as a basis for limiting the present application.

[0029] Figure 1 It is a flowchart of an integrated electrochemical water treatment method of the present application;

[0030] Figure 2 It is a flowchart of a specific embodiment of an integrated electrochemical water treatment method of the present application;

[0031] Figure 3 It is a schematic diagram of the parallel connection of the integrated water treatment electrolysis units in an integrated electrochemical treatment device of the present application;

[0032] Figure 4 It is a schematic diagram of the series connection of the integrated water treatment electrolysis units in an integrated electrochemical treatment device of the present application;

[0033] Figure 5aSchematic side view of the water connection relationship of the integrated water treatment electrolysis unit in series - parallel form 1 in an integrated electrochemical treatment device of the present application;

[0034] Figure 5b Schematic front view of the water connection relationship of the integrated water treatment electrolysis unit in series - parallel form 1 in an integrated electrochemical treatment device of the present application;

[0035] Figure 5c Schematic side view of the circuit connection relationship of the integrated water treatment electrolysis unit in series - parallel form 1 in an integrated electrochemical treatment device of the present application;

[0036] Figure 5d Schematic front view of the circuit connection relationship of the integrated water treatment electrolysis unit in series - parallel form 1 in an integrated electrochemical treatment device of the present application;

[0037] Figure 6a Schematic side view of the water connection relationship of the integrated water treatment electrolysis unit in series - parallel form 2 in an integrated electrochemical treatment device of the present application;

[0038] Figure 6b Schematic front view of the water connection relationship of the integrated water treatment electrolysis unit in series - parallel form 2 in an integrated electrochemical treatment device of the present application;

[0039] Figure 6c Schematic side view of the circuit connection relationship of the integrated water treatment electrolysis unit in series - parallel form 2 in an integrated electrochemical treatment device of the present application;

[0040] Figure 6d Schematic front view of the circuit connection relationship of the integrated water treatment electrolysis unit in series - parallel form 2 in an integrated electrochemical treatment device of the present application;

[0041] Figure 7a Schematic top - down sectional view of an integrated electrochemical treatment device of the present application;

[0042] Figure 7b Schematic front - to - back sectional view of an integrated electrochemical treatment device of the present application;

[0043] Figure 8a Schematic diagram of the structure when the number of electrode unit modules in the integrated water treatment electrolysis unit of the present application is three;

[0044] Figure 8b Schematic diagram of the structure when the number of electrode unit modules in the integrated water treatment electrolysis unit of the present application is five;

[0045] Figure 8c Schematic diagram of the structure when the number of electrode unit modules in the integrated water treatment electrolysis unit of the present application is seven;

[0046] Figure 9aIt is a simulation diagram of the integrated water treatment electrolysis unit structure of this application;

[0047] Figure 9b It is an analysis diagram of the main flow state of the integrated water treatment electrolysis unit structure of this application;

[0048] Figure 9c It is an analysis diagram of the flow state of the integrated water treatment electrolysis unit's downward structure of this application.

[0049] In the figure: 1 - Cover plate; 2 - Positive terminal; 3 - Negative terminal; 4 - Main body water treatment device body; 5 - Conductive bolt; 6 - Cathode plate; 7 - Anode plate; 8 - Electrode gasket; 9 - Trapezoidal extension; 10 - Water outlet; 11 - Water inlet; 12 - Deflector; 13 - Bolt. Specific implementation mode

[0050] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0051] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms "a", "an", and "the" used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0052] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0053] In the related technology, during the water treatment operation process, the flexibility is not high, and it is difficult to perform local maintenance without shutdown. For this reason, this application provides an integrated electrochemical water treatment method, which is applied to an integrated electrochemical treatment device. The method includes,

[0054] See Figure 1, start the integrated electrochemical treatment device and monitor the working status of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device;

[0055] Clean the integrated electrochemical treatment device at preset time intervals;

[0056] When the working status of a certain integrated water treatment electrolysis unit does not meet the preset conditions, stop the operation and repair or clean the integrated water treatment electrolysis unit, and maintain or adjust the working parameters of other integrated water treatment electrolysis units.

[0057] In an embodiment provided by the present application, monitoring the working status of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device includes monitoring at least one of the current, voltage, and organic matter concentration in each integrated water treatment electrolysis unit.

[0058] It can be understood that when at least one of the current, voltage, and organic matter concentration in a single integrated water treatment electrolysis unit is abnormal, it indicates that its working status is abnormal and it needs to be stopped for repair.

[0059] In an embodiment provided by the present application, see Figure 2 , the method includes,

[0060] S101: Set the working current and working voltage parameters of each integrated water treatment electrolysis unit;

[0061] S102: Collect the current and voltage parameters of the integrated water treatment electrolysis unit;

[0062] S103: Control the integrated water treatment electrolysis unit to operate at a constant current and determine whether the first deviation between the operating current and the working current is within the current deviation range;

[0063] S104: When the first deviation is within the current deviation range, activate the control system, calculate the voltage adjustment parameter, assign a value to the adjustment degree of the power supply voltage, and determine whether the adjustment degree is within the voltage deviation range;

[0064] S105: When the adjustment degree is within the allowable voltage deviation range, feedback and adjust the power supply voltage of the integrated water treatment electrolysis unit with this adjustment degree so that the voltage parameter of the integrated water treatment electrolysis unit reaches the set working voltage value, and return to step S102 for cyclic monitoring and adjustment.

[0065] Specifically, the control system is a PID control system based on the PID (Proportional Integral Derivative) algorithm, and its basic principle is a mature existing technology, so it will not be elaborated here.

[0066] In an implementation provided by the present application, in step S104, when the first deviation is outside the current deviation range, a voltage assignment is manually given, and the manual adjustment degree is determined, and it is judged whether the voltage adjustment degree is within the voltage deviation range.

[0067] In an implementation provided by the present application, in step S105, when the adjustment degree is outside the allowable voltage deviation range and after running for an accumulated duration, the integrated water treatment electrolysis unit is shut down for maintenance or cleaning; the working parameters of other integrated water treatment electrolysis units are maintained or adjusted so that other integrated water treatment electrolysis units operate at the set working current and voltage, and return to step S102 for cycling. Among them, the accumulated duration is a preset time length.

[0068] It can be understood that through the traversal method, the above monitoring and control processing are performed on each integrated water treatment electrolysis unit.

[0069] In an implementation provided by the present application, the integrated electrochemical treatment device is cleaned at preset intervals, including increasing the flow rate or speed of each integrated water treatment electrolysis unit at preset intervals, or performing a reverse start-up flushing on the integrated electrochemical treatment device.

[0070] Since bubbles are generated during the electrolysis process and will adhere to the electrode surface, weakening the electrolysis efficiency, it is necessary to clean regularly. By increasing the flow rate or speed of each integrated water treatment electrolysis unit, the increased impact force can be used to remove the bubbles on the electrode plate, or reverse flushing can be performed to counter-convect with the original bubbles to remove the bubbles.

[0071] In an implementation provided by the present application, when the working state of a certain integrated water treatment electrolysis unit does not meet the preset conditions, the integrated water treatment electrolysis unit is shut down for maintenance, and the working parameters of other integrated water treatment electrolysis units are maintained or adjusted, including when the working states of one or more integrated water treatment electrolysis units do not meet the preset conditions, the integrated water treatment electrolysis units that do not meet the preset conditions are shut down for maintenance, and the working parameters of other integrated water treatment electrolysis units are maintained or adjusted according to the voltage, current, and water flow required for the degradation operation of the organic matter at the set concentration.

[0072] For example, for a specific type and concentration of organic matter, assuming that the required degradation voltage is fixed, when a certain integrated water treatment electrolysis unit in a parallel circuit is shut down for maintenance, the voltage of other integrated water treatment electrolysis units remains unchanged, and the original working parameters can be maintained. When a certain integrated water treatment electrolysis unit in a series circuit after parallel grouping is shut down for maintenance, the voltage will change, so voltage regulation is required to meet the working requirements of other integrated water treatment electrolysis units.

[0073] The present application provides an integrated electrochemical treatment device, which includes a plurality of integrated water treatment electrolysis units, and the plurality of integrated water treatment electrolysis units are arranged in series and / or in parallel.

[0074] As Figures 3 to 6d shown, according to different actual application scenarios or specific requirements of treatment efficiency, the method of the present application selects the number of integrated water treatment electrolysis units according to process parameters, and realizes series and / or parallel configuration through pipeline connection, so as to be integrated into an efficient and collaborative integrated device as the integrated electrochemical treatment device.

[0075] The connection mode of the integrated water treatment electrolysis units in the integrated electrochemical treatment device can be the following three types:

[0076] In the first connection mode provided by the present application, a plurality of integrated water treatment electrolysis units are connected in parallel both in the water circuit and in the circuit.

[0077] In this embodiment, let C be the number of integrated water treatment electrolysis units connected in parallel, n be the number of electrode unit modules in a single integrated water treatment electrolysis unit, the total load voltage of a single integrated water treatment electrolysis unit be n V, and the current be A. Then the total voltage of the integrated device (integrated electrochemical treatment device) formed by connecting these C integrated water treatment electrolysis units in parallel is nV, and the current is CA. As Figure 3 shown. A parallel form of a multi-component integrated electrochemical treatment device based on BDD electrode unit modules is listed. Among them, the number of integrated water treatment electrolysis units is three, and the number of electrode unit modules in each integrated water treatment electrolysis unit is seven, that is, C = 3, n = 7. The three integrated water treatment electrolysis units are connected in parallel both in the water circuit and in the circuit. The positive and negative terminals of the three integrated water treatment electrolysis units are respectively connected to the power supply and are used as backups for each other. The total current of the integrated electrochemical treatment device is 3A, and the voltage is 7V, which can efficiently and collaboratively treat sewage and improve the fault tolerance of the electrolysis system.

[0078] In the second connection mode provided by the present application, a plurality of integrated water treatment electrolysis units are connected in series both in the water circuit and in the circuit.

[0079] In this embodiment, let D be the number of integrated water treatment electrolysis units connected in series, n be the number of electrode unit modules in a single integrated water treatment electrolysis unit, the total load voltage of a single integrated water treatment electrolysis unit be n V, and the current be A. Then the total voltage of the integrated device (integrated electrochemical treatment device) formed by connecting these C integrated water treatment electrolysis units in parallel is (D*n)V, and the current is A. As Figure 4As shown in the figure, a series form of a multi-component integrated electrochemical treatment device based on a BDD electrode unit module is listed. Among them, the number of integrated water treatment electrolysis units is three, and the number of electrode unit modules in each integrated water treatment electrolysis unit is three, that is, D = 3, n = 3. The three integrated water treatment electrolysis units are connected in series both in the water circuit and the electrical circuit. The three multi-component integrated electrochemical treatment devices (n = 3, D = 3) in the electrical circuit and the water circuit are connected in series, and the positive and negative terminals are alternately connected, which can improve the electrolysis efficiency. In this embodiment, the voltage carried by each electrode unit module is 20V and the current is 1000A. Therefore, the maximum current of the busbar of this series integrated device is 1000A, and the maximum voltage is 180V (3×3×20V).

[0080] In the third connection method provided in this application, multiple integrated water treatment electrolysis units are grouped in parallel in the water circuit and connected in series between groups, and multiple integrated water treatment electrolysis units are connected in parallel in the electrical circuit; or, multiple integrated water treatment electrolysis units are grouped in parallel in the electrical circuit and connected in series between groups.

[0081] In the first form of the third connection method, multiple integrated water treatment electrolysis units are grouped in parallel in the water circuit and connected in series between groups, and multiple integrated water treatment electrolysis units are connected in parallel in the electrical circuit. Let C be the number of parallel groups of integrated water treatment electrolysis units, D be the number of longitudinal series groups, and n be the number of electrode unit modules in a single integrated water treatment electrolysis unit. The total voltage carried by a single integrated water treatment electrolysis unit is nV and the current is A. Then the total voltage of this C*D integrated water treatment electrolysis unit series-parallel integrated device (integrated electrochemical treatment device) is nV, and the total current is (C*D)A.

[0082] When working normally, let the total system flow rate be Q, then the flow rate of each integrated water treatment electrolysis unit is Q / C.

[0083] Through the above settings, the integrated water treatment electrolysis unit can be powered off and repaired separately at any time, and the overall system operation is not disturbed by flexibly adjusting the current parameters.

[0084] When components in X integrated water treatment electrolysis units fail, the flow rate of the remaining integrated water treatment electrolysis units in parallel with them is Q / (C - X), and the flow rate of the remaining integrated water treatment electrolysis units connected in series above and below them is not affected, which is Q / C; the X integrated water treatment electrolysis units are cut off water and power for separate repair. At this time, the remaining D*(C - X) integrated water treatment electrolysis units in parallel with them still work, the total voltage is nV, and the total current is (D*(C - X))A.

[0085] As Figures 5a to 5dAs shown, a series-parallel combination form of a multi-component integrated electrochemical treatment device based on a BDD electrode unit module is listed. That is, there are 6 integrated water treatment electrolysis units, and the number of electrode unit modules in a single integrated water treatment electrolysis unit is 7. See Figure 5a and Figure 5b . In terms of the water path, the water paths of 3 integrated water treatment electrolysis units on the same layer are in parallel, and the water paths between 2 groups of integrated water treatment electrolysis units on the upper and lower layers are in series. In the orientation shown in the figure, the water paths of the three integrated water treatment electrolysis units below are in parallel, and the water paths of the three integrated water treatment electrolysis units above are in parallel. C = 3, D = 2, n = 7, and the upper and lower hydraulic forces are in series. When the system is working normally and the total flow rate is Q, then when the system is working normally, the flow rate of each integrated water treatment electrolysis unit is Q / 3. For example, when the integrated water treatment electrolysis unit in the lower left corner fails, water and power are cut off from this integrated water treatment electrolysis unit. At this time, the flow rate of the remaining 2 integrated water treatment electrolysis units in the lower part is Q / 2, and the flow rate of each integrated water treatment electrolysis unit in the upper part is Q / 3.

[0086] In this embodiment, see Figure 5c and Figure 5d . The 7 electrode unit modules in a single integrated water treatment electrolysis unit are in series, and the 6 integrated water treatment electrolysis units are in parallel combination, forming a series-parallel relationship of 42 electrode unit modules. Assume that the voltage carried by each electrode unit module is 20V and the current is 1000A. Then the voltage of the seven electrode unit modules in a single integrated water treatment electrolysis unit is 140V (7×20V), and the current is 1000A. In the six integrated water treatment electrolysis units with seven electrode unit modules in this embodiment, the six integrated water treatment electrolysis units are in parallel, the total voltage of the integrated electrochemical treatment device is 140V, and the total current is 6000A.

[0087] In case of a failure, such as when the integrated water treatment electrolysis unit in the lower left corner fails, water and power are cut off from this integrated water treatment electrolysis unit. At this time, the voltage of the remaining 5 integrated water treatment electrolysis unit branches in the lower part is 140V, and the current is 1000A. After removing the faulty component, the total voltage of this integrated equipment is 140V, and the total current is 5000A.

[0088] In the second form of the third connection method, multiple integrated water treatment electrolysis units are grouped in parallel on the water path and in series between groups, and multiple integrated water treatment electrolysis units are grouped in parallel on the circuit and in series between groups.

[0089] Let C be the number of parallel groups of integrated water treatment electrolysis units, D be the number of longitudinal series groups, and n be the number of electrode unit modules in a single integrated water treatment electrolysis unit. As Figures 6a to 6dAs shown, a series-parallel combination form of a multi-component integrated electrochemical treatment device based on a BDD electrode unit module is listed. In terms of the water circuit and the electric circuit, two integrated water treatment electrolysis units form an overall parallel module, and two parallel modules are then connected in series, that is, C = 2, D = 2, and n = 3.

[0090] In the water circuit, the water circuits of the two integrated water treatment electrolysis units in the overall parallel module are in parallel and then in series. When working normally, the total system flow rate is Q. Then, when working normally, the flow rate of each integrated water treatment electrolysis unit is Q / 2. In case one of the integrated water treatment electrolysis units fails, water and power supply to this integrated water treatment electrolysis unit are cut off, and the flow rate of the integrated water treatment electrolysis unit in parallel with it will increase to Q, while the flow rates of the two integrated water treatment electrolysis units in the other overall parallel module connected in series with this overall parallel module remain unchanged, maintaining Q / 2.

[0091] In the electric circuit, the voltage borne by the three-electrode unit module of a single integrated water treatment electrolysis unit is 3V and the current is A. When two integrated water treatment electrolysis units are connected in parallel, the voltage is 3V and the current is 2A; for the overall module connected in parallel and then in series, the voltage is 6V and the current is 2A.

[0092] In Figures 6a to 6d In the specific embodiment shown, assume that the voltage borne by each electrode unit module is 20V and the current is 1000A. Then, the voltage of the three-electrode unit module of a single integrated water treatment electrolysis unit is 60V (3×20V), and the current is 1000A.

[0093] In the water circuit, referring to Figure 6a and 6b , the water circuits of the two layers of integrated water treatment electrolysis units in the overall parallel module are in parallel, and the upper and lower overall parallel modules are in series. When working normally, the total system flow rate is Q. Then, when working normally, the flow rate of each integrated water treatment electrolysis unit is Q / 2.

[0094] In the electric circuit, referring to Figure 6c and 6d , the 3 electrode unit modules in a single integrated water treatment electrolysis unit are in series, the upper and lower 2 sets of integrated water treatment electrolysis units are in series combination, and the left and right two integrated water treatment electrolysis units are in parallel combination, forming a series-parallel relationship of 12 electrode unit modules. The voltage of the three-electrode unit module of a single integrated water treatment electrolysis unit is 60V (3×20V), and the current is 1000A. After two are connected in parallel, the voltage is 60V and the current is 2000A. After two groups are connected in series, the total working voltage of this 2*2 integrated device is 120V and the total current is 2000A.

[0095] The integrated water treatment electrolysis unit arranged in parallel on the circuit can be powered off and repaired separately at any time, and does not interfere with the operation of the overall system by flexibly adjusting the overall current parameters. On the water path, when one of the integrated water treatment electrolysis units fails, the integrated water treatment electrolysis unit is cut off from water and power. For the units in parallel with it, the flow rate of the integrated water treatment electrolysis unit increases to Q, and the flow rates of the two integrated water treatment electrolysis units of another overall parallel module connected in series with this overall parallel module remain unchanged, maintaining Q / 2.

[0096] In an embodiment provided by the present application, for the integrated water treatment electrolysis unit, see Figure 7a , which includes n electrode unit modules, where n is a positive integer. When n≥2, the electrode unit modules form n electrolysis zones in the second direction.

[0097] In an embodiment provided by the present application, for the electrode unit module, see Figure 7b , which includes m layers of staggered cathode plates and anode plates arranged along the first direction, dividing the electrode unit module into m - 1 electrolysis chambers.

[0098] The number of layers m of the cathode plate 6 and the anode plate 7 can be flexibly set according to different treatment efficiencies. The m - layer plates divide the main flow path into (m - 1) flow paths to treat sewage in parallel.

[0099] The n electrode unit modules and the m - layer plates finally make the integrated water treatment electrolysis unit form (m - 1) parallel electrolysis chambers and n series electrolysis chambers, which are backup systems for each other. The existence of multiple electrolysis chambers improves the fault tolerance rate and treatment efficiency of the device.

[0100] Furthermore, for the integrated electrochemical treatment device provided by the present application, see Figure 7a 、 Figure 7b , which includes an integrated water treatment electrolysis unit, a water distribution system, and a power supply system.

[0101] The integrated water treatment electrolysis unit includes electrode unit modules, and the electrode unit modules include at least a pair of cathode plates 6 and anode plates 7 in the first direction.

[0102] The water distribution system includes the main body water treatment body 4.

[0103] The electrode unit modules are arranged in the main body water treatment body 4, and the positive and negative poles of the power supply are respectively connected to the anode plate 7 and the cathode plate 6 from both ends of the main body water treatment body 4 to form a power supply circuit.

[0104] In an embodiment provided by the present application, the water distribution system further includes a water inlet 11, a water outlet 10, a cover plate 1, a positive terminal 2, and a negative terminal 3. The main body water treatment device 4 has a pressure-bearing housing, and cover plates 1 are provided at both ends. The water inlet 11 and the water outlet 10 are provided on the pressure-bearing housing. The positive terminal 2 and the negative terminal 3 are respectively provided on the cover plates 1 at both ends. The positive pole of the power supply system is connected to the anode plate 7 through the positive terminal 2, and the negative pole is connected to the cathode plate 6 through the negative terminal 3.

[0105] Furthermore, the cover plates 1 are all connected and locked through mounting flanges and bolts, which is convenient for the disassembly and maintenance of the water treatment electrode unit module. The positive and negative terminals are firmly connected to the cover plate 1 with fastening hexagonal nuts. To ensure sealing and isolation, a flat washer, an isolation sleeve, a sealing ring, and an insulating gasket are successively arranged between the fixing nut and the cover plate 1 to achieve effective isolation and sealing functions.

[0106] The socket of the pressure-bearing housing and the electrode unit module is circular on the outside and square on the inside, that is, a plurality of plate members are arranged around the inner wall of the circular pressure-bearing housing, and the ends of each plate member enclose a square socket to better fix the water treatment electrode assembly.

[0107] Optionally, the pressure-bearing housing is made of two materials. One is a stainless steel shell, and the other is a cylindrical shell of fiber-wound fiberglass with a lining of polyvinyl chloride (PVC) material, which has the remarkable advantages of high strength, corrosion resistance, and electrical insulation.

[0108] In an embodiment provided by the present application, the water inlet 11 and the water outlet 10 are respectively arranged at the side bottom and side top of both ends of the main body water treatment device 4, or at the bottom and top of the cover plates 1 at both ends.

[0109] Adopting the structure of water inlet from the bottom and outlet from the top can take away the bubbles generated during the electrolysis process and prevent the bubbles from attaching to the electrode surface and weakening the electrolysis efficiency.

[0110] In an embodiment provided by the present application, the main body water treatment device 4 is placed horizontally or vertically.

[0111] In an embodiment provided by the present application, in the first direction, a plurality of cathode plates 6 and anode plates 7 are provided. The cathode plates 6 and the anode plates 7 are arranged at intervals layer by layer, and adjacent cathode plates 6 and anode plates 7 are connected through conductive bolts 5.

[0112] The number of layers m of the cathode plates 6 and the anode plates 7 can be flexibly set according to different treatment efficiencies. The m-layer plates divide the main flow channel into (m - 1) flow channels to treat sewage in parallel.

[0113] In an embodiment provided by the present application, the integrated water treatment electrolysis unit includes a plurality of electrode unit modules. In the second direction, each cathode plate 6 is respectively connected through a conductive bolt 5, and each anode plate 7 is respectively connected through a conductive bolt 5.

[0114] Please refer to Figure 7a , in the orientation shown in this figure, the first direction refers to the vertical direction, and the second direction refers to the horizontal direction. It can be understood that in different illustrated orientations, the first direction and the second direction change with the illustrated orientation.

[0115] In an embodiment provided by the present application, in the first direction, an electrode gasket 8 is provided between adjacent cathode plates 6 and anode plates 7. Trapezoidal extensions 9 are respectively arranged at both ends of the cathode plate 6 and the anode plate 7 in a staggered manner. The trapezoidal extensions 9 and the electrode gasket 8 are provided with round holes, and the electrode gasket 8 is arranged between two adjacent trapezoidal extensions 9; the conductive bolt 5 passes through the round holes of the trapezoidal extensions 9 of the same-pole plates and the electrode gasket 8 to connect the plates. The first electrode unit module, the second electrode unit module,..., the nth electrode unit module are connected in series through the trapezoidal extensions 9 and the electrode gasket 8 for power connection. The electrode gasket 8 is made of titanium (TA1\TA2\TA10) - coated copper material.

[0116] It can be understood that according to different actual application scenarios and specific requirements of treatment efficiency, the number of electrode unit modules in the integrated water treatment electrolysis unit can be flexibly selected to adapt to different voltage and current requirements, so as to effectively meet various flow conditions and the degradation requirements of organic matter with different concentrations.

[0117] If the voltage carried by each electrode unit module is set as V and the current is set as A. Then for an integrated water treatment electrolysis unit, when the number of electrode unit modules is two, since the electrode unit modules are connected in series, its overall carried voltage is 2V and the current is A; when the number of electrode unit modules is three, its overall carried voltage is 3V and the current is A; when the number of electrode unit modules is n, its overall carried voltage is nV and the current is A.

[0118] Such as Figure 8a , Figure 8b , Figure 8c shown, three combination forms of the number of electrode unit modules are listed, and each has an integrated water treatment electrolysis unit. Set the voltage carried by each electrode unit module as 20V and the current as 1000A, then: as Figure 8a shown, when the number of electrode unit modules is three, its overall carried voltage is 60V (i.e., 20V × 3) and the current is 1000A; as Figure 8b shown, when the number of electrode unit modules is five, its overall carried voltage is 100V (i.e., 20V × 5) and the current is 1000A; as Figure 8cAs shown, when the number of electrode unit modules is seven, the overall bearing voltage is 140V (i.e., 20V×7), and the current is 1000A.

[0119] The integrated water treatment electrolysis unit includes a first electrode unit module, a second electrode unit module, …, an nth electrode unit module (n is the number of electrode unit modules). The integrated water treatment electrolysis unit can be divided into a first electrolysis zone, a second electrolysis zone, a third electrolysis zone, …, an nth electrolysis zone according to the number of its electrode unit modules, and the electrolysis zone voltage gradually decreases along the water flow direction.

[0120] As Figure 9a 、 Figure 9b 、 Figure 9c shown, the Ansys Discovery simulation tool was used to perform a flow state simulation on a multi-component integrated electrochemical treatment device based on a BDD electrode unit in a three-module form. With a pressure difference of 0.2 Mpa as the boundary condition, the water flow can maintain a stable and uniform flow state, smoothly pass through the electrode plate area, and ensure the efficient operation of the electrolysis process.

[0121] In an embodiment provided by the present application, the water distribution system further includes a baffle plate 12, and the baffle plate 12 is disposed on both sides of the cathode plate 6 and the anode plate 7.

[0122] In an embodiment provided by the present application, a plurality of integrated water treatment electrolysis units are arranged in series and / or in parallel.

[0123] In an embodiment provided by the present application, the electrode sizes of the cathode plate 6 and the anode plate 7 are 300mm×82mm, and they are made of silicon-based or niobium-based materials, and the substrate thickness ranges from 0.5 to 2 mm; the anode plate 7 is a double-sided coated electrode, and the cathode plate is a non-coated material electrode. The electrode coating material is boron-doped diamond, and the coating thickness is 2 to 10 microns.

[0124] Optionally, a multi-component integrated electrochemical treatment device based on a BDD electrode unit module configured in series or in parallel through pipeline connection can be equipped with intelligent systems such as a current stabilizing and automatic control system, a current regulator, an ammeter, a voltmeter, a flow meter, an abnormal voltage protection device, an alarm, or an overall control panel.

[0125] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. An integrated electrochemical water treatment method, characterized in that, Applied to an integrated electrochemical treatment device, the method includes Starting the integrated electrochemical treatment device and monitoring the working state of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device; Cleaning the integrated electrochemical treatment device at preset time intervals; When the working state of a certain integrated water treatment electrolysis unit does not meet the preset conditions, shutting down the integrated water treatment electrolysis unit for maintenance or cleaning, and maintaining or adjusting the working parameters of other integrated water treatment electrolysis units.

2. The integrated electrochemical water treatment method according to claim 1, characterized in that, The monitoring of the working state of each integrated water treatment electrolysis unit in the integrated electrochemical treatment device Includes monitoring at least one of the current, voltage, and organic matter concentration in each integrated water treatment electrolysis unit.

3. The integrated electrochemical water treatment method according to claim 2, characterized in that, The method includes S101: Setting the working current and working voltage parameters of each integrated water treatment electrolysis unit; S102: Collecting the current and voltage parameters of the integrated water treatment electrolysis unit; S103: Controlling the integrated water treatment electrolysis unit to operate at a constant current and judging whether the first deviation between the operating current and the working current is within the current deviation range; S104: When the first deviation is within the current deviation range, activating the control system, calculating the voltage adjustment parameter, assigning a value to the adjustment degree of the power supply voltage, and judging whether the adjustment degree is within the voltage deviation range; S105: When the adjustment degree is within the allowable voltage deviation range, feedback-adjusting the power supply voltage of the integrated water treatment electrolysis unit with this adjustment degree so that the voltage parameter of the integrated water treatment electrolysis unit reaches the set working voltage value, and returning to step S102 for cyclic monitoring and adjustment.

4. The integrated electrochemical water treatment method according to claim 3, characterized in that, In step S104, when the first deviation is outside the current deviation range, manually assign a voltage value and determine the manual adjustment degree, and judge whether the voltage adjustment degree is within the voltage deviation range.

5. An integrated electrochemical water treatment method according to claim 3, characterized in that In step S105, when the adjustment degree is outside the allowable voltage deviation range and after running for a cumulative duration, shutting down the integrated water treatment electrolysis unit for maintenance or cleaning; maintaining or adjusting the working parameters of other integrated water treatment electrolysis units so that other integrated water treatment electrolysis units operate at the set working current and voltage, and returning to step S102 for cycling.

6. The integrated electrochemical water treatment method according to claim 1, characterized in that, The cleaning of the integrated electrochemical treatment device at preset time intervals includes increasing the flow rate or speed of each integrated water treatment electrolysis unit at preset time intervals, or performing reverse start-up flushing on the integrated electrochemical treatment device.

7. An integrated electrochemistry water treatment method as described in claim 1, wherein, When the working state of a certain integrated water treatment electrolysis unit does not meet the preset conditions, shutting down the integrated water treatment electrolysis unit for maintenance and maintaining or adjusting the working parameters of other integrated water treatment electrolysis units, including when the working states of one or more integrated water treatment electrolysis units do not meet the preset conditions, shutting down the integrated water treatment electrolysis units that do not meet the preset conditions for maintenance, and maintaining or adjusting the working parameters of other integrated water treatment electrolysis units according to the voltage, current, and water flow required for the degradation operation of the organic matter at the set concentration.

8. An integrated electrochemical treatment device, characterized in that, The integrated electrochemical treatment device includes a plurality of integrated water treatment electrolysis units, and the plurality of integrated water treatment electrolysis units are arranged in series and / or in parallel.

9. The integrated electrochemical treatment device according to claim 8, characterized in that, The plurality of integrated water treatment electrolysis units are connected in parallel both in the water circuit and in the electrical circuit; Or, the plurality of integrated water treatment electrolysis units are connected in series both in the water circuit and in the electrical circuit; Or, the plurality of integrated water treatment electrolysis units are grouped and connected in parallel in the water circuit, and are connected in series between groups, and the plurality of integrated water treatment electrolysis units are connected in parallel in the electrical circuit.

10. An integrated electrochemical treatment device according to claim 8, characterized in that, The integrated water treatment electrolysis unit includes n electrode unit modules, where n is a positive integer. When n≥2, n electrolysis zones are formed by the electrode unit modules in the second direction; the electrode unit module includes m layers of staggered cathode plates and anode plates arranged along the first direction, and the electrode unit module is divided into m - 1 electrolysis chambers.

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