Electrochemical descaling device

Abstract

This utility model relates to an electrochemical descaling device, including a descaling tank with an inlet and an outlet. The descaling tank contains a first-stage electrochemical reaction zone, in which multiple first electrode plates are arranged in parallel. A water distributor connected to the inlet is located within the descaling tank. The water distributor has multiple groups of water distribution holes, the number of which is the same as the number of first electrode plates and is configured in a one-to-one correspondence. The water outlet direction of each hole in each group is towards the surface of the corresponding first electrode plate, and the angle between the outlet and the surface of the first electrode plate is greater than 0° and less than 90°. In this utility model, by configuring a water distributor in the descaling tank, the water outlet can tangentially impact the surface of the first electrode plates, effectively removing scale adhering to the surface of the first electrode plates while water is entering, thereby improving the electrochemical descaling effect and reducing the frequency of electrode plate cleaning.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to an electrochemical descaling device. Background Technology

[0002] Wastewater softening in incineration plants is a key step in environmental governance and resource recycling in the waste-to-energy industry. Unsoftened wastewater is prone to scaling in pipes, pumps, valves, and heat exchangers, leading to decreased heat transfer efficiency, increased energy consumption, and even equipment failure. In addition, it can also affect the service life of critical equipment such as reverse osmosis membranes and evaporators.

[0003] Currently, softening processes include lime softening, ion exchange, membrane softening, and electrochemical softening. Among these, electrochemical softening is widely used due to its high efficiency, lack of chemical additives, selective removal of target ions, and relatively low sludge production. However, during electrochemical softening, calcium and magnesium scale tend to accumulate on the cathode electrode surface, affecting the electrochemical descaling effect and requiring frequent shutdowns to remove and clean the electrode plates, thus impacting production efficiency. Utility Model Content

[0004] This utility model relates to an electrochemical descaling device, which can at least solve some of the defects of the prior art.

[0005] This utility model relates to an electrochemical descaling device, including a descaling tank with an inlet and an outlet. The descaling tank contains a first-stage electrochemical reaction zone, in which multiple first electrode plates are arranged in parallel. A water distributor connected to the inlet is located within the descaling tank. The water distributor has multiple groups of water distribution holes, the number of which is the same as the number of first electrode plates and they are configured in a one-to-one correspondence. The water outlet direction of each water distribution hole in each group is towards the surface of the corresponding first electrode plate, and the water outlet has an angle greater than or equal to 0° and less than or equal to 30° with the surface of the first electrode plate.

[0006] As one implementation method, in each water distribution hole group, some water distribution holes are first water distribution holes with the water outlet direction facing the first plate surface corresponding to the first electrode plate, and the remaining water distribution holes are second water distribution holes with the water outlet direction facing the second plate surface corresponding to the first electrode plate.

[0007] The water distribution holes are arranged in multiple rows on the water distributor;

[0008] In each row of water distribution holes, some water distribution holes constitute the first water distribution hole of an adjacent first electrode plate, and the remaining water distribution holes constitute the second water distribution hole of another adjacent first electrode plate.

[0009] As one embodiment, the angle between the water outlet direction of the water distribution hole and the surface of the corresponding first electrode plate is in the range of 15° to 30°.

[0010] As one embodiment, an electrode plate cleaning mechanism is also arranged in the first-stage electrochemical reaction zone. The electrode plate cleaning mechanism includes a mounting frame, a plurality of descaling brushes arranged on the mounting frame, and a lifting control unit for driving the mounting frame to rise and fall. The number of descaling brushes is the same as the number of first electrode plates and they are configured in a one-to-one correspondence. The bristles of the descaling brushes are close to or in contact with the plate surface of the corresponding first electrode plate.

[0011] As one embodiment, the descaling tank is further provided with a second-stage electrochemical reaction zone, in which multiple second electrode plates are arranged in parallel; the first-stage electrochemical reaction zone and the second-stage electrochemical reaction zone are separated by a partition unit and a connecting channel connecting the two reaction zones is formed at the partition unit, and the water outlet is connected to the second-stage electrochemical reaction zone.

[0012] As one embodiment, the baffle unit includes multiple baffles, and the multiple baffles are distributed in a baffle structure.

[0013] As one implementation method, a guide plate is provided at the outlet of the connecting channel, and the water outlet direction defined by the guide plate is parallel to the surface of the second electrode plate.

[0014] As one implementation method, the water outlet end of the guide plate is tilted upwards relative to the horizontal plane.

[0015] As one embodiment, the surface of the second electrode plate is perpendicular to the surface of the first electrode plate.

[0016] This utility model has at least the following beneficial effects:

[0017] In this invention, by configuring a water distributor in the descaling tank and making the water outlet direction of the water distribution hole have an angle greater than or equal to 0° and less than or equal to 30° with the corresponding first electrode plate surface, the water outlet of the water distributor can tangentially impact the surface of the first electrode plate, effectively removing the dirt attached to the surface of the first electrode plate while water is entering, thereby improving the electrochemical descaling effect and reducing the cleaning frequency of the electrode plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of the electrochemical descaling device provided in the embodiments of this utility model;

[0020] Figure 2 This is a schematic diagram of the arrangement structure of the water distributor and each first electrode plate;

[0021] Figure 3 This is a cross-sectional view of an electrochemical descaling device. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1-3 This utility model provides an electrochemical descaling device, including a descaling tank 1. The descaling tank 1 is provided with an inlet 11 and an outlet 12. The descaling tank 1 is provided with a first-stage electrochemical reaction zone, in which multiple first electrode plates 21 are arranged in parallel. A water distributor 22 communicating with the inlet 11 is provided in the descaling tank 1. The water distributor 22 is provided with multiple water distribution hole groups. The number of water distribution hole groups is the same as the number of first electrode plates 21 and they are configured one-to-one. The water outlet direction of each water distribution hole 221 in each water distribution hole group is towards the plate surface of the corresponding first electrode plate 21 and has an angle greater than or equal to 0° and less than or equal to 30° with the plate surface of the first electrode plate 21.

[0024] Among the aforementioned multiple first electrode plates 21, some are anode plates and the rest are cathode plates. Preferably, the anode plates and cathode plates are distributed in a cross pattern, that is, there is a cathode plate between every two adjacent anode plates and an anode plate between every two adjacent cathode plates. This method can improve the descaling efficiency and effect.

[0025] Preferably, the aforementioned multiple first electrode plates 21 are combined into a first electrode plate group and a second electrode plate group. Each of the first and second electrode plate groups includes multiple first electrode plates 21. Each first electrode plate 21 in the first electrode plate group is connected to one pole of the power supply, and each first electrode plate 21 in the second electrode plate group is connected to the other pole of the power supply. Simultaneously, an electrode switching circuit is configured to switch the electrodes connected to the first and second electrode plate groups. That is, within one reaction cycle, the first electrode plate group is connected to the positive pole of the power supply, and the second electrode plate group is connected to the negative pole. In the next reaction cycle, the first electrode plate group is connected to the negative pole of the power supply, and the second electrode plate group is connected to the positive pole, and so on. This method can uniformly descale, improve the overall descaling rate, and facilitate the cleaning and removal of dirt from the electrode surface. The electrode switching circuit can achieve the electrode switching function using methods such as electromagnetic reversing valves.

[0026] Preferably, the surface of the first electrode plate 21 is parallel to the vertical direction, and some of the dirt formed on the surface of the cathode plate can settle under its own weight.

[0027] In this embodiment, by configuring a water distributor 22 in the descaling tank 1 and making the water outlet direction of the water distribution hole 221 have an angle greater than or equal to 0° and less than or equal to 30° with the corresponding first electrode plate 21, the water outlet of the water distributor 22 can tangentially impact the surface of the first electrode plate 21, effectively removing the dirt attached to the surface of the first electrode plate 21 while water is entering, thereby improving the electrochemical descaling effect and reducing the cleaning frequency of the electrode plate.

[0028] When the angle between the water distribution hole 221 and the first electrode plate 21 is 0°, that is, the water outlet direction of the water distribution hole 221 is parallel to the surface of the first electrode plate 21; more preferably, the angle between the water outlet direction of the water distribution hole 221 and the surface of the first electrode plate 21 is greater than 0° and less than or equal to 30°. Compared with the method of parallel flushing of the surface of the first electrode plate 21, this method has a better effect on cleaning dirt.

[0029] In one embodiment, in each water distribution hole group, some water distribution holes 221 are first water distribution holes with the water outlet direction facing the first plate surface corresponding to the first electrode plate 21, and the remaining water distribution holes 221 are second water distribution holes with the water outlet direction facing the second plate surface corresponding to the first electrode plate 21. That is, the water distribution hole group can rinse both sides of the first electrode plate 21, ensuring the rinsing and removal effect of dirt on the surface of the first electrode plate 21.

[0030] Optionally, the water distribution holes 221 are arranged in multiple rows on the water distributor 22; in each row of water distribution holes, some water distribution holes 221 are configured as first water distribution holes on an adjacent first electrode plate 21, and the remaining water distribution holes 221 are configured as second water distribution holes on another adjacent first electrode plate 21. This arrangement facilitates the arrangement of the water distribution holes 221, wherein the axis of each water distribution hole 221 in each row of water distribution holes is located between two adjacent first electrode plates 21, preferably the two first electrode plates 21 are symmetrically arranged with respect to the axis of the water distribution holes in the row of water distribution holes.

[0031] Preferably, the angle between the water outlet direction of the water distribution hole 221 and the surface of the corresponding first electrode plate 21 is within the range of 15° to 30°, which can achieve a better tangential impact effect.

[0032] In one embodiment, such as Figure 1 and Figure 3 The first-stage electrochemical reaction zone is also equipped with an electrode plate cleaning mechanism. The electrode plate cleaning mechanism includes a mounting frame 231, a plurality of descaling brushes 233 disposed on the mounting frame 231, and a lifting control unit 232 for driving the mounting frame 231 to rise and fall. The number of descaling brushes 233 is the same as the number of first electrode plates 21 and they are configured in a one-to-one correspondence. The bristles of the descaling brushes 233 are close to or in contact with the plate surface of the corresponding first electrode plate 21.

[0033] The lifting control unit 232 drives the mounting bracket 231 to rise and fall, which in turn drives the descaling brush 233 to scrub the surface of the first electrode plate 21. This effectively cleans the dirt attached to the surface of the first electrode plate 21, thereby improving the electrochemical descaling effect. Since it is an online cleaning process, the electrode plate can be removed for cleaning without stopping the machine. The operation is convenient and reliable, reducing the adverse effects on wastewater softening and subsequent treatment.

[0034] Based on the online cleaning method, when using the descaling brush 233 to descale, switching the positive and negative terminals of the power supply can accelerate the cleaning of scale on the cathode surface. After the cathode plate is switched to the anode plate, an oxygen / chlorine gas evolution reaction will occur, which can peel off the scale attached to the surface of the plate.

[0035] The aforementioned lifting control unit 232 can be driven directly by a cylinder, hydraulic cylinder, or other similar means; it can also be driven by a motor and transmission mechanism, including but not limited to a lead screw mechanism (the lead screw is connected to the motor output shaft, and the lead screw nut is mounted on the mounting bracket 231); or it can be driven manually by a handwheel and transmission mechanism. The cylinder / hydraulic cylinder / motor / handwheel, etc., can be installed on the outer wall of the descaling tank 1.

[0036] In the above structure, the mounting frame 231 includes a main rod 2311 and multiple sets of support rods 2312. The main rod 2311 is connected to the lifting control unit 232, and each support rod 2312 is connected to the main rod 2311 so that each descaling brush 233 can be synchronously lifted and lowered through a mounting frame 231. Preferably, each set of support rods 2312 includes two support rods 2312 respectively disposed on both sides of the corresponding first electrode plate 21, and descaling brushes 233 are respectively disposed on the two support rods 2312 to clean the two side surfaces of the first electrode plate 21.

[0037] like Figure 3 A mud hopper is provided in the first-stage electrochemical reaction zone to collect the settled dirt.

[0038] Further optimization of the above-mentioned electrochemical descaling device, such as... Figures 1-3 The descaling tank 1 is also provided with a second-stage electrochemical reaction zone, in which multiple second electrode plates 31 are arranged in parallel; the first-stage electrochemical reaction zone and the second-stage electrochemical reaction zone are separated by a partition unit and a connecting channel connecting the two reaction zones is formed at the partition unit, and the water outlet 12 is connected to the second-stage electrochemical reaction zone.

[0039] By coupling the first-stage electrochemical reaction zone with the second-stage electrochemical reaction zone, two-stage descaling and softening of wastewater can be achieved, which can effectively improve the descaling and softening effect of wastewater.

[0040] Among the aforementioned multiple second electrode plates 31, some are anode plates and the rest are cathode plates. Similarly, it is preferable to adopt a method in which the anode plates and cathode plates are cross-distributed. In addition, it is also preferable to adopt a method in which the positive and negative poles of the plates can be switched. The specific structure will not be described in detail here.

[0041] Preferably, the surface of the second electrode plate 31 is parallel to the vertical direction, allowing some of the dirt formed on the cathode plate surface to settle under its own weight. Further, as... Figures 1-3 The surface of the second electrode plate 31 is perpendicular to the surface of the first electrode plate 21. This arrangement facilitates the rinsing of the surface of the second electrode plate 31 by the water effluent from the first-stage electrochemical reaction zone, thereby improving the reaction effect of the second-stage electrochemical reaction zone and reducing the cleaning frequency of the second electrode plate 31.

[0042] like Figure 3 A mud hopper is provided in the second-stage electrochemical reaction zone to collect the settled dirt.

[0043] In one embodiment, such as Figures 1-3 The baffle unit includes multiple baffles, and these baffles are distributed in a baffle structure 41. The baffle structure 41 facilitates the settling of scale in the water, thereby increasing the descaling frequency. Optionally, as... Figures 1-3There are two partitions. The first partition 411 is adjacent to the first-stage electrochemical reaction zone. Its bottom end is connected to the bottom of the descaling tank 1, and its top end is a certain distance from the top of the descaling tank 1. The water effluent from the first-stage electrochemical reaction zone overflows through the first partition 411. The second partition 412 is adjacent to the second-stage electrochemical reaction zone. Its bottom end is a certain distance from the bottom of the descaling tank 1, and its top end is connected to the top of the descaling tank 1. The water effluent from the first-stage electrochemical reaction zone enters the second-stage electrochemical reaction zone through the bottom of the second partition 412.

[0044] More preferably, such as Figure 3 A guide plate 42 is provided at the outlet of the connecting channel. The water outlet direction defined by the guide plate 42 is parallel to the surface of the second electrode plate 31. This not only reduces the impact of the water flow on the mud hopper area below the second-stage chemical reaction zone, but also allows the water flow to wash the surface of the second electrode plate 31, reducing dirt adhesion. Preferably, as follows... Figure 3 The water outlet end of the guide plate 42 is tilted upward relative to the horizontal surface, causing the water to flow upward, which can better flush the surface of the second electrode plate 31.

[0045] In addition, such as Figure 3 The guide plate 42 is an arc-shaped plate with its center side facing the second-stage chemical reaction zone, which is beneficial to the guiding effect of water flow and reduces the wear of water flow on the guide plate 42.

[0046] Optionally, such as Figure 1 and Figure 3 An overflow weir 32 is provided in the second-stage chemical reaction zone. The overflow weir 32 is connected to the inner wall of the descaling tank 1 and is located near the top of the descaling tank 1. An overflow trough is formed by the overflow weir 32, and the outlet 12 of the descaling tank 1 is connected to the overflow trough.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrochemical descaling device comprising a descaling tank, a water inlet and a water outlet are arranged on the descaling tank, characterized in that: The descaling tank is equipped with a first-stage electrochemical reaction zone, in which multiple first electrode plates are arranged in parallel. The descaling tank is equipped with a water distributor that communicates with the water inlet. The water distributor is equipped with multiple water distribution hole groups, the number of which is the same as the number of first electrode plates and is configured in a one-to-one correspondence. The water outlet direction of each water distribution hole in each water distribution hole group is towards the surface of the corresponding first electrode plate and has an angle greater than or equal to 0° and less than or equal to 30° with the surface of the first electrode plate.

2. The electrochemical descaling device of claim 1, wherein: In each group of water distribution holes, some water distribution holes are first water distribution holes with the water outlet direction facing the first plate surface of the corresponding first electrode plate, and the remaining water distribution holes are second water distribution holes with the water outlet direction facing the second plate surface of the corresponding first electrode plate.

3. The electrochemical descaling device of claim 2, wherein: The water distribution holes are arranged in multiple rows on the water distributor; In each row of water distribution holes, some water distribution holes constitute the first water distribution hole of an adjacent first electrode plate, and the remaining water distribution holes constitute the second water distribution hole of another adjacent first electrode plate.

4. The electrochemical descaling device of claim 1, wherein: The angle between the water outlet direction of the water distribution hole and the surface of the corresponding first electrode plate is in the range of 15° to 30°.

5. The electrochemical descaling device of claim 1, wherein: An electrode plate cleaning mechanism is also arranged in the first-stage electrochemical reaction zone. The electrode plate cleaning mechanism includes a mounting frame, a plurality of descaling brushes arranged on the mounting frame, and a lifting control unit for driving the mounting frame to rise and fall. The number of descaling brushes is the same as the number of first electrode plates and they are configured in a one-to-one correspondence. The bristles of the descaling brushes are close to or in contact with the plate surface of the corresponding first electrode plate.

6. An electrochemical descaling device according to any one of claims 1 to 5, characterised in that: The descaling tank is also equipped with a second-stage electrochemical reaction zone, in which multiple second electrode plates are arranged in parallel. The first-stage electrochemical reaction zone and the second-stage electrochemical reaction zone are separated by a partition unit, and a connecting channel connecting the two reaction zones is formed at the partition unit. The water outlet is connected to the second-stage electrochemical reaction zone.

7. The electrochemical descaling device of claim 6, wherein: The baffle unit includes multiple baffles, and the multiple baffles are distributed in a baffle structure.

8. The electrochemical descaling device as described in claim 6, characterized in that: A guide plate is provided at the outlet of the connecting channel, and the water outlet direction defined by the guide plate is parallel to the surface of the second electrode plate.

9. The electrochemical descaling device of claim 8, wherein: The water outlet end of the guide plate is tilted upwards relative to the horizontal surface.

10. The electrochemical descaling device of claim 6, wherein: The surface of the second electrode plate is perpendicular to the surface of the first electrode plate.

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