An inlet cleaning system for a modified galvanizing line in Sendzimir

Abstract

This utility model discloses an inlet cleaning system for a Sendzimir modified galvanizing line. The cleaning system is located at the inlet of the Sendzimir modified galvanizing line and includes an alkaline washing section and an electrolytic cleaning section. The alkaline washing section performs alkaline washing on the cold-rolled substrate on the Sendzimir modified galvanizing line. The alkaline washing section includes an alkaline washing tank and four sets of cleaning brush rollers evenly arranged along the length of the Sendzimir modified galvanizing line. The electrolytic cleaning section performs electrolytic cleaning on the cold-rolled substrate and includes an electrolytic cleaning tank. The electrolytic cleaning section is located downstream of the alkaline washing section. This utility model has a simple structure and is easy to operate. It meets the cleanliness improvement requirements for high-quality surface galvanized sheets for household appliances produced on the Sendzimir modified galvanizing line, greatly improving the cleaning capability at the inlet of the Sendzimir modified galvanizing line and reducing surface quality fluctuations of the galvanized sheets for household appliances caused by contamination.

Description

Technical Field

[0001] This utility model relates to the technical field of galvanizing production line equipment, and in particular to an inlet cleaning system for Sendzimir's improved galvanizing line. Background Technology

[0002] Due to excessive residual rolling oil on the surface of cold-rolled substrates, the sludge containing a large amount of iron powder is difficult to clean. In actual production, wide and thin cold-rolled coils often suffer from incomplete cleaning at the galvanizing inlet. Specifically, the conventional Sendzimir modified galvanizing line inlet cleaning design uses only two simple sets of cleaning brush rollers for low-pressure water cleaning, resulting in poor actual cleaning ability. This ultimately carries a large amount of iron powder to other roller sets in the galvanizing production line, where it cannot be removed in other steps. This leads to abnormalities such as zinc spots after galvanizing, failing to meet the current high-requirement requirements for galvanized sheets used in household appliances.

[0003] Therefore, those skilled in the art are dedicated to developing an inlet cleaning system for Sendzimir's improved galvanizing line to solve problems such as the inability to effectively remove excessive residual sludge from the surface of cold-rolled substrates at the galvanizing line inlet, which causes zinc scars. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this utility model is how to solve the problem of zinc scars caused by the inability to effectively remove excessive residual oil and sludge from the surface of cold-rolled substrates at the galvanizing line inlet.

[0005] To achieve the above objectives, this utility model provides an inlet cleaning system for a Sendzimir modified galvanizing line. The cleaning system is installed at the inlet of the Sendzimir modified galvanizing line and includes:

[0006] An alkaline washing section is configured to perform alkaline washing on cold-rolled substrates on a Sendzimir modified galvanizing line. The alkaline washing section includes an alkaline washing tank and four sets of cleaning brush rollers, the four sets of cleaning brush rollers being evenly arranged along the length of the Sendzimir modified galvanizing line.

[0007] An electrolytic cleaning section device, the electrolytic cleaning section device being configured to perform electrolytic cleaning on the cold-rolled substrate, the electrolytic cleaning section device including an electrolytic cleaning tank;

[0008] The electrolytic cleaning section is located downstream of the alkaline cleaning section.

[0009] Furthermore, it also includes a steam generator, with the alkaline washing tank pipe connected to the steam generator and the electrolytic cleaning tank pipe connected to the steam generator.

[0010] Furthermore, it also includes multiple sets of drive rollers, a portion of which are evenly arranged in the alkaline washing tank and the electrolytic cleaning tank along the length of the Sendzimir modified galvanizing line, for carrying the cold-rolled substrate, and are configured to rotate to drive the cold-rolled substrate to move along the length of the Sendzimir modified galvanizing line.

[0011] Furthermore, it also includes a speed control device configured to control the rotational speed of the drive roller assembly, thereby changing the movement speed of the cold-rolled substrate on the Sendzimir modified galvanizing line.

[0012] Furthermore, the cleaning brush roller assembly is fixedly disposed above the cold-rolled substrate.

[0013] Furthermore, the electrolytic cleaning section equipment includes an electrolytic electrode, one end of which is disposed in the electrolyte of the electrolytic cleaning tank.

[0014] Furthermore, it also includes a rinsing section, which is located downstream of the electrolytic cleaning section. The rinsing section includes a rinsing tank and a spraying device. A portion of the multiple sets of drive rollers are evenly arranged in the rinsing tank along the length of the Sendzimir modified galvanizing line. The spraying device is positioned above the cold-rolled substrate, with the spray nozzles facing the cold-rolled substrate.

[0015] Furthermore, it also includes a squeezing section device, which is located downstream of the rinsing section device. The squeezing section device includes a squeezing trough and a squeezing roller group. A portion of the multiple drive roller groups are evenly arranged in the squeezing trough along the length direction of the Sendzimir modified galvanizing line. The squeezing roller group includes a pair of squeezing rollers located on both sides of the cold-rolled substrate.

[0016] Furthermore, it also includes a drying section device located downstream of the extrusion section device. The drying section device includes a drying chamber and a hot air device. A portion of the multiple sets of drive rollers are evenly arranged in the drying chamber along the length of the Sendzimir modified galvanizing line. The hot air device is configured to supply hot air into the drying chamber.

[0017] Furthermore, the spray device is connected to the steam generator via piping.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention has a simple structure and is easy to operate. It meets the cleanliness improvement requirements of high-quality surface galvanized sheets for home appliances produced on the Sendzimir modified galvanizing line, greatly improves the cleaning capability of the Sendzimir modified galvanizing line inlet, and reduces surface quality fluctuations of galvanized sheets for home appliances caused by contamination.

[0020] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0022] Among them, 1-alkali washing section equipment, 2-electrolytic cleaning section equipment, 3-rinsing section equipment, 4-squeezing section equipment, 5-drying section equipment, and 6-steam generator. Detailed Implementation

[0023] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0024] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0025] In the production process of high-quality galvanized steel for home appliances, several crucial factors are at play. These factors include the amount of residual sludge on the surface of the cold-rolled substrate, the cleaning capacity of the alkaline washing section at the galvanizing inlet, the temperature of the alkaline washing, the concentration of the alkaline washing solution (NaOH), the availability of electrolytic cleaning equipment, and the temperature of the electrolytic cleaning. These factors significantly affect the control of the cleaning capacity at the galvanizing line inlet and are the most important quality assurance for ensuring the excellent surface quality of galvanized steel sheets for home appliances.

[0026] This invention improves the cleanliness of cold-rolled substrates at the inlet of a Sendzimir modified galvanizing line, specifically through modifications to the cleaning system and adjustments to the production process. Improvements to the alkaline washing and electrolytic cleaning sections increase cleaning efficiency and surface cleanliness of the cold-rolled substrates. This also enhances the cleaning quality stability of cold-rolled substrates used in appliance galvanized steel sheets, reducing surface quality fluctuations caused by incomplete cleaning and ultimately improving the surface quality of the final product.

[0027] This invention effectively solves the problems existing in the prior art by adjusting the cleaning system and process at the galvanizing line inlet. The cleaning capacity of the alkaline washing section is improved by increasing the number of cleaning brush rollers and the length of the material collection rack; the cleaning efficiency is enhanced by adjusting the alkaline washing temperature and increasing the NaOH concentration. An electrolytic cleaning section is added at the galvanizing line inlet to further clean surface residues such as sludge that the alkaline washing section cannot remove; and the electrolytic cleaning efficiency is improved by controlling the electrolytic temperature through an automatic temperature control system. These adjustments to the cleaning system and process ensure that the galvanizing line effectively and stably cleans residual sludge from the surface of the cold-rolled substrate, achieving highly efficient and clean cold-rolled substrate production. This invention features a stable process, a simple cleaning procedure, and is easy for production personnel to operate. It also boasts low production costs, meeting the cleanliness improvement requirements for high-quality surface galvanized sheets for household appliances produced on Sendzimir's improved galvanizing line, ensuring stable quality of the cold-rolled substrate cleaned at the galvanizing line inlet. The cleaning system of this invention has a simple structure, reasonable design, low production and operating costs, and is very easy to operate, making it suitable for the high-cleanliness production process requirements of cold-rolled substrates at the galvanizing line inlet. Example

[0028] like Figure 1 As shown, this embodiment provides an inlet cleaning system for Sendzimir's improved galvanizing line, used in the production of galvanized sheets for household appliances with high surface quality requirements, thereby improving the surface quality of cold-rolled substrates on Sendzimir's improved galvanizing line.

[0029] The cleaning system is located at the entrance of the Sendzimir modified galvanizing line and includes an alkaline washing section 1, an electrolytic cleaning section 2, and a steam generator 6. The electrolytic cleaning section 2 is located downstream of the alkaline washing section 1.

[0030] Alkali washing section equipment 1 can perform alkali washing on cold-rolled substrates on the Sendzimir modified galvanizing line. Alkali washing section equipment 1 includes an alkali washing tank, an alkali washing control device, and four sets of cleaning brush rollers. The alkali washing tank is connected to a steam generator 6. The alkali washing control device can control the temperature of the alkali washing tank and the concentration of the alkali washing solution. The four sets of cleaning brush rollers are evenly arranged along the length of the Sendzimir modified galvanizing line and are fixedly installed near the top of the cold-rolled substrate.

[0031] When the cold-rolled substrate enters the alkaline washing tank, it is immersed in the alkaline washing solution and moves slowly. At the same time, the cleaning brush roller assembly rotates to brush the surface of the cold-rolled substrate. Under the chemical action of the alkaline washing solution and the mechanical friction of the cleaning brush roller assembly, impurities such as sludge and iron powder on the surface of the cold-rolled substrate are removed.

[0032] The electrolytic cleaning section equipment 2 can perform electrolytic cleaning on cold-rolled substrates. The electrolytic cleaning section equipment 2 includes an electrolytic cleaning tank and an electrolytic cleaning control device. The electrolytic cleaning tank is connected to a steam generator 6. The electrolytic cleaning control device can control the current density and temperature of the electrolytic cleaning tank.

[0033] The cleaning system also includes multiple sets of drive rollers and a speed control device. Some drive roller sets are evenly arranged along the length of the Sendzimir modified galvanizing line in the alkaline washing tank and the electrolytic cleaning tank. They are used to support the cold-rolled substrate and can rotate to move the cold-rolled substrate along the length of the Sendzimir modified galvanizing line. The speed control device can control the rotation speed of the drive roller sets, thereby changing the movement speed of the cold-rolled substrate on the Sendzimir modified galvanizing line.

[0034] The electrolytic cleaning section equipment 2 also includes an electrolytic electrode. The input end of the electrolytic electrode is electrically connected to the electrolytic cleaning control device, and the output end of the electrolytic electrode is placed in the electrolyte of the electrolytic cleaning tank.

[0035] After alkaline washing, the cold-rolled substrate enters the electrolytic cleaning tank. The electrode, acting as either the cathode or anode, is connected to one pole of the electrolytic DC power supply, while the electrolytic electrode, also acting as either the anode or cathode, is connected to the other pole. A direct current is applied between the electrode and the cold-rolled substrate. The hydrogen and oxygen generated by the electrode reaction physically and chemically remove oil and grease from the surface of the substrate. The electrolytic cleaning section 2 has high degreasing efficiency, effectively removing grease, oil, and some iron powder from the surface of the cold-rolled substrate, preparing it for subsequent galvanizing.

[0036] In one embodiment, a rinsing section device 3 is also included. The rinsing section device 3 is located downstream of the electrolytic cleaning section device 2. The rinsing section device 3 includes a rinsing tank and a spraying device. Some drive roller groups are evenly arranged in the rinsing tank along the length direction of the Sendzimir modified galvanizing line. The spraying device is set above the cold-rolled substrate, and the spray nozzles of the spraying device are set towards the cold-rolled substrate. The spraying device pipe is connected to the steam generator 6.

[0037] The cold-rolled substrate moves slowly through the rinsing tank, and the spraying device sprays rinsing water evenly and under high pressure onto the surface of the cold-rolled substrate to wash away the residual alkali, electrolyte and other impurities on the surface of the cold-rolled substrate, so as to prevent them from affecting the quality of subsequent galvanizing.

[0038] In some embodiments, the steam flow rate can be increased and the temperature of the rinsing water can be increased by increasing the diameter of the steam pipe in the rinsing section equipment 3.

[0039] In one embodiment, the device also includes a squeezing section 4, which is located downstream of the rinsing section 3. The squeezing section 4 includes a squeezing trough and a squeezing roller group. Some drive roller groups are evenly arranged in the squeezing trough along the length direction of the Sendzimir modified galvanizing line. The squeezing roller group includes a pair of squeezing rollers located on both sides of the cold-rolled substrate.

[0040] After rinsing, the surface of the cold-rolled substrate retains a large amount of moisture. If this moisture is not removed promptly, it may enter the subsequent galvanizing process, affecting the galvanizing quality. Squeeze rollers apply pressure to the surface of the cold-rolled substrate to remove excess moisture, keeping the surface relatively dry and preparing it for subsequent drying and galvanizing processes.

[0041] In one embodiment, a drying section device 5 is also included, which is located downstream of the extrusion section device 4. The drying section device 5 includes a drying chamber and a hot air device. Some drive roller groups are evenly arranged in the drying chamber along the length of the Sendzimir modified galvanizing line. The hot air device is configured to supply hot air into the drying chamber.

[0042] Even after being squeezed dry, the cold-rolled substrate still retains a small amount of moisture. Upon entering the drying section (equipment 5), a hot air device blows hot air onto the surface of the cold-rolled substrate, causing the moisture to evaporate rapidly. The dried cold-rolled substrate surface is free of moisture, avoiding quality problems such as bubbles and uneven zinc layers caused by moisture during subsequent galvanizing.

[0043] In this embodiment, the alkaline washing section equipment 1 at the galvanizing line entrance adds two sets of alkaline washing brush rollers to the existing alkaline washing section equipment, increasing the number of cleaning brush roller sets from two to four. At the same time, the length of the material collection rack of the alkaline washing section equipment 1 is doubled, and the alkaline washing time is generally controlled between 1 and 5 minutes, which increases the cleaning capacity of the alkaline washing section equipment 1 by about 100%, enabling it to clean most of the oil sludge and iron powder components, effectively improving the cleaning effect of the alkaline washing section equipment 1.

[0044] In one embodiment, the alkaline washing section equipment 1 increases the alkaline washing temperature by adding steam pipelines, thereby further enhancing the cleaning effect of the alkaline washing section equipment 1. The automatic temperature control module in the alkaline washing control device of the alkaline washing section equipment 1 controls the alkaline washing temperature, generally maintaining it between 75°C and 85°C, and actually adjusting it to around 80°C. By increasing the temperature, the cleaning effect of alkaline washing is greatly improved.

[0045] In one embodiment, the NaOH concentration is controlled by the automatic dosing control module in the alkaline washing control device of the alkaline washing section equipment 1 to improve the alkaline washing efficiency. Generally, the NaOH concentration is controlled in the range of 70 to 100 g / L, and is actually adjusted to around 80 g / L.

[0046] In this embodiment, an electrolytic cleaning section 2 is added to the cleaning system. This section electrolyzes the electrolyte in the electrolytic cleaning tank, effectively cleaning deep-seated oil stains on the surface of the cold-rolled substrate that are difficult to remove even with alkaline washing, thereby improving the cleaning effect. Preferably, the electrolyte in the electrolytic cleaning tank is an alkaline electrolyte. In some embodiments, surfactants and other auxiliary ingredients may be added to enhance the degreasing effect.

[0047] In one embodiment, in order to improve the cleaning effect of the electrolytic cleaning section equipment 2, the temperature of the electrolyte in the electrolytic cleaning tank is controlled by the automatic temperature control module in the electrolytic cleaning control device of the electrolytic cleaning section equipment 2. The temperature must be maintained between 75°C and 80°C. The actual temperature control varies according to the change in the cleanliness of the cold-rolled substrate surface, and is generally controlled at around 78°C.

[0048] In some embodiments, the current density can be increased by increasing the diameter of the conductive lines on the electrodes in the electrolytic cleaning section equipment 2, thereby improving the electrolytic cleaning capability.

[0049] In one embodiment, the current density of the electrolytic cleaning tank is controlled by the automatic current density control module in the electrolytic cleaning control device of the electrolytic cleaning section equipment 2, typically between 1 and 10 A / dm³. 2 Within the range, more preferably, in the range of 5 to 10 A / dm 2 Within a suitable range, an appropriate current density can ensure the smooth progress of the electrolytic reaction and improve degreasing efficiency. Because the surface of the cold-rolled substrate used in galvanizing lines differs significantly from that of continuous rolling mills, the current density of the electrolytic cleaning tank is generally controlled above the upper limit, i.e., within 10 A / dm³. 2 about.

[0050] In one embodiment, the cleaning time range of the cold-rolled substrate in the electrolytic cleaning tank is controlled by the automatic speed control module in the conveying speed control device. It is usually more than 10 seconds, and the specific time depends on the degree of contamination on the surface of the cold-rolled substrate.

[0051] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An inlet cleaning system for a Sendzimir modified galvanizing line, characterized in that, The cleaning system is located at the entrance of the Sendzimir modified galvanizing line and includes: An alkaline washing section is configured to perform alkaline washing on cold-rolled substrates on a Sendzimir modified galvanizing line. The alkaline washing section includes an alkaline washing tank and four sets of cleaning brush rollers, the four sets of cleaning brush rollers being evenly arranged along the length of the Sendzimir modified galvanizing line. An electrolytic cleaning section device, the electrolytic cleaning section device being configured to perform electrolytic cleaning on the cold-rolled substrate, the electrolytic cleaning section device including an electrolytic cleaning tank; The electrolytic cleaning section is located downstream of the alkaline cleaning section.

2. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 1, characterized in that, It also includes a steam generator, with the alkaline washing tank pipe connected to the steam generator and the electrolytic cleaning tank pipe connected to the steam generator.

3. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 2, characterized in that, It also includes multiple sets of drive rollers, a portion of which are evenly arranged in the alkaline washing tank and the electrolytic cleaning tank along the length of the Sendzimir modified galvanizing line, for carrying the cold-rolled substrate, and are configured to rotate to drive the cold-rolled substrate to move along the length of the Sendzimir modified galvanizing line.

4. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 3, characterized in that, It also includes a speed control device configured to control the rotational speed of the drive roller assembly, thereby changing the movement speed of the cold-rolled substrate on the Sendzimir modified galvanizing line.

5. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 3, characterized in that, The cleaning brush roller assembly is fixedly installed above the cold-rolled substrate.

6. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 1, characterized in that, The electrolytic cleaning section equipment also includes an electrolytic electrode, one end of which is disposed in the electrolyte of the electrolytic cleaning tank.

7. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 3, characterized in that, It also includes a rinsing section, which is located downstream of the electrolytic cleaning section. The rinsing section includes a rinsing tank and a spraying device. A portion of the multiple sets of drive rollers are evenly arranged in the rinsing tank along the length of the Sendzimir modified galvanizing line. The spraying device is positioned above the cold-rolled substrate, with the spray nozzles facing the cold-rolled substrate.

8. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 7, characterized in that, It also includes a squeezing section device, which is located downstream of the rinsing section device. The squeezing section device includes a squeezing trough and a squeezing roller group. A portion of the multiple drive roller groups are evenly arranged in the squeezing trough along the length direction of the Sendzimir modified galvanizing line. The squeezing roller group includes a pair of squeezing rollers located on both sides of the cold-rolled substrate.

9. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 8, characterized in that, It also includes a drying section, which is located downstream of the extrusion section. The drying section includes a drying chamber and a hot air device. A portion of the multiple sets of drive rollers are evenly arranged in the drying chamber along the length of the Sendzimir modified galvanizing line. The hot air device is configured to supply hot air into the drying chamber.

10. The inlet cleaning system for Sendzimir modified galvanizing lines as described in claim 7, characterized in that, The spray device is connected to the steam generator via a pipeline.

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