Expansion device of two-electrolysis series rectifier unit

Abstract

The utility model discloses a capacity expansion device for a two-electrolytic series rectifier unit, which comprises a first rectifier module, a second rectifier module and an original power supply, the original power supply is electrically connected with the first rectifier module and the second rectifier module respectively, and the first rectifier module is connected with the second rectifier module in parallel. Each of the first rectification module and the second rectification module comprises an original rectification cabinet, an original transformer and an original output copper bar, the input ends of the third rectification module and the fourth rectification module are connected with the output end of the power supply, the third rectification module is connected with the first rectification module in parallel, and the fourth rectification module is connected with the second rectification module in parallel. The fourth rectifier module is connected in parallel with the second rectifier module; each of the third rectifier module and the fourth rectifier module comprises a new rectifier cabinet, a new transformer and a new output copper bar, the input end of the new rectifier cabinet is connected with the output end of the new transformer, and the output end of the new rectifier cabinet is connected with the new output copper bar. According to the utility model, the capacity of the power supply equipment is expanded with less capital cost.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal hydrometallurgical technology, and in particular to a capacity expansion device for two electrolytic series rectifier units. Background Technology

[0002] In large-scale hydrometallurgical enterprises, DC power for the electrolysis process is typically provided by rectifier transformers and rectifier units (first and second rectifier modules). However, as the enterprise grows, the number of production equipment gradually increases, and the original power supply equipment gradually approaches full load. Under such circumstances, it is very difficult to expand the power supply equipment, requiring a significant investment of funds and time to upgrade and transform the existing power supply equipment. Summary of the Invention

[0003] To address the issue of excessive costs and time associated with expanding existing power supply equipment, this invention provides a two-electrolytic series rectifier unit expansion device. This device connects a third and a fourth rectifier module in parallel to the existing equipment to expand its capacity, thereby reducing the costs and time required for companies to upgrade their power supply equipment.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A capacity expansion device for a two-electrolytic series rectifier unit includes a first rectifier module, a second rectifier module, and a primary power supply. The primary power supply is electrically connected to both the first and second rectifier modules. The first and second rectifier modules are connected in parallel. Both the first and second rectifier modules include a primary rectifier cabinet, a primary transformer, and a primary output copper busbar. The device also includes a third rectifier module, a fourth rectifier module, and a power supply. The input terminals of both the third and fourth rectifier modules are connected to the output terminals of the power supply. The third rectifier module is connected in parallel with the first rectifier module, and the fourth rectifier module is connected in parallel with the second rectifier module.

[0006] Both the third and fourth rectifier modules include a new rectifier cabinet, a new transformer, and a new output copper busbar. The input terminal of the new rectifier cabinet is connected to the output terminal of the new transformer, and the output terminal of the new rectifier cabinet is connected to the new output copper busbar.

[0007] Adding a third and fourth rectifier module facilitates the expansion of existing equipment.

[0008] Furthermore, the new rectifier cabinet includes a 6-pulse three-phase bridge rectifier cabinet.

[0009] Furthermore, the new transformer of the third rectifier module includes a 10000 / 707.5V transformer with a phase shift angle of +7.5, and the new transformer of the fourth rectifier module includes a 10000 / 707.5V transformer with a phase shift angle of -7.5. The input terminals of the new transformers of the third and fourth rectifier modules are both connected to the output terminals of the power supply to supply power to the new rectifier cabinet.

[0010] Furthermore, a first DC blade is provided between the new output copper busbar of the third rectifier module and the original output copper busbar of the first rectifier module to facilitate the parallel connection of the third rectifier module and the first rectifier module;

[0011] A second DC blade is provided between the new output copper busbar of the fourth rectifier module and the original output copper busbar of the second rectifier module to facilitate the parallel connection of the fourth rectifier module and the second rectifier module.

[0012] Furthermore, SDA DC sensors are respectively installed on the positive terminals of the new output copper busbars of the third rectifier module and the fourth rectifier module to measure the current value of the DC power.

[0013] A ZDY-N 50KA sensor is installed on the positive terminal of the new output copper busbar of the first rectifier module, and a ZDY-N 25KA sensor is installed on the positive terminal of the new output copper busbar of the second rectifier module, for measuring the current value of DC power.

[0014] The beneficial effects of this utility model are:

[0015] (1) This utility model is reasonable in terms of both implementation difficulty and capital investment. At the same time, according to the changes in tiered electricity prices, the third and fourth rectifier modules can be shut down during periods of higher electricity prices to further reduce losses.

[0016] (2) The first and second rectifier modules will generate large harmonics when they are working. The newly added third and fourth rectifier modules can cooperate with each other to form a three-phase bridge in-phase anti-parallel rectifier circuit, which reduces the harmonics of the AC input current and will not affect the original rectifier cabinet. Attached Figure Description

[0017] Figure 1 This is one of the electrical schematic diagrams of a two-electrolysis series rectifier unit expansion device provided for an embodiment of this utility model.

[0018] Figure 2 The second electrical schematic diagram of a two-electrolytic series rectifier unit expansion device provided for an embodiment of this utility model.

[0019] The numbers in the attached diagram are as follows: 1 is the first rectifier module, 2 is the second rectifier module, 3 is the original power supply, 4 is the third rectifier module, 5 is the fourth rectifier module, 6 is the power supply, 7 is the original transformer, 8 is the original output copper busbar, 9 is the new rectifier cabinet, 10 is the new transformer, 11 is the new output copper busbar, 12 is the first DC blade, 13 is the second DC blade, 14 is the original rectifier cabinet, 15 is the ZDY-N 25KA sensor, 16 is the SDA DC sensor, and 17 is the ZDY-N 50KA sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, a capacity expansion device for two electrolytic series rectifier units includes a first rectifier module 1, a second rectifier module 2, and an original power supply 3 (the first rectifier module 1, the second rectifier module 2, and the original power supply 3 are the original units). The original power supply 3 is electrically connected to both the first rectifier module 1 and the second rectifier module 2. The first rectifier module 1 and the second rectifier module 2 are connected in parallel. Both the first rectifier module 1 and the second rectifier module 2 include the original rectifier cabinet 14, the original transformer 7, and the original output copper busbar 8. The device also includes a third rectifier module 4, a fourth rectifier module 5, and a power supply 6 (the third rectifier module 4, the fourth rectifier module 5, and the power supply 6 are the newly added units). The input terminals of the third rectifier module 4 and the fourth rectifier module 5 are both connected to the output terminal of the power supply 6. The power supply 6 can be different from the power supply 6 of the first rectifier module 1 and the second rectifier module 2. The third rectifier module 4 is connected in parallel with the first rectifier module 1, and the fourth rectifier module 5 is connected in parallel with the second rectifier module 2.

[0023] Both the third rectifier module 4 and the fourth rectifier module 5 include a new rectifier cabinet 9, a new transformer 10, and a new output copper busbar 11. Specifically, the new rectifier cabinet 9 includes a 6-pulse three-phase bridge rectifier cabinet, and the two new rectifier cabinets 9 form a 12-pulse output, achieving balance. Preferably, the third rectifier module 4 and the fourth rectifier module 5 are also connected to a JM810 CNC controller for controlling the output current. The input terminal of the new rectifier cabinet 9 is connected to the output terminal of the new transformer 10. The phase shift angle of the new transformer 10 in the third rectifier module 4 is +7.5°, and the phase shift angle of the new transformer 10 in the fourth rectifier module 5 is -7.5°. The input terminal of the new transformer 10 is connected to the output terminal of the power supply 6. The power supply 6 connected to the new transformer 10 can be different from the power supply 6 connected to the original transformer 7, and its voltage level can also be different, allowing for flexibility. The output current of each is adjusted proportionally according to the ratio of the capacity of the new rectifier cabinet 9 to the capacity of the original rectifier cabinet 14, completing the capacity expansion.

[0024] The output terminal of the new rectifier cabinet 9 is connected to the new output copper busbar 11. Specifically, a first DC blade 12 is provided between the new output copper busbar 11 of the third rectifier module 4 and the original output copper busbar 8 of the first rectifier module 1. A second DC blade 13 is provided between the new output copper busbar 11 of the fourth rectifier module 5 and the original output copper busbar 8 of the second rectifier module 2.

[0025] Preferably, SDA DC sensors 16 are respectively installed on the positive terminals of the new output copper busbar 11 of the third rectifier module 4 and the new output copper busbar 11 of the fourth rectifier module 5 to measure the DC current value. A ZDY-N 50KA sensor 17 is installed on the positive terminal of the new output copper busbar 11 of the first rectifier module 1, and a ZDY-N 25KA sensor 18 is installed on the positive terminal of the new output copper busbar 11 of the second rectifier module 2 to measure the DC current value.

[0026] Preferably, since the added third rectifier module 4 and fourth rectifier module 5 do not affect the first rectifier module 1 and the second rectifier module 2, the use of the third rectifier module 4 and fourth rectifier module 5 can be flexibly selected according to specific circumstances. For example, based on changes in tiered electricity pricing, the third rectifier module 4 and fourth rectifier module 5 can be shut down during periods of higher electricity prices to reduce losses and lower production costs.

[0027] Example 2

[0028] In practical applications, a third rectifier module 4 and a fourth rectifier module 5 are selected and installed on the existing power supply equipment (first rectifier module 1 and second rectifier module 2). The input terminal of the new transformer 10 in the third rectifier module 4 is connected to the output terminal of the power supply 6. The output terminal of the new transformer 10 in the third rectifier module 4 is connected to the input terminal of the new rectifier cabinet 9 in the third rectifier module 4. The output terminal of the new rectifier cabinet 9 in the third rectifier module 4 is connected to the new output copper busbar 11 in the third rectifier module 4. The new output copper busbar 11 in the third rectifier module 4 is connected to the original output copper busbar 8 of the first rectifier module 1 through a DC blade, so that the first rectifier module 1 and the third rectifier module 4 are connected in parallel.

[0029] Connect the input terminal of the new transformer 10 in the fourth rectifier module 5 to the output terminal of the power supply 6. Connect the output terminal of the new transformer 10 in the fourth rectifier module 5 to the input terminal of the new rectifier cabinet 9 in the fourth rectifier module 5. Connect the output terminal of the new rectifier cabinet 9 in the fourth rectifier module 5 to the new output copper busbar 11 in the fourth rectifier module 5. Connect the new output copper busbar 11 in the fourth rectifier module 5 to the original output copper busbar 8 of the second rectifier module 2 through a DC blade, so that the second rectifier module 2 and the fourth rectifier module 5 are connected in parallel.

[0030] The original rectifier cabinet 14 in the first rectifier module 1 and the second rectifier module 2 will generate large harmonics when it is working. However, the newly added third rectifier module 4 and the new rectifier cabinet 9 in the fourth rectifier module 5 can cooperate with each other to form a three-phase bridge in-phase anti-parallel rectifier circuit, which reduces the harmonics of the AC input current and will not affect the original rectifier cabinet 14, thus realizing the expansion of the power supply equipment.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A capacity expansion device for a two-electrolytic series rectifier unit, comprising a first rectifier module (1), a second rectifier module (2), and a primary power supply (3), wherein the primary power supply (3) is electrically connected to the first rectifier module (1) and the second rectifier module (2) respectively, the first rectifier module (1) and the second rectifier module (2) are connected in parallel, and both the first rectifier module (1) and the second rectifier module (2) include a primary rectifier cabinet (14), a primary transformer (7), and a primary output copper busbar (8), characterized in that, Also includes: The third rectifier module (4), the fourth rectifier module (5), and the power supply (6) are connected. The input terminals of the third rectifier module (4) and the fourth rectifier module (5) are connected to the output terminal of the power supply (6). The third rectifier module (4) is connected in parallel with the first rectifier module (1), and the fourth rectifier module (5) is connected in parallel with the second rectifier module (2). The third rectifier module (4) and the fourth rectifier module (5) both include a new rectifier cabinet (9), a new transformer (10) and a new output copper busbar (11). The input end of the new rectifier cabinet (9) is connected to the output end of the new transformer (10), and the output end of the new rectifier cabinet (9) is connected to the new output copper busbar (11).

2. The capacity expansion device for a two-electrolysis series rectifier unit according to claim 1, characterized in that, The new rectifier cabinet (9) includes a 6-pulse three-phase bridge rectifier cabinet.

3. The capacity expansion device for a two-electrolysis series rectifier unit according to claim 1, characterized in that, The new transformer (10) of the third rectifier module (4) includes a 10000 / 707.5V transformer with a phase shift angle of +7.5, and the new transformer (10) of the fourth rectifier module (5) includes a 10000 / 707.5V transformer with a phase shift angle of -7.

5. The input terminals of the new transformer (10) of the third rectifier module (4) and the new transformer (10) of the fourth rectifier module (5) are both connected to the output terminal of the power supply (6).

4. The capacity expansion device for a two-electrolysis series rectifier unit according to claim 1, characterized in that, A first DC knife (12) is provided between the new output copper busbar (11) of the third rectifier module (4) and the original output copper busbar (8) of the first rectifier module (1). A second DC blade (13) is provided between the new output copper busbar (11) of the fourth rectifier module (5) and the original output copper busbar (8) of the second rectifier module (2).

5. The capacity expansion device for a two-electrolysis series rectifier unit according to claim 1, characterized in that, An SDA DC sensor (16) is provided on the positive terminal of the new output copper busbar (11) of the third rectifier module (4) and the positive terminal of the new output copper busbar (11) of the fourth rectifier module (5). A ZDY-N 50KA sensor (17) is installed on the positive terminal of the new output copper busbar (11) of the first rectifier module (1), and a ZDY-N 25KA sensor (18) is installed on the positive terminal of the new output copper busbar (11) of the second rectifier module (2).

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