Quick-switching polyvinyl chloride synthetic power supply system

Abstract

The utility model belongs to the technical field of power supply circuits, and relates to a fast-switching polyvinyl chloride composite power supply system, which comprises a main transformer bus, a first bus, a second bus, a fast switching device, a first switch, a second switch and a bus tie switch, the main transformer bus is electrically connected with the first bus through the first switch, the main transformer bus is electrically connected with the second bus through the second switch, the first bus and the second bus are arranged in parallel and are electrically connected through the bus tie switch, and the quick switching device is electrically connected with the first switch, the second switch and the bus tie switch respectively; the first bus is also connected with a first polyvinyl chloride synthesis electric control cabinet; and the second bus is also connected with a second polyvinyl chloride synthesis electric control cabinet. The system is short in switching time, meets the high reliability and stability of a polyvinyl chloride synthesis power supply system, and guarantees the stable operation of polyvinyl chloride synthesis.

Description

Technical Field

[0001] This utility model belongs to the field of power supply circuit technology and relates to a fast-switching polyvinyl chloride synthetic power supply system. Background Technology

[0002] The process of synthesizing polyvinyl chloride (PVC) by the calcium carbide method involves reacting calcium carbide with pure water in a reactor to generate acetylene gas. The acetylene is then purified and polymerized under the action of an initiator to produce PVC. In addition, since the synthesis of PVC requires a large amount of electricity, a power supply system is usually required for PVC synthesis. Currently, PVC synthesis uses a 10KV power supply system.

[0003] In actual operation, to improve synthesis efficiency, a dual-path PVC synthesis production system is generally used. To ensure stable operation of both PVC synthesis processes, an automatic transfer switch (ATS) is installed. This allows for power circuit switching when one production system fails, ensuring stable operation of both PVC synthesis production systems. However, the ATS requires the backup power supply to load and start up, a process that takes time. This results in long equipment switching times during failures or shutdowns, causing equipment to malfunction even under high loads after the backup power is activated. This fails to meet the high reliability and stability requirements of the PVC synthesis power supply system, leading to unstable PVC synthesis operations. Utility Model Content

[0004] To address the technical problem that existing PVC synthesis power supplies have long switching times, which cannot meet the high reliability and stability requirements of PVC synthesis power supply systems and lead to unstable operation of PVC synthesis, this utility model provides a PVC synthesis power supply system with fast switching.

[0005] This invention adds a fast-switching device between two parallel 10KV busbars to achieve mutual switching between the first switch, the second switch, and the bus tie switch. The switching time is short, which meets the high reliability and stability requirements of the polyvinyl chloride (PVC) synthesis power supply system and ensures the stable operation of PVC synthesis.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A fast-switching polyvinyl chloride synthetic power supply system includes a main transformer bus, a first bus, a second bus, a fast-switching device, a first switch, a second switch, and a bus tie switch;

[0008] The main transformer bus is electrically connected to the first bus via a first switch, and the main transformer bus is electrically connected to the second bus via a second switch. The first bus and the second bus are arranged in parallel and electrically connected via a bus tie switch. The fast-switching device is electrically connected to the first switch, the second switch, and the bus tie switch respectively.

[0009] The first busbar is also connected to a first polyvinyl chloride (PVC) synthesis electrical control cabinet; the second busbar is also connected to a second PVC synthesis electrical control cabinet.

[0010] Further specifying, the quick-cut device is model 7SJ686, MFC2000-6B or SID-40B.

[0011] Further specifying, the rapidly switching polyvinyl chloride synthetic power supply system also includes a first incoming line disposed between the main transformer bus and the first bus; a first incoming line transformer is disposed on the first incoming line; and a first switch is placed on the first incoming line and close to the first bus.

[0012] Furthermore, the rapidly switching polyvinyl chloride synthetic power supply system also includes a second incoming line disposed between the main transformer bus and the second bus, a second incoming line transformer disposed on the second incoming line, and the second switch disposed on the second incoming line and close to the second bus.

[0013] Furthermore, the rapidly switching polyvinyl chloride synthetic power supply system also includes a bus connection line, wherein the first bus is electrically connected to the second bus via the bus connection line, and the bus tie switch is placed on the bus connection line.

[0014] Further specifying, the first polyvinyl chloride synthesis electrical control cabinet is respectively equipped with a first stripping compressor electrical control component, a first unloading and recovery compressor electrical control component, a first hot demineralized water pump electrical control component, a first feeding pump electrical control component, a first Roots blower electrical control component, and a first standby electrical control component; the first stripping compressor electrical control component, the first unloading and recovery compressor electrical control component, the first hot demineralized water pump electrical control component, the first feeding pump electrical control component, the first Roots blower electrical control component, and the first standby electrical control component are respectively electrically connected to the first busbar.

[0015] Further specifying, the first backup electrical control element is the first transformer electrical control element and / or the first motor electrical control element.

[0016] Further specifying, the second polyvinyl chloride synthesis electrical control cabinet is respectively equipped with a second stripping compressor electrical control component, a second unloading and recovery compressor electrical control component, a second hot demineralized water pump electrical control component, a second feeding pump electrical control component, a second Roots blower electrical control component, and a second standby electrical control component; the second stripping compressor electrical control component, the second unloading and recovery compressor electrical control component, the second hot demineralized water pump electrical control component, the second feeding pump electrical control component, the second Roots blower electrical control component, and the second standby electrical control component are respectively electrically connected to the second busbar.

[0017] Further specifying, the second backup electrical control element is the second transformer electrical control element and / or the second motor electrical control element.

[0018] Further specifying, the main transformer bus is a 35KV bus, and the first bus and the second bus are both 10KV bus.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model connects two parallel first and second busbars through a quick-switching device, which can realize rapid switching between the first switch, the second switch and the bus tie switch in a short time. This enables rapid switching between the first PVC synthesis electrical control cabinet and the second PVC synthesis electrical control cabinet, meets the high reliability and stability requirements of the PVC synthesis power supply system, and ensures stable operation of the PVC synthesis system.

[0021] 2. In this utility model, the quick-switching device is model 7SJ686, MFC2000-6B or SID-40B, which has the characteristics of short switching time and convenient connection operation. It can not only shorten the switching time of polyvinyl chloride synthesis circuit, but also improve the reliability and stability of polyvinyl chloride synthesis circuit. Attached Figure Description

[0022] Figure 1 A schematic diagram of a fast-switching polyvinyl chloride synthesis power supply system provided in Example 1;

[0023] Figure 2 Schematic diagram of the fast-switching polyvinyl chloride synthesis power supply system provided for Examples 2 and 3;

[0024] in:

[0025] 10-Main busbar; 20-First busbar; 30-Second busbar; 40-Quick-cut device; 50-First switch; 60-Second switch; 70-Bus tie switch; 80-First PVC synthesis electrical control cabinet; 801-First stripping compressor electrical control component; 802-First unloading recovery compressor electrical control component; 803-First hot demineralized water pump electrical control component; 804-First feed pump electrical control component; 805-First Roots blower electrical control component; 806-First standby electrical control component; 90-Second PVC synthesis electrical control cabinet; 901-Second stripping compressor electrical control component; 902-Second unloading recovery compressor electrical control component; 903-Second hot demineralized water pump electrical control component; 904-Second feed pump electrical control component; 905-Second Roots blower electrical control component; 906-Second standby electrical control component; 100-First incoming transformer; 110-Second incoming transformer. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0028] Techniques, methods, and apparatus known to those skilled in the art need not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated herein.

[0031] Example 1

[0032] See Figure 1 The fast-switching polyvinyl chloride synthetic power supply system provided by this utility model includes a main transformer bus 10, a first bus 20, a second bus 30, a fast-switching device 40, a first switch 50, a second switch 60, and a bus tie switch 70.

[0033] The main transformer bus 10 is electrically connected to the first bus 20 via the first switch 50. The main transformer bus 10 is electrically connected to the second bus 30 via the second switch 60. The first bus 20 and the second bus 30 are arranged in parallel and electrically connected via the bus tie switch 70. The quick-switching device 40 is electrically connected to the first switch 50, the second switch 60 and the bus tie switch 70 respectively. The first bus 20 is also connected to the first polyvinyl chloride (PVC) synthetic electrical control cabinet 80. The second bus 30 is also connected to the second PVC synthetic electrical control cabinet 90.

[0034] The first PVC synthesis electrical control cabinet 80 and the second PVC synthesis electrical control cabinet 90 are the control elements for each electrical device in the two PVC synthesis processes. The first busbar 20 supplies power to the first PVC synthesis electrical control cabinet 80, and the second busbar 30 supplies power to the second PVC synthesis electrical control cabinet 90, thereby energizing each electrical device in the two PVC synthesis processes and ensuring the normal operation of the entire PVC synthesis process.

[0035] In this embodiment, the main transformer bus 10 is a 35KV main transformer bus, and the first bus 20 and the second bus 30 are both 10KV bus.

[0036] In this embodiment, the fast-switching device 40 is model 7SJ686, MFC2000-6B, or SID-40B. Specifically, 7SJ686 is a fast-switching device from Siemens, MFC2000-6B is a fast-switching device manufactured by Jiangsu Jinzhi Technology Co., Ltd., and SID-40B is a fast-switching device manufactured by Shenzhen Guoli Intelligent Power Technology Co., Ltd. These switching devices feature short switching times and convenient connection operations, not only shortening the switching time of the PVC synthesis circuit but also improving its reliability and stability.

[0037] Preferably, the quick-cutting device 40 is model MFC2000-6B.

[0038] The fast-switching polyvinyl chloride synthesis power supply system provided in this embodiment also includes a first incoming line disposed between the main transformer bus 10 and the first bus 20; a first incoming line transformer 100 is disposed on the first incoming line; and a first switch 50 is placed on the first incoming line and close to the first bus 20.

[0039] The fast-switching polyvinyl chloride synthesis power supply system provided in this embodiment also includes a second incoming line disposed between the main transformer bus 10 and the second bus 30. A second incoming line transformer 110 is disposed on the second incoming line, and a second switch 60 is disposed on the second incoming line and close to the second bus 30.

[0040] The fast-switching polyvinyl chloride synthesis power supply system provided in this embodiment also includes a bus connection line. The first bus 20 is electrically connected to the second bus 30 through the bus connection line, and the bus tie switch 70 is placed on the bus connection line.

[0041] In this embodiment, by setting a first incoming transformer 100 and a second incoming transformer 110, power is supplied to the first busbar 20 and the second busbar 30 of the power supply system, respectively.

[0042] In this embodiment, by setting up a first incoming line, a second incoming line, and a bus tie line, the installation of the first switch 50, the second switch 60, and the bus tie switch 70 is facilitated. Moreover, the connection between the main transformer bus 10 and the first bus 20, between the main transformer bus 10 and the second bus 30, and between the first bus 20 and the second bus 30 is made more stable, which facilitates power supply.

[0043] Preferably, the first incoming transformer 100 and the second incoming transformer 110 are both AC transformers with the following operating parameters: rated capacity 20MVA and rated transformation ratio 35KV / 10.5KV. The rated voltage of the first switch 50, the second switch 60, and the bus tie switch 70 is 12KV.

[0044] The fast-switching power supply system for PVC synthesis provided in this embodiment operates as follows: Under normal operating conditions, the first busbar 20 and the second busbar 30 operate in parallel, the first switch 50 and the second switch 60 are closed, and the bus tie switch 70 is open. When either the first switch 50 or the second switch 60 malfunctions (a circuit fault exists in the first busbar 20 or the second busbar 30), the fast-switching device 40 first quickly disconnects the faulty switch 50 or the second switch 60, and then quickly closes the bus tie switch 70, ensuring normal power supply to the first busbar 20 and the second busbar 30. This, in turn, ensures normal power supply to the first PVC synthesis control cabinet 80 and the second PVC synthesis control cabinet 90, guaranteeing the normal operation of both PVC synthesis processes. The entire switching process takes only 40ms, greatly ensuring the stability and reliability of the PVC synthesis power supply system and guaranteeing stable operation of PVC synthesis.

[0045] Example 2

[0046] See Figure 2 Based on Example 1, in the rapidly switching polyvinyl chloride (PVC) synthesis power supply system provided in this example, the first PVC synthesis electrical control cabinet 80 is respectively equipped with a first stripping compressor electrical control component 801, a first unloading and recovery compressor electrical control component 802, a first hot demineralized water pump electrical control component 803, a first feeding pump electrical control component 804, a first Roots blower electrical control component 805, and a first standby electrical control component 806; the first stripping compressor electrical control component 801, the first unloading and recovery compressor electrical control component 802, the first hot demineralized water pump electrical control component 803, the first feeding pump electrical control component 804, the first Roots blower electrical control component 805, and the first standby electrical control component 806 are respectively electrically connected to the first busbar 20.

[0047] In this embodiment, the first backup electrical control element 806 is the first transformer electrical control element and / or the first motor electrical control element. Since the main electrical equipment required in the first polyvinyl chloride synthesis includes two first stripping compressors, two first unloading recovery compressors, two first hot demineralized water pumps, two first feeding pumps, and three Roots blowers, the first polyvinyl chloride synthesis electrical control cabinet 80 is equipped with corresponding electrical control elements 801 for the first stripping compressors, 802 for the first unloading recovery compressors, 803 for the first hot demineralized water pumps, 804 for the first feeding pumps, and 805 for the first Roots blowers, thereby controlling the power supply and power cut-off of each electrical device.

[0048] The circuit connection relationship is illustrated using the first stripping compressor electrical control element 801 as an example. The first stripping compressor electrical control element 801 is located in the first polyvinyl chloride synthesis electrical control cabinet 80. One end of the first stripping compressor electrical control element 801 is electrically connected to the first busbar 20, and the other end is electrically connected to the first stripping compressor. It is used to supply power to the first stripping compressor and simultaneously control its power supply and de-energization. In use, the circuit connections of the first unloading recovery compressor electrical control element 802, the first hot demineralized water pump electrical control element 803, the first feeding pump electrical control element 804, the first Roots blower electrical control element 805, and the first standby electrical control element 806 can all refer to the circuit connection of the first stripping compressor electrical control element 801.

[0049] Preferably, since there are two units each for the first stripping compressor, the first hot demineralized water pump, and the second feed pump, there are two electrical control components 801 for the first stripping compressor, 803 for the first hot demineralized water pump, and 804 for the first feed pump; and since there are three units of the first Roots blower, there are three electrical control components 805 for the first Roots blower.

[0050] In this embodiment, the first PVC synthesis electrical control cabinet 80 mainly provides power input to the electrical equipment used in the first PVC synthesis process. During connection, multiple connection lines are simultaneously branched from the first busbar 20. On each connection line, the input terminal of each electrical control element is electrically connected to the first busbar 20, and the output terminal of each electrical control element is electrically connected to the corresponding electrical equipment, thus enabling power supply to each piece of equipment. During normal operation, the first switch 50 is closed, connecting the main transformer busbar 10, the first incoming line, the first busbar 20, and the first PVC synthesis electrical control cabinet 80, thereby supplying power to the electrical equipment in the first PVC synthesis process and ensuring stable operation of this PVC synthesis process.

[0051] Example 3

[0052] See Figure 2Based on Example 1, in the rapidly switching polyvinyl chloride (PVC) synthesis power supply system provided in this example, the second PVC synthesis electrical control cabinet 90 is respectively equipped with a second stripping compressor electrical control component 901, a second unloading and recovery compressor electrical control component 902, a second hot demineralized water pump electrical control component 903, a second feeding pump electrical control component 904, a second Roots blower electrical control component 905, and a second standby electrical control component 906; the second stripping compressor electrical control component 901, the second unloading and recovery compressor electrical control component 902, the second hot demineralized water pump electrical control component 903, the second feeding pump electrical control component 904, the second Roots blower electrical control component 905, and the second standby electrical control component 906 are respectively electrically connected to the second busbar 30.

[0053] In this embodiment, the second backup electrical control element 906 is the second transformer electrical control element and / or the second motor electrical control element. In practice, since the main electrical equipment required for the second polyvinyl chloride synthesis includes two second stripping compressors, two second unloading and recovery compressors, two second hot demineralized water pumps, two second feeding pumps, and three second Roots blowers, corresponding second stripping compressor electrical control elements 901, second unloading and recovery compressor electrical control elements 902, second hot demineralized water pump electrical control elements 903, second feeding pump electrical control elements 904, and second Roots blower electrical control elements 905 are installed in the second polyvinyl chloride synthesis electrical control cabinet 90 to control the power supply and de-energization of each electrical device.

[0054] The circuit connection relationship is illustrated using the second stripping compressor electrical control element 901 as an example. The second stripping compressor electrical control element 901 is located in the second PVC synthesis electrical control cabinet 90. One end of the second stripping compressor electrical control element 901 is electrically connected to the second busbar 30, and the other end is electrically connected to the second stripping compressor. It is used to supply power to the second stripping compressor and simultaneously control its power supply and de-energization. In use, the circuit connections of the second unloading recovery compressor electrical control element 902, the second hot demineralized water pump electrical control element 903, the second feed pump electrical control element 904, the second Roots blower electrical control element 905, and the second standby electrical control element 906 can all refer to that of the second stripping compressor electrical control element 901.

[0055] Preferably, since there are two units each for the second stripping compressor, the second hot demineralized water pump, and the second feed pump, there are two electrical control components 901 for the second stripping compressor, 903 for the second hot demineralized water pump, and 904 for the second feed pump; and since there are three units of the second Roots blower, there are three electrical control components 905 for the second Roots blower.

[0056] In this embodiment, the second PVC synthesis electrical control cabinet 90 mainly provides power input for the electrical equipment used in the second PVC synthesis process. During connection, multiple connection lines are simultaneously branched from the second busbar 30. On each connection line, the input terminal of each electrical control element is electrically connected to the second busbar 30, and the output terminal of each electrical control element is electrically connected to the corresponding electrical equipment, thus enabling power supply to each piece of equipment. During normal operation, the second switch 60 is closed, connecting the main transformer busbar 10, the first incoming line, the second busbar 30, and the second PVC synthesis electrical control cabinet 90, thereby supplying power to the electrical equipment in the second PVC synthesis process and ensuring stable operation of this PVC synthesis process.

[0057] Examples 2 and 3 list the main electrical equipment for polyvinyl chloride synthesis. When additional electrical equipment is required during synthesis, corresponding electrical control components are installed in the polyvinyl chloride synthesis electrical control cabinet. The additional electrical equipment is then connected in parallel to the first busbar 20 or the second busbar 30 through the electrical control components to achieve power supply.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it, although the utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions should not cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A rapidly switching polyvinyl chloride (PVC) synthetic power supply system, characterized in that, It includes the main transformer bus (10), the first bus (20), the second bus (30), the quick-switching device (40), the first switch (50), the second switch (60), and the bus tie switch (70); The main transformer bus (10) is electrically connected to the first bus (20) via the first switch (50), and the main transformer bus (10) is electrically connected to the second bus (30) via the second switch (60). The first bus (20) and the second bus (30) are arranged in parallel and electrically connected via the bus tie switch (70). The fast switching device (40) is electrically connected to the first switch (50), the second switch (60) and the bus tie switch (70) respectively. The first busbar (20) is also connected to a first polyvinyl chloride synthesis electrical control cabinet (80); the second busbar (30) is also connected to a second polyvinyl chloride synthesis electrical control cabinet (90).

2. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 1, characterized in that, The quick-cut device (40) is model 7SJ686, MFC2000-6B or SID-40B.

3. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 2, characterized in that, The rapidly switching polyvinyl chloride synthetic power supply system also includes a first incoming line set between the main transformer bus (10) and the first bus (20); a first incoming line transformer (100) is set on the first incoming line; and a first switch (50) is placed on the first incoming line and close to the first bus (20).

4. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 3, characterized in that, The fast-switching polyvinyl chloride synthetic power supply system also includes a second incoming line set between the main transformer bus (10) and the second bus (30), a second incoming line transformer (110) is set on the second incoming line, and the second switch (60) is placed on the second incoming line and close to the second bus (30).

5. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 4, characterized in that, The fast-switching polyvinyl chloride synthetic power supply system also includes a bus connection line, the first bus (20) is electrically connected to the second bus (30) through the bus connection line, and the bus tie switch (70) is placed on the bus connection line.

6. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 1, characterized in that, The first polyvinyl chloride synthesis electrical control cabinet (80) is equipped with a first stripping compressor electrical control element (801), a first unloading and recovery compressor electrical control element (802), a first hot demineralized water pump electrical control element (803), a first feeding pump electrical control element (804), a first Roots blower electrical control element (805), and a first standby electrical control element (806); the first stripping compressor electrical control element (801), the first unloading and recovery compressor electrical control element (802), the first hot demineralized water pump electrical control element (803), the first feeding pump electrical control element (804), the first Roots blower electrical control element (805), and the first standby electrical control element (806) are electrically connected to the first busbar (20).

7. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 6, characterized in that, The first backup electrical control element (806) is the first transformer electrical control element and / or the first motor electrical control element.

8. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 6, characterized in that, The second polyvinyl chloride synthesis electrical control cabinet (90) is equipped with a second stripping compressor electrical control element (901), a second unloading and recovery compressor electrical control element (902), a second hot demineralized water pump electrical control element (903), a second feeding pump electrical control element (904), a second Roots blower electrical control element (905), and a second standby electrical control element (906); the second stripping compressor electrical control element (901), the second unloading and recovery compressor electrical control element (902), the second hot demineralized water pump electrical control element (903), the second feeding pump electrical control element (904), the second Roots blower electrical control element (905), and the second standby electrical control element (906) are electrically connected to the second busbar (30).

9. The rapidly switching polyvinyl chloride synthesis power supply system according to claim 8, characterized in that, The second backup electrical control element (906) is the second transformer electrical control element and / or the second motor electrical control element.

10. The rapidly switching polyvinyl chloride synthesis power supply system according to any one of claims 1-9, characterized in that, The main transformer bus (10) is a 35KV bus, and the first bus (20) and the second bus (30) are both 10KV bus.

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