Shunting device for aluminum electrolysis cell

Abstract

The invention 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, under the condition that the system current is not reduced, 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, 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] The present invention relates to the technical field of aluminum electrolysis equipment, and in particular to a diversion device for an aluminum electrolytic cell. Background Art

[0002] There are multiple physical fields in and around the aluminum reduction 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 in the electrolytic cell. It is the energy basis for the operation of the electrolytic cell and the root of the formation of other physical fields. The current generates a magnetic field, and its thermal effect (Joule heat) generates a thermal field. The imbalance of the magnetic field distribution is the main reason for the movement of electrolyte and aluminum liquid, that is, the formation of the melt flow field. Multiple physical fields are generated, acted, evolved and interacted in the electrolytic cell, which directly affects the economic and technical indicators of aluminum electrolysis production, such as energy consumption, efficiency, and cell life.

[0004] In the production process of aluminum electrolytic cells, stable, efficient and long-lasting cell conditions are the goals pursued by electrolytic producers, but process conditions may deviate from the normal range, that is, the cell conditions are abnormal. When one or some important process technical conditions deviate significantly from the normal range, especially when the two major conditions for the normal operation of the electrolytic cell - thermal balance and material balance - are seriously damaged, the technical and economic indicators of the electrolytic cell will deteriorate seriously, and it will be regarded as a sick cell, such as common high noise / voltage swing, high temperature (cell temperature exceeds 990℃), aluminum rolling and other abnormal conditions. In addition, sick cells that cause a series of problems due to damaged linings will also be encountered in production. These sick cells, especially high-temperature cells, aluminum rolling cells and damaged cells, are difficult to handle. If they are not handled in time, they are easy to cause single cell accidents and even endanger the safe production of the system. If the sick cells are shut down prematurely in order to reduce the safety risks of the sick cells to the system, it will directly lead to the shutdown of the electrolytic cells for overhaul. The number of overhauled cells increases each year, which will also cause greater economic losses.

[0005] If the electrolytic producer wants to reduce the safety risks of a single cell and the system while extending the life of a defective cell or quickly solving the problems encountered, the operating current of the system can be reduced, reducing the heat input and magnetic field disturbance of the defective cell, which is conducive to the rapid recovery of the defective cell and the alleviation of the problem. However, the reduction of the system current will have a greater adverse effect on the thermal balance maintenance of other electrolytic cells in the system.

[0006] How to reduce the operating current of the defective slot to make the problem relatively simple to deal with while not affecting the operation of the system current has become a technical difficulty in dealing with defective slots. Summary of the invention

[0007] In order to solve the above technical problems, the present invention designs a shunt device for aluminum electrolytic cells, which is connected to the power inlet and outlet points of the busbar of the defective cell. The shunt device and the cell form a parallel circuit, which shunts 0-15%, thereby reducing the operating current of a single cell without affecting the system current, so that the problem of the defective cell can be quickly solved or alleviated, the economic loss can be minimized, and the risks of the single cell and the system electrolytic cell can be greatly reduced.

[0008] The present invention adopts the following technical solution: A shunt device for an aluminum electrolytic cell, comprising a movable shunt regulating unit, a movable switch and protection unit and a connecting unit, wherein the movable shunt regulating unit, the movable switch and protection unit are connected in series through the connecting unit, and are connected to a busbar power inlet point and a busbar power outlet point at a flue end or an aluminum outlet end of the electrolytic cell through the connecting unit, so that the electrolytic cell and the shunt device are connected in parallel; The movable shunt adjustment unit comprises a movable steel structure frame 1, a cooling fan and a circuit system with adjustable resistance value, the cooling fan and the circuit system with adjustable resistance value are fixed on the movable steel structure frame 1, and the circuit system with adjustable resistance value is composed 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 shunt device, and the protection system can realize the disconnection of the shunt device when overcurrent occurs, thereby forming protection.

[0009] Preferably, the connection unit consists of a copper cable and a connector copper plate.

[0010] Preferably, the multi-channel parallel resistors realize the connection and disconnection of any channel of the parallel resistors through a contact switch, and realize different degrees of current diversion according to the number of connected resistors.

[0011] Preferably, the cooling fan and the circuit system with adjustable resistance value are insulated from the movable steel structure frame.

[0012] Preferably, the circuit switch system and the protection system are insulated from the movable steel structure frame.

[0013] Preferably, the connection unit and the busbar power inlet and outlet points at the flue end or the aluminum outlet end of the electrolytic cell are connected by bolts or crimped by clamps.

[0014] Preferably, the cooling fan is arranged below the circuit system with adjustable resistance value, and the outlet of the cooling fan is directed to the circuit system with adjustable resistance value.

[0015] Preferably, the movable steel structure frame 1 and the movable steel structure frame 2 are respectively composed of a steel structure frame and rollers rotatably connected to the bottom.

[0016] The beneficial effects of the present invention are as follows: the present invention is applicable to defective cells appearing in the production process of an electrolysis system, and solves the problem that when a defective cell appears in the electrolysis system, the operating current of a single cell is reduced by a shunt device without reducing the system current, thereby reducing the heat input and magnetic field disturbance of the defective cell, so that the problem of the defective cell can be quickly solved or alleviated, reducing the safety risks of the single cell and the system, and minimizing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram when the present invention is used; Figure 2 It is a front view when the present invention is used; Figure 3 It is a structural schematic diagram of a movable diverter adjustment unit in the present invention; Figure 4 It is a structural schematic diagram of a movable switch and protection unit in the present invention; In the figure: 1. movable shunt adjustment unit, 2. movable switch and protection unit, 3. connection unit, 4. electrolytic cell to be shunted, 5. adjacent electrolytic cells, 11. movable steel structure frame 1, 12. resistor, 13. cooling fan, 21. movable steel structure frame 2, 22. circuit switch system, 23. protection system. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example: Figure 1 and Figure 2As shown, a shunt device for aluminum electrolytic cells includes a movable shunt adjustment unit 1, a movable switch and protection unit 2 and a connection unit 3. When the electrolytic cell (target cell) needs to reduce the operating current due to a sick cell or other reasons, that is, the electrolytic cell (target cell) needs to be shunt, 4, when the shunt device is installed, one end of the connection unit is connected to the busbar power inlet point of the flue end or the aluminum outlet end of the electrolytic cell to be shunt by crimping, and the other end is connected to the movable shunt adjustment unit, and the other end of the movable shunt 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, and the other end of the connection unit is connected to the power outlet point of the cell to be decomposed (the busbar power inlet point of the flue end or the aluminum outlet end of the adjacent electrolytic cell 5) by crimping. After the entire system is connected, check that there is no abnormality, and then the circuit can be connected for shunt operation. This embodiment is applicable to the aluminum outlet end or / and the flue end of the first platform of the production electrolysis workshop. After the shunt device is installed, it is in parallel with the target cell. Each cell can be connected to a set of diverter devices at the flue end or the aluminum outlet end of the electrolytic cell according to the conditions of the electrolytic cell, or a set of diverter devices can be connected to the flue end and the aluminum outlet end respectively.

[0019] like Figure 3 As shown, the movable shunt adjustment unit includes a movable steel structure frame 11, a cooling fan 13 and a circuit system with adjustable resistance value, the cooling fan and the circuit system with adjustable resistance value are fixed on the movable steel structure frame 1, the cooling fan and the circuit system with adjustable resistance value are insulated from the movable steel structure frame, the cooling fan is arranged below the circuit system with adjustable resistance value, and the outlet of the cooling fan is directed to the circuit system with adjustable resistance value. The circuit system with adjustable resistance value is composed of multiple parallel resistors 12; the multiple parallel resistors realize the connection and disconnection of any parallel resistor through contact switches, and realize different degrees of current shunting through the number of resistors connected.

[0020] like Figure 4 As shown, the switch and protection unit includes a movable steel structure frame 21, a circuit switch system 22 and a protection system 23. The circuit switch system and the protection system are fixed on the movable steel structure frame 2, and the circuit switch system and the protection system are insulated from the movable steel structure frame 2. The circuit switch system can realize the connection and disconnection of the shunt device, and the protection system can realize the disconnection of the shunt device when overcurrent occurs, thereby forming protection.

[0021] The connection unit is composed of a copper cable and a joint copper plate. The movable steel structure frame 1 and the movable steel structure frame 2 are respectively composed of a steel structure frame and a roller connected by rotation at the bottom.

[0022] The present invention is applicable to a defective cell appearing in the production process of an electrolysis system, and solves the problem that when a defective cell appears in the electrolysis system, the operating current of a single cell can be reduced by a shunt device without reducing the system current, thereby reducing the heat input and magnetic field disturbance of the defective cell, so that the problem of the defective cell can be quickly solved or alleviated, reducing the safety risks of the single cell and the system, and minimizing the economic loss.

[0023] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A flow divider for an aluminum electrolytic cell, characterized in that: The shunt device includes a movable shunt adjustment unit, a movable switch and protection unit and a connection unit. The movable shunt adjustment unit, the movable switch and protection unit are connected in series through the connection unit, and are connected to the busbar power inlet and power outlet points at the flue end or the aluminum outlet end of the electrolytic cell through the connection unit, so that the electrolytic cell and the shunt device are connected in parallel; The movable shunt adjustment unit comprises a movable steel structure frame 1, a cooling fan and a circuit system with adjustable resistance value, the cooling fan and the circuit system with adjustable resistance value are fixed on the movable steel structure frame 1, and the circuit system with adjustable resistance value is composed 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 shunt device, and the protection system can realize the disconnection of the shunt device when overcurrent occurs, thereby forming protection.

2. The flow divider for an aluminum electrolytic cell according to claim 1, characterized in that: The connection unit is composed of a copper cable and a joint copper plate.

3. The flow divider for an aluminum electrolytic cell according to claim 1, wherein: The multi-channel parallel resistors can realize the connection and disconnection of any channel of the parallel resistors through the contact switch, and realize current splitting to different degrees according to the number of connected resistors.

4. The splitter device for aluminum electrolysis cell according to claim 1, characterized in that: The cooling fan and the circuit system with adjustable resistance value are insulated from the movable steel structure frame.

5. The splitter device for aluminum electrolysis cell according to claim 1, characterized in that: The circuit switch system and the protection system are insulated from the movable steel structure frame.

6. The flow divider for an aluminum electrolytic cell according to claim 1, characterized in that: The connection unit and the busbar power inlet and power outlet points at the flue end or the aluminum outlet end of the electrolytic cell are connected by bolts or clamps.

7. The flow divider for an aluminum electrolytic cell according to claim 1, characterized in that: The cooling fan is arranged below the circuit system with adjustable resistance value, and the outlet of the cooling fan is directed to the circuit system with adjustable resistance value.

8. The flow divider for an aluminum electrolytic cell according to claim 1, wherein: The movable steel structure frame 1 and the movable steel structure frame 2 are respectively composed of a steel structure frame and rollers rotatably connected at the bottom.

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