Electrolytic cell anolyte shutoff device

Abstract

The utility model discloses an electrolytic bath anode liquid cut-off device belongs to metal electrolytic smelting equipment technical field. The device includes collection box, liquid level detection unit and electric control cut -off unit, the collection box is located electrolytic bath anode liquid chute mouth right below, is used for receiving and temporarily storing the anode liquid of overflow, and its tank bottom is equipped with drain port, anode liquid chute one end is connected the chute mouth, and the other end extends to the inside of collection box, the electric control cut -off unit is equipped in the pipeline of drain port, liquid level detection unit is equipped in collection box, is used for monitoring the liquid level in the box, and can reach the output control signal to electric control cut -off unit when liquid level reaches the preset height, drives it to open to discharge the hydrops. The utility model through intermittent type automatic discharge anode liquid, effectively destroys the conductive liquid bridge formed between chute mouth and chute, fundamentally cuts off the current bypass, has the advantages such as simple structure, high degree of automation, energy -conserving effect is remarkable and the advantage such as low reformation cost.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal hydrometallurgy technology, and in particular to an overflow control and energy-saving device for the anolyte of electrolytic cells used in the production of electrolytic manganese, electrolytic zinc, electrolytic copper and the like. Background Technology

[0002] In the hydrometallurgical smelting of metals such as manganese and zinc, fresh electrolyte is continuously added to the electrolytic cell. The anolyte participating in the electrochemical reaction continuously overflows from the anolyte outlet on the side of the cell, flowing into the connected anolyte sluice, and finally collecting and returning to the front-end processing system for recycling. The overflowing anolyte contains a high concentration of sulfates (such as manganese sulfate, zinc sulfate, and ammonium sulfate), exhibiting excellent conductivity. This continuously flowing anolyte forms a continuous, highly conductive liquid metal bridge between the anolyte outlet and the anolyte sluice, constituting a current bypass. This causes some current to bypass the cathode plate for effective metal deposition, instead flowing directly through this liquid bypass via a short circuit, resulting in significant DC energy waste and increasing the power consumption per unit product and production costs.

[0003] Currently, this issue is generally not given enough attention in the industry, and there is no mature, efficient, automated, and low-cost solution to fundamentally eliminate this current bypass. Common practices include allowing the anolyte to overflow continuously or using simple mechanical valves for coarse manual intermittent discharge. The latter cannot achieve precise automatic control, resulting in unstable energy-saving effects and increased operational burden. Therefore, developing a device that can automatically, reliably, and effectively cut off this current bypass is of great significance for energy conservation and emission reduction in the electrolytic metallurgy industry. Summary of the Invention

[0004] The technical problem this invention aims to solve is to address the aforementioned deficiencies in existing technologies. The purpose of this invention is to overcome the shortcomings of existing technologies and provide an electrolytic cell anolyte flow interruption device that is simple in structure, highly automated, reliable in operation, and low in modification cost. This device effectively disrupts and cuts off the conductive liquid bridge formed between the chute and the trough by changing the continuous overflow of the anolyte to controlled intermittent discharge, thereby fundamentally eliminating current bypass and achieving the goal of reducing the DC power consumption of electrolysis and saving energy.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an electrolytic cell anolyte flow interruption device, characterized in that it includes: a collection tank, a liquid level detection unit, and an electrically controlled flow interruption unit; the collection tank is located directly below the anolyte chute of the electrolytic cell, used to receive and temporarily store the anolyte overflowing from the chute, and the bottom of the collection tank is provided with a drain port; the inlet end of the anolyte chute is connected to the anolyte chute on the side of the electrolytic cell, and its outlet end extends to the internal cavity of the collection tank; the electrically controlled flow interruption unit is installed on the pipeline flow path of the drain port; the liquid level detection unit is installed on the collection tank, used to monitor the liquid level height in the collection tank in real time, and the signal output end of the liquid level detection unit is communicatively connected to the control end of the electrically controlled flow interruption unit, used to trigger the electrically controlled flow interruption unit to open and discharge the accumulated liquid when the liquid level in the collection tank reaches a preset high level, and to control it to close after the liquid level drops or after a delay.

[0006] Furthermore, the liquid level detection unit can be a float-type liquid level switch or a capacitive liquid level sensor.

[0007] Furthermore, the electrically controlled interruption unit can be a normally closed solenoid valve.

[0008] Furthermore, the device may also include a controller (such as a PLC or a simple control circuit), the signal output terminal of the liquid level detection unit is connected to the input terminal of the controller, the controller receives the liquid level signal and performs logical judgment, and then outputs control commands to drive the opening and closing of the electrically controlled flow interruption unit to realize more complex control logic (such as delayed shutdown, frequency adjustment, etc.).

[0009] Furthermore, the volume of the collection box needs to be designed and selected based on the unit time flow rate of the anolyte in the electrolytic cell and the preset intermittent discharge frequency to ensure that it can effectively accommodate the overflowing anolyte during the discharge interval, avoid overflowing the box, and ensure a reasonable discharge frequency.

[0010] Compared with the prior art, the electrolytic cell anolyte flow interruption device provided by this utility model has the following advantages: 1. Significant energy saving effect: By intermittent automatic discharge, the continuous liquid flow of anolyte between the chute and the trough is periodically interrupted, and the conductive bridge is completely destroyed. This can greatly reduce or even eliminate the current bypass loss caused by this, and directly reduce the DC power consumption of the electrolysis process. The energy saving effect is direct and significant.

[0011] 2. High degree of automation and reliable operation: The liquid level detection unit automatically senses the liquid level and controls the electronically controlled flow cut-off unit (or through the controller) to achieve fully automatic operation without manual intervention. It has a rapid response, accurate control, and reliable operation, effectively reducing the labor intensity of operators.

[0012] 3. Simple structure, low modification cost, and easy implementation: The device has a simple structure, consisting of only a few components such as a collection tank, a level gauge, and a solenoid valve. It is easy to add and modify the existing anolyte sluice system of the electrolytic cell without making large-scale changes to the main body of the electrolytic cell. It is easy to install and maintain, and is particularly suitable for promotion and application as an energy-saving technology transformation project with a short investment recovery period.

[0013] 4. Wide applicability: Its principle is based on interrupting continuous liquid flow, so it can not only be used in the production of electrolytic manganese, but also in other wet electrolytic metallurgical processes that have problems such as continuous overflow of anolyte and current bypass, such as electrolytic zinc, electrolytic copper, and electrolytic cobalt, with broad application prospects. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a front view of an embodiment of the present utility model; Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0015] The following are the labels in the diagram: 1. Anode liquid chute; 2. Liquid level gauge (liquid level detection unit); 3. Collection tank; 4. Solenoid valve (electrically controlled flow cut-off unit); 5. Drain port; 6. Electrolytic cell; 7. Anode liquid chute. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] In a preferred embodiment of this utility model, such as Figures 1 to 3 As shown, the electrolytic cell anolyte shut-off device mainly consists of a collection tank 3, a level gauge 2 (as a level detection unit), and a solenoid valve 4 (as an electrically controlled shut-off unit).

[0018] During installation, the collection tank 3 is fixedly installed on the side of the electrolytic cell 6, ensuring it is directly below the anolyte chute 7. The inlet end of the anolyte chute 1 is securely connected to the anolyte chute 7, and its outlet end extends downward and inserts into the upper opening of the collection tank 3, ensuring that all overflowing anolyte flows into the collection tank 3. A drain port 5 is welded or flanged to the bottom of the collection tank 3, and the accumulated liquid is led out through a pipe. A normally closed solenoid valve 4 is connected in series on this pipe. A float-type level switch (i.e., level gauge 2) is installed on the upper side wall of the collection tank 3, and its high and low position can be adjusted according to the required level control point. The output signal line of the level gauge 2 is directly connected to the power control terminal of the solenoid valve 4 (or connected to an intermediate relay to control the solenoid valve).

[0019] The working process is as follows: Anode liquid overflows from the anolyte outlet 7 of the electrolytic cell 6 and flows into the collection tank 3 for temporary storage via the anolyte chute 1. At this time, the solenoid valve 4 is in the closed state. As the liquid level rises, when the liquid level reaches the high point set by the level gauge 2, the level gauge 2 activates, outputting a switching signal to trigger the solenoid valve 4 to open, and the accumulated liquid in the collection tank 3 is quickly discharged through the drain port 5. The liquid level then drops, and when the liquid level drops to the low point set by the level gauge 2 (or after a certain opening time is set by a time delay relay), the level gauge 2 resets (or the time delay expires), the solenoid valve 4 is de-energized and closed, stopping the discharge. Afterward, the collection tank 3 begins to accumulate liquid again, and this cycle repeats, realizing the intermittent automatic discharge of anolyte, always maintaining a discontinuous liquid flow state between the outlet and the chute most of the time, thereby effectively cutting off the current bypass.

[0020] The volume V of the collection box 3 can be initially estimated according to the formula V = Q × t, where Q is the overflow rate of the anolyte per unit time and t is the set discharge interval time (i.e., the time between two openings of the solenoid valve). A certain safety margin can be considered when selecting the actual volume.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for cutting off the flow of anolyte in an electrolytic cell, characterized in that, include: The collection tank (3), liquid level detection unit, and electrically controlled flow interruption unit are provided. The collection tank (3) is located below the anolyte chute (7) of the electrolytic cell (6), and the bottom of the collection tank (3) is provided with a drain port (5). The inlet end of the anolyte chute (1) is connected to the anolyte chute (7), and its outlet end extends to the internal cavity of the collection tank (3). The electrically controlled flow interruption unit is installed on the flow path of the drain port (5). The liquid level detection unit is installed on the collection tank (3), and its signal output end is communicatively connected to the control end of the electrically controlled flow interruption unit.

2. The electrolytic cell anolyte flow interruption device according to claim 1, characterized in that, The liquid level detection unit is a float-type liquid level switch or a capacitive liquid level sensor (2).

3. The electrolytic cell anolyte flow interruption device according to claim 1, characterized in that, The electrically controlled flow interruption unit is a solenoid valve (4).

4. The electrolytic cell anolyte flow interruption device according to claim 1, characterized in that, It also includes a controller, the signal output terminal of the liquid level detection unit is connected to the input terminal of the controller, and the output terminal of the controller is connected to the electrically controlled flow interruption unit.

5. The electrolytic cell anolyte flow interruption device according to any one of claims 1 to 4, characterized in that, The volume of the collection box (3) is determined based on the unit time flow rate of the anolyte in the electrolytic cell and the set discharge interval.

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