Shunting device for aluminum electrolysis cell

Abstract

The utility model discloses a shunting device for an aluminum electrolysis cell, which comprises a movable shunt adjusting unit, a movable switch and protection unit and a connecting unit, and the movable shunt adjusting unit and the movable switch and protection unit are connected in series through the connecting unit. And the connecting unit is connected to a bus power inlet point and a bus power outlet point at a flue end or an aluminum outlet end of the electrolytic cell, so that the electrolytic cell is connected with the shunting device in parallel. The device is suitable for a diseased cell in the production process of an electrolysis system, and solves the problem that when the diseased cell occurs in the electrolysis system, the shunt device is used for reducing the running current of a single cell and reducing the heat input and magnetic field disturbance of the diseased cell under the condition that the current of the system is not reduced, so that the problem of the diseased cell is quickly solved or relieved; the safety risk of a single tank and a system is reduced, and the economic loss is reduced to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum electrolysis equipment, and in particular to a diversion device for aluminum electrolysis cells. Background Technology

[0002] There are multiple physical fields inside and around the aluminum electrolysis cell. These physical fields can be independent or derived from other fields, including current field, magnetic field, thermal field, melt flow field and stress field.

[0003] The current field refers to the distribution of current and voltage within an electrolytic cell. It is the energy basis for the operation of the electrolytic cell and the root cause of other physical fields. Current generates a magnetic field, and its thermal effect (Joule heating) produces a thermal field. The imbalance in the magnetic field distribution is the primary cause of the movement of the electrolyte and molten aluminum, thus forming the melt flow field. Multiple physical fields are generated, act, evolve, and interact within the electrolytic cell, directly affecting the energy consumption, efficiency, cell life, and other economic and technical indicators of aluminum electrolysis production.

[0004] In the production process of aluminum electrolysis cells, stable, efficient, and sustained cell conditions are the goals pursued by electrolysis producers. However, process conditions can deviate from the normal range, resulting in abnormal cell conditions. When one or more important process conditions significantly deviate from the normal range, especially when the two essential conditions for the normal operation of the electrolysis cell—thermal balance and material balance—are severely disrupted, the technical and economic indicators of the electrolysis cell will deteriorate significantly, and it is considered a defective cell. Common abnormalities include high noise / voltage fluctuations, high temperature (cell temperature exceeding 990℃), and aluminum rolling. In addition, defects caused by lining damage may also occur during production. These defective cells, especially high-temperature cells, aluminum rolling cells, and damaged cells, are difficult to handle. If not handled promptly, they can easily lead to single-cell accidents and even endanger the safe production of the entire system. On the other hand, prematurely shutting down defective cells to reduce the safety risks to the system will directly lead to major overhauls of the electrolysis cell, increasing the number of cells requiring overhaul each year and resulting in significant economic losses.

[0005] If electrolysis producers want to reduce the safety risks of individual cells and the system, while extending the life of damaged cells or quickly resolving problems, they can reduce the system's operating current, thereby reducing heat input and magnetic field disturbances in damaged cells. This is beneficial for the rapid recovery of damaged cells and the mitigation of problems. However, reducing the system current will have a significant adverse impact on maintaining the thermal balance of other electrolysis cells in the system.

[0006] How to reduce the operating current of the faulty tank to make the problem relatively simple, without affecting the operation of the system current, has become a technical challenge in dealing with faulty tanks. Utility Model Content

[0007] To solve the above-mentioned technical problems, this utility model designs a current shunt device for aluminum electrolysis cells, which is connected to the power inlet and outlet points of the busbar of the defective cell. The current shunt device and the cell form a parallel circuit, shunting 0~15% of the current. This reduces the operating current of a single cell without affecting the system current, thereby quickly solving or alleviating the problem of the defective cell, minimizing economic losses, and significantly reducing the risks of single cell and system electrolysis cells.

[0008] The present invention adopts the following technical solution:

[0009] A diversion device for an aluminum electrolytic cell includes a movable diversion adjustment unit, a movable switch and protection unit, and a connection unit. The movable diversion adjustment unit, the movable switch and protection unit are connected in series through the connection unit and connected to the bus inlet and outlet points of the flue end or aluminum outlet end of the electrolytic cell through the connection unit, so that the electrolytic cell and the diversion device are connected in parallel.

[0010] The movable shunt adjustment unit includes a movable steel frame, a cooling fan, and an adjustable resistance circuit system. The cooling fan and the adjustable resistance circuit system are fixed to the movable steel frame. The adjustable resistance circuit system consists of multiple parallel resistors.

[0011] The switch and protection unit includes a movable steel structure frame 2, a circuit switch system and a protection system. The circuit switch system and the protection system are fixed on the movable steel structure frame 2. The circuit switch system can realize the connection and disconnection of the current shunt device, and the protection system can realize the disconnection of the current shunt device when it is overcurrent, thus forming protection.

[0012] Preferably, the connection unit consists of copper cables and connector copper plates.

[0013] Preferably, the multiple parallel resistors are connected and disconnected by a contact switch, and the current is divided to different degrees by the number of resistors connected.

[0014] Preferably, the cooling fan and the circuit system with adjustable resistance are insulated from the movable steel frame.

[0015] Preferably, the circuit switching system and protection system are insulated from the movable steel structure frame.

[0016] Preferably, the power inlet and outlet points of the busbars at the flue end or aluminum outlet end of the connecting unit and the electrolytic cell are connected by bolts or clamps.

[0017] Preferably, the cooling fan is positioned below the circuit system with adjustable resistance, and the outlet of the cooling fan is directed towards the circuit system with adjustable resistance.

[0018] Preferably, the movable steel frame one and the movable steel frame two are each composed of a steel frame and rollers rotatably connected to the bottom.

[0019] The beneficial effects of this utility model are: This utility model is applicable to defective cells that occur during the production process of an electrolysis system. It solves the problem of reducing the operating current of a single cell by using a shunt device when a defective cell occurs in the electrolysis system, without reducing the system current. This reduces the heat input and magnetic field disturbance of the defective cell, thereby quickly resolving or alleviating the problem, reducing the safety risks of a single cell and the system, and minimizing economic losses. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention in use;

[0021] Figure 2 This is a front view of the present invention in use;

[0022] Figure 3 This is a schematic diagram of a movable shunt adjustment unit in this utility model;

[0023] Figure 4 This is a schematic diagram of a movable switch and protection unit in this utility model;

[0024] In the diagram: 1. Movable shunt adjustment unit; 2. Movable switch and protection unit; 3. Connection unit; 4. Electrolytic cell requiring shunt; 5. Adjacent electrolytic cell; 11. Movable steel frame one; 12. Resistor; 13. Cooling fan; 21. Movable steel frame two; 22. Circuit switching system; 23. Protection system. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0026] Example: Figure 1 and Figure 2As shown, a current-diverting device for aluminum electrolysis cells includes a movable current-diverter adjustment unit 1, a movable switch and protection unit 2, and a connection unit 3. When an electrolysis cell (target cell) needs to reduce its operating current due to problems or other reasons, current diversion is required. 4. When installing the current-diverting device, one end of the connection unit is crimped to the busbar inlet point of the flue or aluminum outlet end of the electrolysis cell requiring current diversion, and the other end is connected to the movable current-diverter adjustment unit. The other end of the movable current-diverter adjustment unit is connected to the movable switch and protection unit, and the other end of the movable switch and protection unit is connected to the connection unit. The other end of the connection unit is crimped to the outlet point of the electrolysis cell requiring current diversion (the busbar inlet point of the flue or aluminum outlet end of the adjacent electrolysis cell 5). After the entire system is connected and checked for abnormalities, the circuit can be connected for current diversion operations. This embodiment is applicable to the aluminum outlet end and / or flue end of the first-floor platform in the production electrolysis workshop. After the current-diverting device is installed, it is connected in parallel with the target cell. Each cell can be connected to a diversion device at the flue end or aluminum outlet end of the electrolytic cell, depending on the condition of the electrolytic cell, or a diversion device can be connected at both the flue end and the aluminum outlet end.

[0027] like Figure 3 As shown, the movable shunt adjustment unit includes a movable steel frame 11, a cooling fan 13, and an adjustable resistance circuit system. The cooling fan and the adjustable resistance circuit system are fixed to the movable steel frame 11 and are insulated from it. The cooling fan is positioned below the adjustable resistance circuit system, and its outlet is directed towards it. The adjustable resistance circuit system consists of multiple parallel resistors 12. These parallel resistors are connected and disconnected via contact switches, allowing for different degrees of current shunting depending on the number of resistors connected.

[0028] like Figure 4 As shown, the switch and protection unit includes a movable steel frame 21, a circuit switch system 22, and a protection system 23. The circuit switch system and the protection system are fixed to the movable steel frame 2, and are insulated from each other. The circuit switch system can connect and disconnect the shunt device, and the protection system can disconnect the shunt device when it experiences overcurrent, thus providing protection.

[0029] The connecting unit consists of copper cables and connector copper plates. Movable steel frame one and movable steel frame two each consist of a steel frame and rollers rotatably connected at the bottom.

[0030] This invention is applicable to defective cells that occur during the production process of an electrolysis system. It solves the problem of reducing the operating current of a single cell without reducing the system current when a defective cell occurs. This is achieved by using a current shunt device to reduce the heat input and magnetic field disturbance of the defective cell, thereby quickly resolving or alleviating the problem, reducing the safety risks of a single cell and the system, and minimizing economic losses.

[0031] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A diversion device for an aluminum electrolytic cell, characterized in that, The diversion device includes a movable diversion adjustment unit, a movable switch and protection unit, and a connection unit. The movable diversion adjustment unit, the movable switch and protection unit are connected in series through the connection unit and connected to the bus inlet and outlet points of the electrolytic cell flue or aluminum outlet through the connection unit, so that the electrolytic cell and the diversion device are connected in parallel. The movable shunt adjustment unit includes a movable steel frame, a cooling fan, and an adjustable resistance circuit system. The cooling fan and the adjustable resistance circuit system are fixed to the movable steel frame. The adjustable resistance circuit system consists of multiple parallel resistors. The switch and protection unit includes a movable steel structure frame 2, a circuit switch system and a protection system. The circuit switch system and the protection system are fixed on the movable steel structure frame 2. The circuit switch system can realize the connection and disconnection of the current shunt device, and the protection system can realize the disconnection of the current shunt device when it is overcurrent, thus forming protection.

2. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The connection unit consists of copper cables and connector copper plates.

3. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The multiple parallel resistors are connected and disconnected via a contact switch, and the current is divided to different degrees by the number of resistors connected.

4. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The cooling fan and the circuitry with adjustable resistance are insulated from the movable steel frame.

5. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The circuit switching system and protection system are insulated from the movable steel structure frame.

6. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The connection unit and the busbar power inlet and outlet points of the electrolytic cell flue end or aluminum outlet end are connected by bolts or clamps.

7. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The cooling fan is positioned below the adjustable resistance circuit system, and the cooling fan outlet is directed towards the adjustable resistance circuit system.

8. The diversion device for aluminum electrolysis cells according to claim 1, characterized in that, The movable steel frame one and movable steel frame two are each composed of a steel frame and rollers rotatably connected at the bottom.

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