Electrolysis series provided with double-source electricity-feeding aluminum electrolysis cell adaptive to flexible production

Abstract

The utility model discloses a double-source electricity-feeding aluminum electrolysis series adaptive to flexible production, which comprises an aluminum electrolysis cell body, and a forward electricity-feeding conventional upright post bus and a reverse electricity-feeding upright post bus are respectively arranged on the upstream and the downstream of the aluminum electrolysis cell body. And the reverse power-in upright post bus and the forward power-in conventional upright post bus are both connected with an anode large bus on the aluminum electrolysis cell body. The double-source electricity-feeding aluminum electrolysis cell has the double-power-supply electricity-feeding capacity, can receive direct current from the upstream side and the downstream side at the same time, and after the current is homogenized through the large anode bus, the current is led into the aluminum electrolysis cell for electrolysis production. The number of the reverse electricity-feeding columns is flexibly configured according to the magnitude of the reverse current and is not related to the number of the forward electricity-feeding columns, so that the adaptability and flexibility of the system are enhanced. The problem of rigid structure caused by single-side power supply of the existing aluminum electrolysis cell is solved. Flexible and efficient current distribution of the electrolytic cell is achieved, access of green energy is supported, and powerful support is provided for flexible production and green transformation of the aluminum electrolysis industry.

Description

Technical Field

[0001] The utility model relates to an electrolysis series provided with a double-source power supply aluminum electrolytic cell adapted for flexible production, belonging to the technical field of aluminum electrolysis. Background Art

[0002] In traditional aluminum electrolysis systems, rectifiers provide DC current to the electrolytic cells via a busbar system. All electrolytic cells are typically connected in series along the same current path, with the current flowing in the same direction. However, with the rapid development of the aluminum electrolysis industry, the demand for flexible production and green power access is increasing. Traditional busbar systems struggle to meet these demands, especially when connecting to different power sources. Summary of the Invention

[0003] The purpose of this utility model is to provide an electrolysis system equipped with dual-source aluminum reduction cells adapted for flexible production. The dual-source aluminum reduction cells in this electrolysis system are capable of receiving DC current simultaneously on both the upstream and downstream sides. Specifically, this utility model utilizes a unique design of dual-source aluminum reduction cells that can be flexibly deployed within the electrolysis system to meet the current requirements of various production scenarios.

[0004] The technical solution of the present invention is as follows: an electrolysis series is provided with dual-source power aluminum electrolytic cells adapted for flexible production, the electrolysis series includes a plurality of electrolytic cells connected in series, at least one of which is a dual-source power aluminum electrolytic cell, the dual-source power aluminum electrolytic cell includes an aluminum electrolytic cell body, a forward power conventional column busbar and a reverse power column busbar are respectively provided upstream and downstream of the aluminum electrolytic cell body, the reverse power column busbar and the forward power conventional column busbar are both connected to the anode large busbar on the aluminum electrolytic cell body, a slot busbar is provided around the bottom of the aluminum electrolytic cell body, the slot busbar of the dual-source power aluminum electrolytic cell is connected to the power column busbar of the next electrolytic cell, and also includes at least two power supplies, one of which is a normal power supply rectifier, and the other is a reverse DC power supply, and the reverse DC power supply is connected by the reverse power column busbar of the dual-source power aluminum electrolytic cell.

[0005] In the aforementioned electrolytic series equipped with dual-source power supply aluminum electrolytic cells adapted for flexible production, the electrolytic cells are evenly divided into two columns, and the reverse DC power supply and the normal power supply rectifier are respectively arranged at the two ends of the two columns of electrolytic cells, wherein the positive and negative poles of the normal power supply rectifier are respectively connected to the two columns of electrolytic cells closest to them.

[0006] In the aforementioned electrolysis series equipped with dual-source power supply aluminum electrolytic cells adapted for flexible production, multiple reverse DC power supplies may be provided, and each reverse DC power supply is connected to a corresponding dual-source power supply aluminum electrolytic cell.

[0007] In the aforementioned electrolysis series equipped with dual-source power supply aluminum electrolytic cells adapted for flexible production, the reverse DC power supply is a power supply rectifier device or green electricity.

[0008] In the aforementioned electrolysis series equipped with dual-source power supply aluminum electrolytic cells adapted for flexible production, a dual-source power supply aluminum electrolytic cell is provided with a plurality of reverse power supply column busbars.

[0009] Beneficial effects of the present invention: Compared with the prior art, the electrolysis series of the present invention does not change the working direction of the original series current after being provided with a dual-source power supply aluminum electrolytic cell. However, starting from the dual-source power supply aluminum electrolytic cell, the production current of subsequent electrolytic cells increases by ΔI, that is, the current of the reverse DC power supply.

[0010] Although this invention increases the cost to a certain extent, it has the following advantages compared with directly connecting the reverse current to the aisle DC busbar:

[0011] 1) Relatively flexible. Because direct connection to the busbar can only be done in the corridor or at the end of the workshop, unlike the present invention which can be implemented at any location in the workshop;

[0012] 2) Excellent current sharing. The workshop's DC busbar is a multi-piece structure, which creates current sharing issues wherever it is connected, potentially affecting the local cell magnetic field. However, with the dual-source electrolytic cell of the present invention, the current and magnetic field of the downstream electrolytic cell are almost proportionally amplified, generally without requiring changes to the busbar design.

[0013] In summary, the electrolysis series of this utility model, by incorporating dual-source power inlet into the aluminum electrolytic cell, possesses dual power supply capability, capable of simultaneously receiving DC current from both upstream and downstream sides. After equalizing the current through the anode busbar, it is introduced into the aluminum electrolytic cell for electrolytic production. The number of reverse power inlet columns can be flexibly configured according to the reverse current level, regardless of the number of forward power inlet columns, enhancing the system's adaptability and flexibility.

[0014] Through the double-sided power inlet design and the flexible configuration of the reverse power inlet columns, the flexibility and efficiency of the electrolytic cell current distribution are achieved, while supporting the access of green energy, providing strong support for the flexible production and green transformation of the aluminum electrolysis industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the aluminum electrolytic cell with dual power supply to adapt to flexible production;

[0016] Figure 2 This is a schematic diagram of the electrolysis series structure of an aluminum electrolytic cell equipped with dual-source power supply adapted for flexible production.

[0017] Figure markings: 1-reverse power supply column busbar, 2-forward power supply conventional column busbar, 3-aluminum electrolytic cell body, 4-anode large busbar, 5-tank busbar, 6-dual source power supply aluminum electrolytic cell, 7-normal power supply rectifier, 8-reverse DC power supply. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0019] Embodiment 1 of the present invention: An electrolysis series is provided with a dual-source power supply aluminum electrolytic cell adapted for flexible production, the electrolysis series includes a plurality of electrolytic cells connected in series, at least one of which is a dual-source power supply aluminum electrolytic cell 6. The dual-source power supply aluminum electrolytic cell 6 includes an aluminum electrolytic cell body 3, and the upstream and downstream of the aluminum electrolytic cell body 3 are respectively provided with a forward power supply conventional column busbar 2 and a reverse power supply column busbar 1. The reverse power supply column busbar 1 and the forward power supply conventional column busbar 2 are both connected to the anode large busbar 4 on the aluminum electrolytic cell body 3. A slot busbar 5 is provided around the bottom of the aluminum electrolytic cell body 3. The slot busbar 5 of the dual-source power supply aluminum electrolytic cell 6 is connected to the power supply column busbar of the next electrolytic cell. It also includes at least two power supplies, one of which is a normal power supply rectifier 7, and the normal power supply rectifier 7 can be connected to the electrolytic cells of the electrolysis series according to the existing conventional method. The other is a reverse DC power supply 8. The positive output end of the reverse DC power supply 8 is connected to the reverse power supply column busbar 1 of the dual-source power supply aluminum electrolytic cell 6, and its negative input end can be connected to any position of the electrolytic cell behind the dual-source power supply aluminum electrolytic cell 6.

[0020] The electrolytic cells are evenly divided into two rows, with the reverse DC power supply 8 and the normal power supply rectifier 7 respectively arranged at the two ends of the two rows of electrolytic cells, wherein the positive and negative poles of the normal power supply rectifier 7 are respectively connected to the two electrolytic cells closest to it in the two rows. If the entire electrolytic series is provided with 300 electrolytic cells, each row is provided with 150 electrolytic cells, and each row is numbered sequentially, with the first row being 1#-150# and the second row being 151#-300#, with the second row being numbered in reverse. Of the two rows of electrolytic cells, the ones closest to the normal power supply rectifier 7 are electrolytic cells 1# and 300#. The positive pole of the normal power supply rectifier 7 can be connected to electrolytic cell 1#, while the nearby one is connected to electrolytic cell 300#, for convenient wiring.

[0021] The reverse DC power supply 8 and the normal power supply rectifier 7 are respectively arranged at the two ends of the electrolysis series, which is convenient for management and wiring.

[0022] There may be multiple reverse DC power supplies 8 , and each reverse DC power supply 8 is connected to a corresponding dual-source power supply aluminum electrolytic cell 6 .

[0023] In the scenario where multiple reverse DC power supplies 8 exist, a nested superposition method is used to calculate the current size, and the superimposed external current is regarded as part of the series production current. On this basis, a new dual-source power supply aluminum electrolytic cell 6 is added to achieve the equalized superposition of the new reverse DC power supply 8 and the original series current.

[0024] Each dual-source power supply aluminum electrolytic cell 6 is provided with multiple reverse power supply column busbars 1. The number of reverse power supply column busbars 1 is independently determined according to the current of the connected reverse DC power supply and has no direct correlation with the number of forward power supply column busbars 2. The design current density of the reverse power supply column busbar 1 should be: 0.3 A / cm² ~ 0.5 A / cm².

[0025] The present invention adds one or more dual-source aluminum electrolytic cells 6 adapted for flexible production to the normal production series. These dual-source aluminum electrolytic cells 6 have dual-side power supply capabilities, allowing them to receive DC current simultaneously from both upstream and downstream sides. A forward power supply column busbar 2 is provided on the upstream side, and a reverse power supply column busbar 1 is provided on the downstream side, connected to the anode busbars 4 on the A and B sides, respectively. After current equalization on the anode busbars 4, the current is conducted down through the cell's internal conductors into the aluminum electrolytic cell body 3 for electrolytic production. It is then conducted through the cathode steel bars at the lower side of the cell to the cell's peripheral busbars 5, and then to the power supply column busbars of the next electrolytic cell. Due to the current equalization effect of the anode busbars 4, the reverse current does not cause local current unevenness after merging with the normal series current. Instead, it continues to flow down into the aluminum electrolytic cell body 3 in the normal manner, where it not only undergoes electrolytic production but also further equalizes the current within the molten aluminum. After the current is conducted, it is still conducted through the original peripheral busbars 5 to the next electrolytic cell. For dual-source power supply aluminum reduction cell 6 and subsequent electrolytic cells, it is only necessary to calibrate the capacity of the aluminum reduction cell according to the sum of the two currents.

[0026] In order to ensure the installation of the reverse power supply column busbar 1, a net space of at least D+200 (D is the net depth and width of the power supply column) should be reserved on the downstream side of the dual-source power supply aluminum electrolytic cell 6.

[0027] The current carrying capacity and magnetic field distribution of the conductors in the electrolytic cell following the dual-source power supply aluminum electrolytic cell 6 in the electrolytic series must be designed and verified according to the maximum current, that is, the sum of the series current (the current provided by the normal power supply rectifier 7) and the reverse current (the current provided by the reverse DC power supply 8), to ensure a safe and efficient electrolytic production process.

[0028] During use, when there is no reverse DC power supply 8 input, the dual-source power supply aluminum electrolytic cell 6 can be used as a conventional aluminum electrolytic cell for normal production.

[0029] Taking a specific aluminum electrolysis system as an example, assuming the system includes 360 traditional electrolytic cells and 1 to 10 dual-source aluminum electrolytic cells 6, during busbar system modification, an independent reverse DC power supply 8 input path is set up for the dual-source aluminum electrolytic cells 6. This reverse DC power supply 8 can be a conventional power supply rectifier device or green electricity generated by green energy such as wind power and solar power through an energy storage device. Current distribution can be performed through an intelligent control system. When flexible production or green power access is required, the intelligent control system automatically adjusts the current distribution of the dual-source aluminum electrolytic cells 6 based on the production plan and green power supply, ensuring consistent current direction and uniform distribution across the entire system.

[0030] The dual-source aluminum electrolytic cell 6 of the present invention, which is adapted for flexible production, can be installed in a small number within an aluminum electrolysis plant to change the connection location of the reverse DC power supply 8. This method can be used when flexible production is required or when a large-capacity (ΔI ≥ 5% of the series current) reverse power supply is connected.

[0031] The dual-source power supply aluminum electrolytic cell 6 adapted for flexible production of the present invention mainly has the following characteristics:

[0032] Double-sided dual-source power supply design: enables simultaneous power supply to the upstream and downstream sides of the electrolyzer, improving the flexibility of current distribution.

[0033] Current equalization effect: The current equalization function of the anode busbar 4 is utilized to ensure that the reverse current is evenly distributed after merging with the normal series current, thus avoiding local current unevenness.

[0034] Green energy access: Support the access of green electricity generated by green energy such as wind power and solar energy through energy storage devices, and promote the green transformation of the aluminum electrolysis industry.

[0035] This utility model provides a novel and flexible connection structure for flexible production or green power access in aluminum electrolysis workshops. The dual-source power supply aluminum electrolysis cell (6) of this utility model has power supply column busbars on both the upstream and downstream sides, which can simultaneously receive current in both positive and negative directions, summing and balancing the currents. Therefore, it can be used in electrolysis workshops requiring flexible production or reverse power supply access. Therefore, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

[0036] It should be noted that the aforementioned reverse DC power supply 8 does not necessarily mean that its flow direction is opposite to that of the current provided by the normal power rectifier 7. It is simply because the normal power rectifier 7 and the reverse DC power supply 8 are located at opposite ends of the electrolytic cell series, hence the term reverse DC power supply or reverse current. After the reverse DC power supply 8 is connected to the dual-source aluminum electrolytic cell 6, it merges with the current provided by the normal power rectifier 7 and flows in the same direction.

Claims

1. An electrolysis series equipped with dual-source power supply aluminum electrolytic cells adapted for flexible production, characterized by: The electrolysis series includes a plurality of electrolytic cells connected in series, at least one of which is a dual-source power supply aluminum electrolytic cell (6), wherein the dual-source power supply aluminum electrolytic cell (6) includes an aluminum electrolytic cell body (3), wherein a forward power supply conventional column busbar (2) and a reverse power supply column busbar (1) are respectively provided upstream and downstream of the aluminum electrolytic cell body (3), wherein the reverse power supply column busbar (1) and the forward power supply conventional column busbar (2) are both connected to the anode large busbar (4) on the aluminum electrolytic cell body (3), and a slot busbar (5) is provided around the bottom of the aluminum electrolytic cell body (3), wherein the slot busbar (5) of the dual-source power supply aluminum electrolytic cell (6) is connected to the power supply column busbar of the next electrolytic cell, and further includes at least two power supplies, wherein one is a normal power supply rectifier (7) and the other is a reverse DC power supply (8), and the reverse DC power supply (8) is connected to the reverse power supply column busbar (1) of the dual-source power supply aluminum electrolytic cell (6).

2. The electrolysis series of claim 1, wherein the electrolysis series is provided with a dual-source power supply aluminum electrolysis cell adapted for flexible production, characterized in that: The electrolytic cells are evenly divided into two rows, and the reverse DC power supply (8) and the normal power supply rectifier (7) are respectively arranged at the two ends of the two rows of electrolytic cells, wherein the positive and negative poles of the normal power supply rectifier (7) are respectively connected to the two rows of electrolytic cells closest thereto.

3. The electrolysis series of claim 1, wherein the electrolysis series is provided with a dual-source power supply aluminum electrolysis cell adapted for flexible production, characterized in that: The reverse DC power supply (8) may be provided in plurality, and each reverse DC power supply (8) is connected to a corresponding dual-source power supply aluminum electrolytic cell (6).

4. The electrolysis series of claim 1, wherein the electrolysis series is provided with a dual-source power supply aluminum electrolysis cell adapted for flexible production, characterized in that: The reverse DC power supply (8) is a power supply rectifier or green electricity.

5. The electrolysis series provided with a dual-source power supply aluminum electrolysis cell adapted for flexible production according to claim 1, characterized in that: A dual-source power supply aluminum electrolytic cell (6) is provided with a plurality of reverse power supply column busbars (1).

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