Manganese dioxide electrolytic bath liquid level control device

Abstract

The manganese dioxide electrolytic bath liquid level control device comprises an electrolytic bath, an elbow and a communicating pipe, the lower portion of the electrolytic bath is installed on the ground through an insulation cushion block, the lower end of the elbow extends into the electrolytic bath from the side face of the electrolytic bath, and the lower end of the communicating pipe is connected with the upper end of the elbow through a corrugated pipe; the middle part of the communicating pipe is connected with the outer wall of the electrolytic cell through a connecting block, a first probe, a second probe and a third probe are arranged on the communicating pipe, and the end parts of the first probe and the second probe penetrate into the communicating pipe. The communicating pipe is communicated with the electrolytic cell, so that foam in the electrolytic cell is prevented from affecting liquid level monitoring, the liquid level in the communicating pipe is monitored through the probe, the opening degree of the electric control valve is controlled through the controller, it is guaranteed that the liquid level in the electrolytic cell is maintained at a proper height, waste liquid is discharged, meanwhile, foam layer loss is avoided, and the service life of the electrolytic cell is prolonged. Therefore, it is guaranteed that the upper electrolyte is covered with the foam layer with the enough thickness, and the enough temperature of the electrolyte is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of electrolytic manganese dioxide equipment, and in particular, to a liquid level control device for a manganese dioxide electrolytic cell. Background Art

[0002] Manganese dioxide is an important raw material, mainly used in the fields of batteries and metallurgy. Among them, electrolytic manganese dioxide (EMD) is the main production method of manganese dioxide. Existing electrolytic manganese dioxide generally uses manganese sulfate solution as the electrolyte, titanium alloy as the anode, and graphite as the cathode, and an electrolysis reaction is carried out in an electrolytic cell, so that manganese dioxide is deposited on the anode. During electrolysis, in order to increase the electrolysis current, the electrolyte in the electrolytic cell needs to be maintained above 90 °C. Therefore, steam or water is needed to continuously heat the electrolyte, while adding new electrolyte and allowing the old electrolyte to flow away from the overflow port at the upper part of the electrolytic cell. Since space needs to be left for the electrode plates, the heating device is generally arranged at the lower part of the electrolytic cell, which causes the heat of the upper layer of electrolyte to dissipate into the air. For this reason, some enterprises add foaming agents to the electrolyte to form a foam layer on the upper layer of the electrolyte, and achieve the purpose of heat preservation through the foam layer to reduce heat loss. However, some foams will flow away through the overflow port, resulting in insufficient thickness of the foam layer and affecting the heat preservation effect. For example, Chinese Patent with application number 201510354091.3 discloses an electrolysis system for manganese dioxide and its production method. They set the overflow pipe between the electrolyte and the foam layer. However, the liquid level of the electrolyte will change according to the flow rate of the incoming and outgoing electrolyte. When the liquid level of the electrolyte is lower than the overflow pipe, there will still be foams flowing out of the overflow pipe. And since the liquid level in the electrolytic cell is covered by the foam layer, workers cannot accurately judge the liquid level. Therefore, a liquid level control device for a manganese dioxide electrolytic cell is needed. It is connected to the electrolytic cell through a connecting pipe to avoid the influence of the foam in the electrolytic cell on the liquid level monitoring, and by monitoring the liquid level in the connecting pipe, the flow rate of the electrolyte entering and leaving the electrolytic cell is controlled to ensure that the overflow pipe is below the foam layer and avoid the loss of the foam layer, so as to ensure the temperature of the upper layer of electrolyte. Summary of the Utility Model

[0003] In order to solve the above problems, this application proposes a liquid level control device for a manganese dioxide electrolytic cell. It is connected to the electrolytic cell through a connecting pipe to avoid the influence of the foam in the electrolytic cell on the liquid level monitoring, and by monitoring the liquid level in the connecting pipe, the flow rate of the electrolyte entering and leaving the electrolytic cell is controlled to ensure that the overflow pipe is below the foam layer and avoid the loss of the foam layer, so as to ensure the temperature of the upper layer of electrolyte.

[0004] This application is achieved through the following technical solutions:

[0005] This application provides a liquid level control device for a manganese dioxide electrolytic cell, comprising: an electrolytic cell, an elbow, and a connecting pipe. The lower part of the electrolytic cell is installed on the ground through insulating pads. The lower end of the elbow extends from the side of the electrolytic cell into the electrolytic cell. The lower end of the connecting pipe is connected to the upper end of the elbow through a corrugated pipe. The middle part of the connecting pipe is connected to the outer wall of the electrolytic cell through a connecting block. The connecting pipe is provided with a first probe, a second probe, and a third probe. The ends of the first probe and the second probe penetrate into the connecting pipe. A cover body is provided at the upper part of the connecting pipe, and the third probe is vertically installed in the connecting pipe through the cover body.

[0006] Further, the cover body is installed at the upper part of the connecting pipe. The third probe passes through the cover body, and the cover body is connected to the third probe through a first locking nut.

[0007] Further, the cover body is provided with a plurality of air holes.

[0008] Further, the connecting pipe passes through the connecting block in the vertical direction, and the connecting block is connected to the connecting pipe through a second locking nut.

[0009] Further, it further comprises a controller. The controller is provided with a positive electrode jack and two negative electrode jacks. The first probe is electrically connected to the positive electrode jack, and the second probe and the third probe are electrically connected to the negative electrode jacks.

[0010] Further, the electrolytic cell is provided with an overflow pipe and a liquid inlet pipe. The overflow pipe is communicated with the upper part of the electrolytic cell, and the liquid inlet pipe is communicated with the lower part of the electrolytic cell. Electric control valves are provided at the upper parts of the overflow pipe and the liquid inlet pipe, and the electric control valves are electrically connected to the controller.

[0011] Further, the outer sides of the first probe, the second probe, and the third probe are wrapped with insulating layers.

[0012] The beneficial effects of this application: By connecting the connecting pipe with the electrolytic cell, it avoids the influence of foam in the electrolytic cell on the liquid level monitoring. The liquid level in the connecting pipe is monitored through probes and the opening degree of the electric control valve is controlled by the controller, ensuring that the liquid level in the electrolytic cell is maintained at an appropriate height. While realizing the discharge of waste liquid, it avoids the loss of the foam layer, thereby ensuring that there is a foam layer with a sufficient thickness covering the upper layer of the electrolyte to ensure the sufficient temperature of the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the connecting pipe of the present utility model;

[0015] Figure 3 is a schematic structural diagram of the cover body of the present utility model;

[0016] Figure 4 Structural schematic diagram of the first probe of the present utility model;

[0017] In the figure: 1 - electrolytic cell, 2 - elbow, 3 - connecting pipe, 4 - bellows, 5 - connecting block, 6 - first probe, 7 - second probe, 8 - third probe, 9 - cover body, 10 - first locking nut, 11 - second locking nut, 12 - controller, 13 - overflow pipe, 14 - liquid inlet pipe, 15 - electric control valve, 16 - insulating layer, 17 - heater, 18 - insulating spacer. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0021] Such as Figures 1 to 4As shown in the figure, an embodiment of the present utility model provides a liquid level control device for a manganese dioxide electrolytic cell, comprising: an electrolytic cell 1, an elbow 2, and a connecting pipe 3. The lower part of the electrolytic cell 1 is installed on the ground through an insulating cushion block 18. The lower end of the elbow 2 extends from the side of the electrolytic cell 1 into the electrolytic cell 1. The lower end of the connecting pipe 3 is connected to the upper end of the elbow 2 through a corrugated pipe 4. The middle part of the connecting pipe 3 is connected to the outer wall of the electrolytic cell 1 through a connecting block 5. A first probe 6, a second probe 7, and a third probe 8 are arranged on the connecting pipe 3. The ends of the first probe 6 and the second probe 7 penetrate into the connecting pipe 3. A cover body 9 is arranged on the upper part of the connecting pipe 3. The third probe 8 is vertically installed in the connecting pipe 3 through the cover body 9.

[0022] After the electrolytic plate is put into the tank, the electrolyte is added into the electrolytic cell 1 through the liquid inlet pipe 14. While the electrolyte is being filled, the electrolyte is heated through the heater 17 at the bottom of the electrolytic cell 1, causing the temperature of the electrolyte to rise. The bottom and side walls of the electrolytic cell can play a role in heat preservation, while the upper part of the electrolytic cell 1 is open. To improve the heat preservation effect, a foaming agent can be added to the electrolyte, causing bubbles to form in the upper layer of the electrolyte and improving the heat preservation effect of the upper layer of the electrolyte. During electrolysis, due to the precipitation of manganese dioxide, the manganese ions in the electrolyte decrease. Therefore, it is necessary to continuously add new electrolyte into the electrolytic cell 1 through the liquid inlet pipe 14, while the old electrolyte is discharged through the overflow pipe 13 at the upper part of the electrolytic cell 1, thereby ensuring the concentration of the electrolyte. To avoid the loss of foam when the old electrolyte is discharged, the liquid level of the electrolyte needs to be maintained at a position 5 cm to 10 cm above the upper part of the overflow pipe 13. Therefore, the application installs a connecting pipe 3 outside the electrolytic cell 1. The connecting pipe 3 is connected to the electrolytic cell 1 through a corrugated pipe 4 and an elbow 2. The electrolyte in the middle of the electrolytic cell 1 enters the connecting pipe 3. The electrolyte at this position does not contain foam and is not likely to affect the detection result. By adjusting the position of the connecting pipe 3 on the connecting block 5, the height of the first probe 6 and the second probe 7 is 1 cm to 2 cm higher than the upper edge of the overflow pipe 13. Then, the position of the lower end of the third probe 8 is adjusted so that the lower end of the third probe 8 is 5 cm to 10 cm higher than the first probe 6 and the second probe 7. The first probe 6 is connected to the positive jack of the controller 12, and the second probe 7 and the third probe 8 are respectively connected to the two negative jacks of the controller 12. When the liquid level in the connecting pipe 3 is lower than the first probe 6 and the second probe 7, at this time, the second probe 7 cannot detect current, indicating that the liquid level in the electrolytic cell 1 is lower than the upper edge of the overflow pipe 13. Then the controller 12 controls the electric control valve 15 on the overflow pipe 13 to remain closed to avoid the loss of the foam layer. After the electrolyte continuously enters the electrolytic cell 1 through the liquid inlet pipe 14, the liquid level rises, and the liquid level in the connecting pipe 3 also rises synchronously. When the liquid level is flush with the first probe 6 and the second probe 7 and higher than the first probe 6 and the second probe 7, there is current flowing between the second probe 7 and the first probe 6. After the controller 12 detects that the first probe 6 and the second probe 7 are conducting, it indicates that the liquid level in the electrolytic cell 1 is higher than the upper edge of the overflow pipe 13. At this time, the opening degree of the electric control valve 15 on the overflow pipe 13 is gradually increased to discharge the old electrolyte. After the liquid level continues to rise, the electrolyte contacts the third probe 8. After the controller 12 detects that the first probe 6 and the third probe 8 are conducting, it indicates that the liquid level in the electrolytic cell 1 is too high. At this time, the opening degree of the electric control valve 15 on the liquid inlet pipe 14 is reduced to gradually lower the liquid level. The controller 12 detects the conduction situation of the three probes every 15 seconds to 30 seconds and controls the two electric control valves 15 according to the above logic, thereby maintaining the liquid level in the electrolytic cell 1 at a reasonable height during electrolysis, discharging the old electrolyte while avoiding the loss of the foam layer, maintaining the temperature of the upper layer of the electrolyte, reducing energy consumption, and ensuring that electrolysis can be carried out at a higher current to improve the electrolysis speed and quality.

[0023] In a specific embodiment, as Figure 3 shown, the cover 9 is installed on the upper part of the connecting pipe 3, the third probe 8 passes through the cover 9, and the cover 9 is connected to the third probe 8 through the first locking nut 10. The third probe 8 can slide on the cover 9, so as to adjust the height of the lower end of the third probe 8.

[0024] Specifically, a plurality of air holes are provided on the cover 9 to balance the air pressure in the upper part of the connecting pipe 3.

[0025] In a preferred embodiment, as Figure 2 shown, the connecting pipe 3 passes through the connecting block 5 in the vertical direction, and the connecting block 5 is connected to the connecting pipe 3 through the second locking nut 11. The connecting pipe 3 can adjust its position on the connecting block 5 so that the heights of the first probe 6 and the second probe 7 are 1 cm to 2 cm higher than the upper edge of the overflow pipe 13.

[0026] Specifically, it further includes a controller 12. The controller 12 is provided with a positive electrode jack and two negative electrode jacks. The first probe 6 is electrically connected to the positive electrode jack, and the second probe 7 and the third probe 8 are electrically connected to the negative electrode jacks. By detecting the conduction conditions between the second probe 7 and the first probe 6 and between the third probe 8 and the first probe 6 through the controller 12, the height of the liquid level in the electrolytic cell 1 is judged, so as to reasonably control the opening degrees of the two electric control valves 15, maintain the liquid level in the electrolytic cell 1 at a reasonable height during electrolysis, avoid the loss of the foam layer while discharging the old electrolyte, maintain the temperature of the upper layer of the electrolyte, reduce energy consumption, and ensure that electrolysis can be carried out with a higher current, thereby improving the electrolysis speed and quality.

[0027] Preferably, the electrolytic cell 1 is provided with an overflow pipe 13 and a liquid inlet pipe 14. The overflow pipe 13 is communicated with the upper part of the electrolytic cell 1, and the liquid inlet pipe 14 is communicated with the lower part of the electrolytic cell 1. Electric control valves 15 are provided on the upper parts of both the overflow pipe 13 and the liquid inlet pipe 14, and the electric control valves 15 are electrically connected to the controller 12. The automatic control of the electric control valves 15 is realized through the controller 12 to maintain the height of the liquid level in the electrolytic cell 1.

[0028] Preferably, as Figure 4 shown, the outer sides of the first probe 6, the second probe 7, and the third probe 8 are wrapped with an insulating layer 16, so that the first probe 6, the second probe 7, and the third probe 8 can be installed on the connecting pipe 3 to avoid generating interfering current.

[0029] Preferably, the connecting pipe 3 is made of transparent PC plastic material, which is convenient for observing the liquid level height and at the same time avoids conduction.

[0030] Of course, the present application may also have many other implementation manners. Based on this implementation manner, all other implementation manners obtained by those of ordinary skill in the art without any creative work fall within the scope protected by the present application.

Claims

1. A manganese dioxide electrolytic cell liquid level control device, characterized in that: include: An electrolytic cell (1), an elbow (2), and a connecting pipe (3), wherein the lower part of the electrolytic cell (1) is installed on the ground via an insulating pad (18), the lower end of the elbow (2) extends from the side of the electrolytic cell (1) into the electrolytic cell (1), the lower end of the connecting pipe (3) is connected to the upper end of the elbow (2) via a corrugated pipe (4); the middle part of the connecting pipe (3) is connected to the outer wall of the electrolytic cell (1) via a connecting block (5), the connecting pipe (3) is provided with a first probe (6), a second probe (7), and a third probe (8), the ends of the first probe (6) and the second probe (7) penetrate into the connecting pipe (3), the upper part of the connecting pipe (3) is provided with a cover body (9), and the third probe (8) is vertically installed in the connecting pipe (3) via the cover body (9).

2. A manganese dioxide electrolytic cell liquid level control device according to claim 1, characterized in that: The cover body (9) is installed on the upper part of the connecting pipe (3), the third probe (8) passes through the cover body (9), and the cover body (9) is connected to the third probe (8) through a first locking nut (10).

3. A manganese dioxide electrolytic cell liquid level control device according to claim 1, characterized in that: The cover body (9) is provided with a plurality of air holes.

4. A manganese dioxide electrolytic cell liquid level control device according to claim 1, characterized in that: The connecting pipe (3) passes through the connecting block (5) in a vertical direction, and the connecting block (5) is connected to the connecting pipe (3) via a second locking nut (11).

5. A manganese dioxide electrolytic cell liquid level control device according to claim 1, characterized in that: It also includes a controller (12), wherein the controller (12) is provided with a positive electrode socket and two negative electrode sockets, the first probe (6) is electrically connected to the positive electrode socket, and the second probe (7) and the third probe (8) are electrically connected to the negative electrode sockets.

6. A manganese dioxide electrolytic cell liquid level control device according to claim 5, characterized in that: The electrolytic cell (1) is provided with an overflow pipe (13) and a liquid inlet pipe (14), wherein the overflow pipe (13) is connected to the upper part of the electrolytic cell (1), and the liquid inlet pipe (14) is connected to the lower part of the electrolytic cell (1), and the upper parts of the overflow pipe (13) and the liquid inlet pipe (14) are both provided with electric control valves (15), and the electric control valves (15) are both electrically connected to the controller (12).

7. A manganese dioxide electrolytic cell liquid level control device according to claim 1, characterized in that: The first probe (6), the second probe (7) and the third probe (8) are wrapped with an insulating layer (16) on the outside.

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