A method for cleaning section electrode plate partition control

Abstract

This invention relates to the field of cost reduction and efficiency improvement in steel rolling technology, specifically disclosing a method for zoned control of electrode plates in the cleaning section. The electrode plate is divided into five independent controllable units: a central base section, a left widening section, a right widening section, a left fine-tuning section, and a right fine-tuning section. All five electrode plates are fixed with upper and lower insulating supports, and an insulating liner is laid on the back of each electrode plate. Conductive copper busbars and terminals are fixed to the outside of the insulating liner for each electrode plate segment, connecting to an independent rectifier branch. The rectifier branch is connected to a PLC control system for segmented power control. The actual width signal of the incoming strip is collected by an online strip width detection device and transmitted to the PLC control system. The PLC control system automatically controls the switching of each segment of the electrode plate according to preset logic. This invention effectively reduces ineffective power consumption, significantly reduces power loss in the cleaning section, and thus optimizes and manages the overall production and operation costs of the entire unit, significantly reducing the overall power consumption of the cleaning section.

Description

Technical Field

[0001] This invention relates to the field of cost reduction and efficiency improvement technology in steel rolling, specifically to a method for zoned control of electrode plates in the cleaning section. Background Technology

[0002] In the continuous annealing production process, the cleaning section is a key process to ensure the cleanliness of the incoming strip steel surface. By thoroughly removing residual oil, residual iron, and various impurities from the strip steel surface, the formation of furnace roll nodules can be effectively inhibited, and surface defects such as roll marks and indentations caused by foreign objects on the plate surface can be avoided. This is an important process link for stabilizing product quality and improving customer satisfaction.

[0003] Currently, the cleaning section of the production line uses a combined process of a two-stage alkaline washing vertical spray tank, a vertical electrolytic tank, and hot water rinsing. The electrolytic tank uses an alkaline solution as the electrolyte medium, and by applying direct current, an electrolytic reaction occurs on the surface of the strip steel, releasing hydrogen and oxygen microbubbles. Relying on the synergistic effect of electrochemical polarization, mechanical debonding of bubbles, and chemical saponification by the alkaline solution, oil, iron powder, and minute impurities adhering to the strip steel surface are efficiently removed. Existing electrolytic tanks use an integrated fixed electrode plate structure. Regardless of whether narrow or wide strip steel is produced, the entire electrode plate is energized throughout its entire range. This results in a large number of ineffective energized areas in the narrow strip steel production section, causing significant energy loss and exacerbating energy waste in the production line. Therefore, it is necessary to design a method for precise control of the electrode plate in the cleaning section of a continuous annealing production line, allowing for wide-area zoning of the strip steel, to solve the problem of energy waste caused by the overall energization of the electrode plate in the existing electrolytic tank technology. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a method for zoned control of the electrode plates in the cleaning section. This method optimizes and transforms the original integrated fixed electrode plate into a multi-segment independent, separate electrode structure. By identifying the actual width of the incoming strip steel online in real time, it achieves automatic cutting and precise start-up and shutdown of each segment of the electrode plate. This method effectively reduces ineffective power consumption and significantly lowers power losses in the cleaning section, while ensuring stable and satisfactory electrolytic cleaning efficiency and surface cleanliness throughout the entire process. This ultimately improves the quality and efficiency of the production line and saves production costs.

[0005] The technical solution adopted by this invention to solve its technical problem is: a method for zoned control of electrode plates in a cleaning section, comprising the following steps:

[0006] S1. The electrode plate is divided into 5 independent controllable units: including the central basic section, the left widening section, the right widening section, the left fine-tuning section, and the right fine-tuning section;

[0007] Both S2 and S5 electrode plates are fixed with upper and lower insulating brackets. An insulating liner is laid on the back of the electrode plate. Each electrode plate has a conductive copper busbar and terminal block fixed on the outside of the insulating liner for connecting an independent rectifier branch. The rectifier branch is connected to the PLC control system for segmented power control.

[0008] S3. The actual width signal of the incoming strip steel is collected by the strip steel online plate width detection device and transmitted to the PLC control system. The PLC control system automatically controls the cutting of each segment electrode plate according to the preset logic.

[0009] Specifically, in step S1, the electrode plate after being segmented is a rectangular flat plate structure made of 316L stainless steel. The plate thickness is 10-12mm, and Φ8-12mm through holes are evenly opened on the plate surface for electrolyte flow.

[0010] Specifically, in step S1, the central base section is located at the center of the electrode plate, with a width of 1000mm. It is the core working section and is compatible with strip steel with a maximum width of 1000mm. The left and right sides of the central base section are respectively connected to the left widening section and the right widening section. A gap of 2-3mm is reserved at the connection point for insulation separation.

[0011] Specifically, in step S1, the left and right widening sections are symmetrically arranged on the left and right sides of the central base section. The width of the left and right widening sections is 250mm, and the total width of the left and right widening sections is 500mm. The structure and dimensions of the left and right widening sections are completely identical, which can accommodate the expansion requirements of strip width from 1000mm to 1450mm.

[0012] Specifically, in step S1, the left and right fine-tuning segments are symmetrically arranged outside the left and right widening segments. The width of both the left and right fine-tuning segments is 200mm, and the total width of the left and right fine-tuning segments is 400mm. The structure and dimensions of the left and right fine-tuning segments are completely identical, which can accommodate the fine-tuning expansion requirements of strip width from 1450mm to 1880mm.

[0013] Specifically, in step S2, the insulating liner is made of epoxy resin and has a thickness of 3-5 mm; the upper and lower insulating supports are made of insulating resin; the electrode plates are installed on both sides of the strip inside the electrolytic cell, with the electrode plates parallel to the surface of the strip and the distance between the electrode plates and the strip maintained at 15-20 mm.

[0014] Specifically, the strip width detection device in step S3 uses a laser detector or a CCD strip width meter, and the actual width of the incoming strip is expressed as W, in mm.

[0015] Specifically, the preset logic in step S3 is the electrode plate activation logic, which includes:

[0016] S31. When W≤1000mm, only the middle foundation section is put into operation, and the left widening section, right widening section, left fine-tuning section, and right fine-tuning section are all de-energized.

[0017] S32. When 1000 < W ≤ 1450 mm, the middle foundation section, left widening section, and right widening section are put into use, with a total working width of 1500 mm.

[0018] S33, 1450<W≤1880mm, 5 electrode plates are used throughout the section, with a total working width of 1900mm.

[0019] The present invention has the following beneficial effects:

[0020] The electrode plate zoning control method for the cleaning section designed in this invention optimizes the original integrated monolithic electrode plate into a five-segment independent split electrode plate structure. Based on the actual width specifications of the strip steel, it achieves automatic switching and precise power control of the corresponding area electrode plate. While ensuring stable and consistent strip steel surface cleaning quality without degradation throughout the process, it effectively reduces ineffective power consumption, significantly lowers power losses in the cleaning section, and thus optimizes and manages the overall unit's production and operating costs.

[0021] The method for zoned control of the electrode plates in the cleaning section designed in this invention achieves intelligent control by optimizing the electrode plate structure layout and control strategy, and accurately matching and automatically switching the working area of ​​the electrode plates according to the actual width of the strip steel online. Under the premise of ensuring the stability of unit operation and the cleanliness efficiency of strip steel surface cleaning without degradation throughout the process, it can significantly reduce ineffective energy consumption and greatly reduce the overall power consumption of the cleaning section. Attached Figure Description

[0022] Fig. 1 This is a flowchart of the method for zoned control of the electrode plates in the cleaning section.

[0023] Fig. 2 This is a dimensional structural diagram of the electrode plate partitions in the cleaning section. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] like Figs. 1-2As shown, a method for zoned control of the cleaning section electrode plate is proposed. Based on the unit's production capacity (800-1880mm), the original integrated fixed electrode plate has a width of 1900mm. The electrode plate structure is optimized by dividing the integrated plate into 5 control sections: section 1 with a width of 1000mm, section 2 with a width of 250mm, and section 2 with a width of 200mm. An automatic use and control model for the electrode plate zoned control is constructed based on feedback from the strip width, achieving real-time matching and optimization between ensuring cleaning capacity and reducing power consumption.

[0026] The specific modifications to the electrode plate structure are as follows:

[0027] The segmented electrode plate is a rectangular flat plate structure made of 316L stainless steel with a thickness of 10-12mm. The plate surface has evenly distributed through holes with a diameter of Φ8-12mm for electrolyte flow and to reduce operating resistance. An insulating liner (made of epoxy resin) with a thickness of 3-5mm is laid on the back of the plate to prevent the electrode plate from conducting electricity with the mounting bracket. At the same time, conductive copper busbars and terminals are fixed on the outside of the insulating liner of each segment of the electrode plate for connecting independent rectifier branches to achieve segmented power control.

[0028] The electrode plate is divided into 5 independent controllable units, arranged in a centrally symmetrical manner with steel strips centered. The dimensions and positions of each segment are as follows:

[0029] 1. Middle base section (section 1): Located at the center of the electrode plate, with a width of 1000mm, it is the core working section and is compatible with strip steel with a maximum thickness of 1000mm. The left and right sides of this section are seamlessly connected to the left widening section and the right widening section respectively. A gap of 2-3mm is reserved at the connection point for insulation separation to avoid conductive interference between sections.

[0030] 2. Widening Section (2 sections): Symmetrically arranged on the left and right sides of the central foundation section, each section is 250mm wide, and the total width of the left and right widening sections is 500mm. The left widening section is located on the left side of the central foundation section, and the right widening section is located on the right side of the central foundation section. The structure and dimensions of the left and right widening sections are completely identical, and they can accommodate the expansion requirements of strip width from 1000mm to 1450mm.

[0031] 3. Fine-tuning section (2 sections): Symmetrically arranged on the outside of the widening sections on both sides, each section is 200mm wide, and the total width of the left and right fine-tuning sections is 400mm; the left fine-tuning section is located to the left of the left widening section, and the right fine-tuning section is located to the right of the right widening section. The structure and dimensions of the left and right fine-tuning sections are completely identical, and they are adapted to the fine-tuning expansion requirements of strip width from 1450mm to 1880mm.

[0032] The total width of each segmented electrode plate is: 1000mm (central basic segment) + 250mm (left widening segment) + 250mm (right widening segment) + 200mm (left fine-tuning segment) + 200mm (right fine-tuning segment) + 2mm*4 (spacing between segments) = 1908mm, which is consistent with the width of the original integrated electrode plate, ensuring that it matches the size of the electrolytic cell and that no modification to the cell is required.

[0033] The installation is as follows: all 5 electrode plates are fixed with upper and lower insulating brackets made of insulating resin. Each electrode plate can be disassembled and installed independently for easy maintenance and replacement. The electrode plates are installed on both sides of the strip inside the electrolytic cell, with the electrode plates parallel to the surface of the strip. The distance between the electrode plates and the strip is maintained at 15-20mm to ensure uniform electrolytic reaction and to prevent the strip from rubbing and scratching the electrode plates during operation.

[0034] Zoned control logic: The actual width signal of the incoming strip is collected by the online strip width detection device and transmitted to the PLC control system. The PLC control system automatically controls the switching (energizing / de-energizing) of each segment electrode plate according to the preset logic, so as to achieve precise matching between the strip width and the working section of the electrode plate. The specific correspondence is as follows:

[0035] The logic formula for electrode plate activation is as follows, where W represents the actual width of the incoming strip steel (unit: mm), and the corresponding activation modes are as follows:

[0036] 1. Only the basic section is put into operation; the widened section and the fine-tuning section are powered off (W≤1000mm).

[0037] 2. The working section consists of a basic section and two widened sections on both sides (250mm×2), with a total working width of 1500mm (1000<W≤1450mm).

[0038] 3. Five electrode plates are used throughout the section, with a total working width of 1900mm (1450 < W ≤ 1880mm).

[0039] Note: Each electrode plate is equipped with an independent rectifier branch, circuit breaker and contactor, and is precisely controlled by the PLC control system to ensure that each electrode plate can be started and stopped independently without interference. The plate width detection signal is fed back in real time, and the PLC control system dynamically adjusts the electrode plate switching status according to the signal changes to achieve real-time matching between cleaning capacity and power consumption, minimizing ineffective power consumption while ensuring the cleaning quality of the strip steel.

[0040] Once the model is established, verify whether the electrode plate deployment and plate width adaptive adjustment are correct.

[0041] For example: Assuming the incoming material width is 1350mm, the electrode plate uses the central base section + double-sided widened sections (250mm×2), with a total working width of 1500mm.

[0042] In existing continuous annealing production lines, the electrode plate in the cleaning section of the electrolytic cell uses a one-piece, monolithic structure. This structure has a significant drawback: regardless of the specifications (width) of the incoming strip, the entire electrode plate remains continuously energized throughout the entire process. Especially when producing narrow strips, the areas of the electrode plate not in contact with the strip remain ineffectively energized, resulting in substantial energy waste and indirectly increasing the production line's operating costs. To address these shortcomings, this invention innovatively transforms the electrode plate structure, optimizing the traditional one-piece electrode plate into a segmented, independently controllable structure. Utilizing the strip width signal collected by an online strip width recognition device, this invention achieves automatic and precise matching between the electrode plate's working area and the actual width of the strip, enabling the timely activation and deactivation of corresponding segmented electrode plates. This improved solution effectively eliminates energy consumption in ineffective areas while ensuring that the surface cleaning quality of the strip remains undiminished and the cleaning efficiency remains stable. This significantly reduces energy consumption in the cleaning section, thereby substantially saving production line costs and resolving the core pain point of severe energy waste in the original technology.

[0043] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0044] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A method for zoned control of electrode plates in a cleaning section, characterized in that, Includes the following steps: S1. The electrode plate is divided into 5 independent controllable units: including the central basic section, the left widening section, the right widening section, the left fine-tuning section, and the right fine-tuning section; Both S2 and S5 electrode plates are fixed with upper and lower insulating brackets. An insulating liner is laid on the back of the electrode plate. Each electrode plate has a conductive copper busbar and terminal block fixed on the outside of the insulating liner for connecting an independent rectifier branch. The rectifier branch is connected to the PLC control system for segmented power control. S3. The actual width signal of the incoming strip steel is collected by the strip steel online plate width detection device and transmitted to the PLC control system. The PLC control system automatically controls the cutting of each segment electrode plate according to the preset logic.

2. The method for zoned control of the cleaning section electrode plate according to claim 1, characterized in that, In step S1, the electrode plate after being segmented is a rectangular flat plate structure made of 316L stainless steel. The plate thickness is 10-12mm, and Φ8-12mm through holes are evenly opened on the plate surface for electrolyte flow.

3. The method for zoned control of the electrode plate in the cleaning section according to claim 1, characterized in that, The central base section in step S1 is located at the center of the electrode plate, with a width of 1000mm. It is the core working section and is compatible with strip steel with a maximum width of 1000mm. The left and right sides of the central base section are respectively connected to the left widening section and the right widening section. A gap of 2-3mm is reserved at the connection point for insulation separation.

4. The method for zoned control of the cleaning section electrode plate according to claim 1, characterized in that, In step S1, the left and right widening sections are symmetrically arranged on the left and right sides of the middle base section. The width of the left and right widening sections is 250mm, and the total width of the left and right widening sections is 500mm. The structure and dimensions of the left and right widening sections are completely identical, which can accommodate the expansion requirements of strip width from 1000mm to 1450mm.

5. The method for zoned control of the cleaning section electrode plate according to claim 1, characterized in that, In step S1, the left and right fine-tuning segments are symmetrically arranged outside the left and right widening segments. The width of the left and right fine-tuning segments is 200mm, and the total width of the left and right fine-tuning segments is 400mm. The structure and size of the left and right fine-tuning segments are completely identical, which can accommodate the fine-tuning expansion requirements of strip width from 1450mm to 1880mm.

6. The method for zoned control of the cleaning section electrode plate according to claim 1, characterized in that, The insulating liner in step S2 is made of epoxy resin and has a thickness of 3-5 mm. The upper and lower insulating supports are made of insulating resin. The electrode plates are installed on both sides of the strip inside the electrolytic cell, with the electrode plates parallel to the surface of the strip and the distance between the electrode plates and the strip maintained at 15-20 mm.

7. The method for zoned control of the electrode plate in the cleaning section according to claim 1, characterized in that, The online strip width detection device in step S3 uses a laser detector or a CCD strip width meter. The actual width of the incoming strip is expressed as W, in mm.

8. The method for zoned control of the electrode plate in the cleaning section according to claim 7, characterized in that, The preset logic in step S3 is the electrode plate activation logic, including: S31. When W≤1000mm, only the middle foundation section is put into operation, and the left widening section, right widening section, left fine-tuning section, and right fine-tuning section are all de-energized. S32. When 1000 < W ≤ 1450 mm, the middle foundation section, left widening section, and right widening section are put into use, with a total working width of 1500 mm. S33, 1450<W≤1880mm, 5 electrode plates are used throughout the section, with a total working width of 1900mm.

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