Electrode module and polarity reversal descaling system

Abstract

The utility model relates to an electrode module and polarity reversal descaling system, it includes: working anode, two groups of first cathode, two groups first cathode set up respectively in both sides of working anode, each group first cathode includes first vertical cathode strip and forms in first vertical cathode strip side and with anode plate body parallel multiple first horizontal cathode strip, multiple first horizontal cathode strip interval arrangement, two groups of second cathode, two groups second cathode set up respectively in both sides of working anode and with two groups first cathode one to one correspondence in the same plane, each group second cathode includes with first vertical cathode strip parallel second vertical cathode strip and forms in second vertical cathode strip side and with anode plate body parallel multiple second horizontal cathode strip. Thus greatly reduce the thickness of electrode module, be applicable to the thickness limited electrolysis scene.

Description

Technical Field

[0001] This utility model belongs to the field of electrochemical device technology, and relates to an electrode module and a polarity reversal descaling system. Background Technology

[0002] In conventional water electrolysis, a reduction reaction occurs near the cathode (e.g., 2H₂O + 2e⁻). - →H2↑+2OH-), producing a large number of OH- ions, causing a sharp increase in the local pH value (strong alkalinity). Ca2+ in the water + Mg2 + In this environment, plasma will form insoluble precipitates (such as CaCO3 and Mg(OH)2), which adhere to the cathode surface to form scale. The scale adheres preferentially to the cathode surface in the form of microcrystals, avoiding deposition in the pipe. The scale adhering to the cathode has a great impact on the efficiency of electrolysis and the life of the electrode. Commonly used methods for removing scale include: (1) Chemical cleaning method (acid washing): using acidic solutions (such as dilute citric acid, dilute acetic acid, dilute hydrochloric acid, etc.) to dissolve alkaline scale (calcium carbonate, magnesium hydroxide, etc.); (2) Electronic method: through the reversal of electrode polarity (anode becomes cathode, cathode becomes anode).

[0003] Chinese invention patent application number 202110561502.1 discloses a method for simultaneously maintaining the cathode while preparing ozone through water electrolysis. The method includes: connecting parallel-connected working anodes to the positive terminal of a power supply and connecting parallel-connected working cathodes to the negative terminal of the power supply to prepare ozone; when deposits accumulate on the surface of the working cathode, maintaining and restoring the activity of the working cathode by reversing polarity through a restoration cathode method, including the following steps: connecting the negative terminal of the restoration power supply to the restoration cathode, connecting the positive terminal of the restoration power supply to the working cathode, disconnecting the current at the working anode, and removing the deposits on the working cathode, thus cleaning the working cathode while preparing ozone. In this application, the working anodes and working cathodes are arranged with a fixed gap, which can be 1mm to 2mm. However, when there are multiple sets of working anodes and working cathodes, their thickness becomes too large, making them unsuitable for applications with thickness limitations. Utility Model Content

[0004] The purpose of this invention is to provide an electrode module to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an electrode module, comprising:

[0006] The working anode includes an anode plate, a wiring protrusion formed on the anode plate, and a plurality of through holes formed on the anode plate;

[0007] Two sets of first cathodes are respectively disposed on both sides of the working anode; each set of first cathodes includes a first vertical cathode bar and multiple first horizontal cathode bars formed on the side of the first vertical cathode bar and parallel to the anode plate, the multiple first horizontal cathode bars being spaced apart;

[0008] Two sets of second cathodes are respectively disposed on both sides of the working anode and are in the same plane corresponding to the two sets of first cathodes. Each set of second cathodes includes a second vertical cathode bar parallel to the first vertical cathode bar and multiple second horizontal cathode bars formed on the side of the second vertical cathode bar and parallel to the anode plate. The multiple second horizontal cathode bars are spaced apart and alternately disposed with the corresponding first horizontal cathode bars.

[0009] Ideally, the two sets of first cathodes are symmetrical about the working anode, and the two sets of second cathodes are symmetrical about the working anode.

[0010] Furthermore, the number of the first horizontal cathode bars is greater than the number of the second horizontal cathode bars.

[0011] Furthermore, each of the second horizontal cathode bars is located between two adjacent first horizontal cathode bars.

[0012] Furthermore, the first cathode and the second cathode, which are in the same plane, are defined as the first cathode group, and the distance between the first cathode group and the working anode is 0.5 to 2 mm.

[0013] Furthermore, the first and second transverse cathode bars are independently 0.5 to 1.5 mm in length.

[0014] Furthermore, the spacing between adjacent first and second transverse cathode bars is 0.3–0.8 mm.

[0015] Furthermore, the distance between the center of the first horizontal cathode bar and the adjacent second horizontal cathode bar is less than or equal to the distance between the first cathode group and the working anode.

[0016] Another object of the present invention is to provide the above-described polarity reversal descaling system, which includes the electrode module described in any one of claims 1 to 8.

[0017] Optimally, it includes:

[0018] A DC power supply having a positive terminal and a negative terminal;

[0019] Terminal A is connected to the positive terminal.

[0020] Terminal B, wherein terminal B is selectively connected to either the positive terminal or the negative terminal;

[0021] Terminal C is selectively connected to either the positive terminal or the negative terminal; terminal C and terminal B are not simultaneously connected to the positive terminal.

[0022] The working anode is connected to the terminal A;

[0023] The two sets of first cathodes are connected to the terminal B in parallel;

[0024] The two sets of second cathodes are connected to the terminal C in parallel.

[0025] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The electrode module of this utility model, by setting two sets of first cathodes and two sets of second cathodes on both sides of the working anode, makes the corresponding first cathodes and second cathodes in the same plane, thereby greatly reducing the thickness of the electrode module, and is suitable for electrolysis scenarios with limited thickness. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the electrode module of this utility model;

[0027] Figure 2 This is the wiring diagram (operating mode) of the electrode module of this utility model;

[0028] Figure 3 This is the wiring diagram of the electrode module of this utility model (first descaling mode);

[0029] Figure 4 This is the wiring diagram of the electrode module of this utility model (second descaling mode);

[0030] Figure 5 This is a schematic diagram of the wiring method for the electrode module of this utility model. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0032] Example 1

[0033] like Figure 1 The electrode module shown mainly includes a working anode 1', a first cathode 2', and a second cathode 3'.

[0034] The working anode 1' includes an anode plate 11', a wiring protrusion 13' formed on the anode plate 11' (usually formed in one piece, the same below), and multiple through holes 12' opened on the anode plate 11' (the number and size of the through holes 12' can be conventionally selected according to actual needs, and are usually arranged in a neat array).

[0035] There are two sets of first cathodes 2', which are respectively arranged on both sides of the working anode 1', preferably such that the two sets of first cathodes 2' are symmetrical about the working anode 1'. Each set of first cathodes 2' includes a first vertical cathode bar 21' and multiple first horizontal cathode bars 22' formed on the side of the first vertical cathode bar 21' (on the same side) and parallel to the anode plate 11'. The multiple first horizontal cathode bars 22' are spaced apart and are in the same plane as the first vertical cathode bar 21', so that the first cathode 2' has an overall "comb-shaped" structure.

[0036] There are two sets of second cathodes 3', which are respectively arranged on both sides of the working anode 1', making the two sets of second cathodes 3' symmetrical about the working anode 1'. The two sets of second cathodes 3' correspond one-to-one with the two sets of first cathodes 2', so that the two sets of second cathodes 3' and the two sets of first cathodes 2' are in the same plane. Each set of second cathodes 3' includes a second vertical cathode bar 31' parallel to the first vertical cathode bar 21' and multiple second horizontal cathode bars 32' formed on the side of the second vertical cathode bar 31' and parallel to the anode plate 11'. The multiple second horizontal cathode bars 32' extend in the direction of the corresponding first cathode 2', so that the second cathode 3' also has an overall "comb-shaped" structure. The multiple second horizontal cathode bars 32' are arranged at intervals and alternate with the corresponding first horizontal cathode bars 22'.

[0037] In this embodiment, the number of first horizontal cathode bars 22' is greater than the number of second horizontal cathode bars 32'. Specifically, the number of first horizontal cathode bars 22' can be conventionally selected according to actual needs, and the number of second horizontal cathode bars 32' can also be conventionally selected according to actual needs. However, it is preferable that the number of first horizontal cathode bars 22' is one more than the number of second horizontal cathode bars 32', so that they can be combined into a single unit. Figure 1 The shape.

[0038] In this embodiment, each second horizontal cathode bar 32' is located between two adjacent first horizontal cathode bars 22'. The first cathode 2' and second cathode 3' located in the same plane are defined as the first cathode group, and the distance between the first cathode group and the working anode 1' is 0.5–2 mm (preferably 1 mm). The first horizontal cathode bar 22' and the second horizontal cathode bar 32' are independently spaced 0.5–1.5 mm (preferably 1 mm). The distance between adjacent first horizontal cathode bars 22' and second horizontal cathode bars 32' is 0.3–0.8 mm (preferably 0.5 mm).

[0039] In this embodiment, the distance between the center of the first horizontal cathode bar 22' and the adjacent second horizontal cathode bar 32' is less than or equal to the distance between the first cathode group and the working anode 1', which can reduce the impact of the positive current of the working anode during the reverse reversal of cathode descaling.

[0040] Example 2

[0041] This embodiment provides a polarity reversal descaling system, which includes the electrode module of Embodiment 1, and specifically also includes a DC power supply, terminal A, terminal B, and terminal C. The DC power supply has a positive and a negative terminal. Terminal A is connected to the positive terminal, and terminal B is selectively connected to either the positive or negative terminal. Terminal C is selectively connected to either the positive or negative terminal (the selection method uses conventional methods, such as adjustment via a circuit switch), but terminal C and terminal B are not simultaneously connected to the positive terminal. Figures 2 to 4 As shown. Figure 5 As shown, the working anode 1' is connected to terminal A; the two sets of first cathodes 2' are connected to terminal B in parallel. Figure 5 The dashed lines in the diagram do not represent connected circuits, but indicate a parallel connection; the two sets of second cathodes 3' are connected to the terminal C in parallel.

[0042] Thus, the above-mentioned polarity reversal descaling system has two modes: a working mode and a descaling mode.

[0043] (1) Work mode (e.g.) Figure 2 As shown):

[0044] Terminals B and C are connected to the negative terminal in parallel. The system mainly performs water electrolysis (ozone can be generated under appropriate conditions).

[0045] (2) Descaling Mode 1 (e.g.) Figure 3 As shown): Terminal B is switched to be connected to the positive pole, so that terminals A and B are connected to the positive pole in parallel. At this time, the two sets of second cathodes 3' are in the descaling state, which can be maintained for a period of time (the normal selection can be made as needed).

[0046] Descaling Mode 2 (e.g.) Figure 4 As shown): Terminal B is switched to be connected to the negative pole, and terminal C is switched to be connected to the positive pole, so that terminals A and C are connected to the positive pole in parallel. At this time, the two sets of first cathodes 2' are in the descaling state, which can be maintained for a period of time (the conventional selection can be made as needed).

[0047] Then switch to work mode.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electrode module, characterized in that, It includes: The working anode (1') includes an anode plate (11'), a wiring protrusion (13') formed on the anode plate (11'), and a plurality of through holes (12') opened on the anode plate (11'); Two sets of first cathodes (2') are respectively disposed on both sides of the working anode (1'); each set of first cathodes (2') includes a first vertical cathode bar (21') and multiple first horizontal cathode bars (22') formed on the side of the first vertical cathode bar (21') and parallel to the anode plate (11'), the multiple first horizontal cathode bars (22') are spaced apart; Two sets of second cathodes (3') are respectively disposed on both sides of the working anode (1') and are in the same plane corresponding to the two sets of first cathodes (2'). Each set of second cathodes (3') includes a second vertical cathode bar (31') parallel to the first vertical cathode bar (21') and multiple second horizontal cathode bars (32') formed on the side of the second vertical cathode bar (31') and parallel to the anode plate (11'). The multiple second horizontal cathode bars (32') are spaced apart and alternately arranged with the corresponding first horizontal cathode bars (22').

2. The electrode module according to claim 1, characterized in that: The two sets of first cathodes (2') are symmetrical about the working anode (1'), and the two sets of second cathodes (3') are symmetrical about the working anode (1').

3. The electrode module according to claim 2, characterized in that: The number of the first horizontal cathode strips (22') is greater than the number of the second horizontal cathode strips (32').

4. The electrode module according to claim 3, characterized in that: Each of the second horizontal cathode bars (32') is located between two adjacent first horizontal cathode bars (22').

5. The electrode module according to claim 2, characterized in that: The first cathode (2') and the second cathode (3') located in the same plane are defined as the first cathode group, and the distance between the first cathode group and the working anode (1') is 0.5 to 2 mm.

6. The electrode module according to claim 2 or 5, characterized in that: The first horizontal cathode bar (22') and the second horizontal cathode bar (32') are independently 0.5 to 1.5 mm in diameter.

7. The electrode module according to claim 6, characterized in that: The spacing between adjacent first horizontal cathode bars (22') and second horizontal cathode bars (32') is 0.3 to 0.8 mm.

8. The electrode module according to claim 5, characterized in that: The distance between the center of the first horizontal cathode bar (22') and the adjacent second horizontal cathode bar (32') is less than or equal to the distance between the first cathode group and the working anode (1').

9. A polarity reversal descaling system, characterized in that, It contains the electrode module as described in any one of claims 1 to 8.

10. The polarity reversal descaling system according to claim 9, characterized in that, It includes: A DC power supply having a positive terminal and a negative terminal; Terminal A is connected to the positive terminal. Terminal B, wherein terminal B is selectively connected to either the positive terminal or the negative terminal; Terminal C is selectively connected to either the positive terminal or the negative terminal; terminal C and terminal B are not simultaneously connected to the positive terminal. The working anode (1') is connected to the terminal A; The two sets of first cathodes (2') are connected to the terminal B in parallel; The two sets of second cathodes (3') are connected to the terminal C in parallel.

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