Strip steel rinsing device and rinsing method
By combining vertical and horizontal rinsing devices, an innovative process was achieved to achieve efficient and low-consumption strip rinsing, solving the problems of large rinsing solution consumption and electroplating solution loss in traditional methods, significantly reducing costs and improving cleaning efficiency.
Patent Information
- Application Number
- CN202511478547.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-01-09
AI Technical Summary
In the existing tin-plating production line strip rinsing process, the traditional vertical and horizontal rinsing methods cannot effectively clean the electroplating solution on the strip surface, resulting in the use of a large amount of rinsing solution and increased costs, and the loss of electroplating solution affects product quality.
The process employs a combination of vertical and horizontal rinsing devices. Vertical rinsing uses low-shear immersion cleaning, while horizontal rinsing uses high-speed rinsing. Combined with a three-stage countercurrent rinsing tank and rinsing water tank, it achieves dynamic balance and recycling of rinsing solution, reducing the amount of fresh water required.
It significantly reduced the amount of rinsing solution used, lowered costs, improved cleaning efficiency, reduced electroplating solution loss, enhanced product quality, and saved water resources and electroplating solution costs.
Smart Images
Figure CN121289162A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of strip steel washing technology, specifically relating to a strip steel washing device and washing method. Background Technology
[0002] Tinplate is made by plating a layer of pure tin onto both sides of cold-rolled low-carbon thin steel sheets. It is a product with high quality requirements, demanding production technology, and difficult manufacturing. It is widely used in food packaging, various containers, stamped products, and other industries.
[0003] To further increase production capacity, tin-plating units are gradually accelerating, resulting in a large amount of plating solution being carried out of the strip. Because the plating solution contains surface-active components, bubbling occurs in the rinsing section after plating. The current two-stage vertical or horizontal rinsing method used in tin-plating production lines cannot completely clean the plating solution from the surface of the strip, leading to a large amount of additional rinsing water to improve cleaning capacity. The evaporator cannot handle the large amount of plating solution loss in time, resulting in high costs. At the same time, the incomplete cleaning of plating solution will cause tin ash to form on the surface of the tin-plated sheet, affecting product quality. Summary of the Invention
[0004] To address the technical problem of high costs and large quantities of rinsing solution required for rinsing strip steel in current tin-plating production lines, this application provides a strip steel rinsing device and rinsing method.
[0005] In a first aspect of this application, a strip steel rinsing apparatus is provided, characterized in that it comprises: A vertical rinsing device includes a vertical tank and a first cleaning component disposed in the vertical tank. The vertical tank is provided with a first water inlet and a first water outlet, with the first water inlet located below the first water outlet. A horizontal rinsing device includes a rinsing tank assembly, a second cleaning component disposed in the rinsing tank assembly, and a main inlet and a main outlet disposed in the rinsing tank assembly. The main inlet and the main outlet are arranged along the strip conveying direction. The rinsing tank assembly includes one or more rinsing tanks. Each rinsing tank is provided with the second cleaning component. An overflow outlet is provided between adjacent rinsing tanks, and the height of the overflow outlet of adjacent rinsing tanks increases sequentially along the strip conveying direction. The rinsing water tank is provided with a second inlet, a third inlet, and a second outlet. The second inlet is connected to the main outlet, the third inlet is connected to the first outlet, and the second outlet is connected to the first inlet. The water supply end is connected to the main water inlet.
[0006] In some embodiments, the vertical rinsing device and the horizontal rinsing device are arranged sequentially along the strip conveying direction.
[0007] In some embodiments, the rinsing tank group includes a first-stage rinsing tank, a second-stage rinsing tank, and a third-stage rinsing tank, wherein the overflow outlet heights of the first-stage rinsing tank, the second-stage rinsing tank, and the third-stage rinsing tank increase sequentially.
[0008] In some embodiments, the strip rinsing device further includes an evaporator and a replenishment pump, and the rinsing water tank is also provided with a third outlet; the third outlet is connected to the evaporator through a pipeline, and the replenishment pump is located on the connected pipeline.
[0009] In some embodiments, the first cleaning assembly includes a submerged roller, a deflector roller, and a pressure roller rotatably connected to the vertical tank; The submerged roller is located at the bottom of the vertical trough and is used to transport the strip steel from the top of the vertical trough to the bottom of the vertical trough. The steering roller and the pressure roller are located at the top of the vertical trough and are used to transport the strip steel from the vertical trough to the rinsing tank group.
[0010] In some embodiments, the submerged roller and / or the steering roller are rubber rollers, and the pressure roller is a flat roller; the diameter of the steering roller is larger than the diameter of the submerged roller. Alternatively, the submerged roller, the steering roller, and the pressure roller are all made of Hypalon material.
[0011] In some embodiments, the second cleaning assembly includes a cleaning spray beam and nozzles disposed on the cleaning spray beam. The cleaning spray beam is connected to the rinsing liquid in the corresponding rinsing tank via a pipeline, and a circulation pump is provided on the connecting pipeline.
[0012] In some embodiments, a return tank is provided downstream of the first-stage rinsing tank, and a replenishment tank is provided upstream of the third-stage rinsing tank. The outlet of the first-stage rinsing tank is connected to the return tank, and the main outlet is located in the return tank. The inlet of the third-stage rinsing tank is connected to the replenishment tank, and the main water inlet is located in the replenishment tank.
[0013] In some embodiments, at least one squeeze roller is provided above the junction of the first-stage rinsing tank and the return tank, above the junction of the first-stage rinsing tank and the second-stage rinsing tank, above the junction of the second-stage rinsing tank and the third-stage rinsing tank, and above the return tank. And / or, the extrusion roller is a flat roller, and the extrusion roller is made of Hypalon material. In a second aspect of this application, a rinsing method based on the above-described strip rinsing apparatus is provided, characterized by comprising the following steps: The rinsing solution from the water supply end is delivered to the rinsing tank group through the main inlet of the rinsing tank group; the rinsing solution flows through the rinsing tank with the highest opening in the rinsing tank group, and overflows sequentially to the adjacent rinsing tanks until it flows through the main outlet. The rinsing solution is transported from the main outlet of the rinsing tank assembly to the second inlet of the rinsing water tank. The rinsing solution is transported from the second outlet of the rinsing tank to the first inlet of the vertical tank until the rinsing solution is stored in the vertical tank until it overflows from the first outlet and flows into the rinsing tank through the third inlet. The strip steel is conveyed sequentially through the vertical rinsing device and the horizontal rinsing device. First, the first cleaning component is opened for vertical cleaning, and then the second cleaning component is opened for horizontal cleaning.
[0014] According to one or more embodiments of this application, a strip steel rinsing device and rinsing method are provided. The strip steel rinsing device includes a vertical rinsing device, a horizontal rinsing device, a rinsing water tank, and a water supply end. The vertical rinsing device includes a vertical tank and a first cleaning component disposed in the vertical tank. The vertical tank has a first water inlet and a first water outlet, with the first water inlet located below the first water outlet. The horizontal rinsing device includes a rinsing tank assembly, a second cleaning component disposed in the rinsing tank assembly, and a main water inlet and a main water outlet disposed in the rinsing tank assembly. The main inlet and main outlet are set along the strip conveying direction; the rinsing tank group includes one or more rinsing tanks, each rinsing tank is equipped with a second cleaning component, and there are overflow outlets between adjacent rinsing tanks, and the height of the overflow outlets of adjacent rinsing tanks increases sequentially along the strip conveying direction; the rinsing water tank is equipped with a second inlet, a third inlet and a second outlet, the second inlet is connected to the main outlet, the third inlet is connected to the first outlet, and the second outlet is connected to the first inlet; the water supply end is connected to the main inlet.
[0015] Therefore, the steel strip first enters a vertical tank for immersion cleaning. The vertical rinsing process effectively removes 55% to 60% of the electroplating solution residue from the surface through gentle physical wetting. Since vertical rinsing mainly involves immersion cleaning, the low-turbulence environment dominated by laminar flow in vertical rinsing results in significantly lower shear stress than traditional processes. This low shear force characteristic reduces foam generation by more than 60% compared to traditional processes. Therefore, performing vertical rinsing first fundamentally avoids the foam overflow and nozzle clogging problems that are prone to occur during subsequent high-pressure rinsing in horizontal tanks, allowing the horizontal tank to fully utilize its high-speed rinsing advantages. Attached Figure Description
[0016] Figure 1 A schematic diagram of the strip rinsing apparatus in one or more embodiments of this application is shown.
[0017] Figure 2 It shows Figure 1 A schematic diagram of the structure of a vertical rinsing device.
[0018] Figure 3 It shows Figure 1 A schematic diagram of the structure of a horizontal rinsing device.
[0019] Explanation of reference numerals in the attached drawings: 100 - Strip rinsing device; 110 - Vertical rinsing device; 111 - Vertical tank; 112 - First cleaning component; 1121 - Submerged roller; 1122 - Diverting roller; 1123 - Pressure roller; 113 - First inlet; 114 - First outlet; 120 - Horizontal rinsing device; 121 - First-stage rinsing tank; 122 - Second-stage rinsing tank; 123 - Third-stage rinsing tank; 12... 4-Main water inlet, 125-Main water outlet, 126-Replenishment tank, 127-Return tank, 128-Second cleaning assembly, 1281-Cleaning spray beam, 1282-Nozzle, 129-Squeeze roller, 130-Rinse water tank, 131-Second water inlet, 132-Third water inlet, 133-Second water outlet; 140-Evaporator, 141-Replenishment pump, 150-Water supply end, 200-Electroplating device. Detailed Implementation
[0020] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0021] In existing technologies, the rinsing process used in tin plating units is mainly vertical tank rinsing, typically using two vertical tanks in combination. The tank at the outlet side is replenished with fresh water, while the second tank recycles the rinsing water from the outlet side tank. A guide roller and a pressure roller are installed between the two tanks to reduce solution carryover from the strip, preventing cross-contamination. The vertical design allows the strip to move quickly in the vertical direction, achieving thorough immersion and cleaning within the tank. Vertical rinsing involves immersing and cleaning the strip within the tank. In the commonly used method of using two vertical tanks in combination, fresh water is replenished to the outlet side tank, while the inlet tank uses the rinsing water from the outlet side tank. Due to the two-stage rinsing method, the concentration difference of the rinsing water within the tanks is small, and the rinsing ability of physical immersion alone is weak. To ensure cleaning capacity, the amount of fresh water replenished is usually increased; otherwise, a large amount of residual electroplating solution remains on the strip surface, leading to high costs.
[0022] To address the high cost of vertical rinsing in existing technologies, tin plating units employ a horizontal rinsing method for strip steel after plating. This typically involves three horizontal rinsing tanks connected together, with the strip steel passing through the center of each tank. Each tank is equipped with two pairs of rinsing spray beams at the top and bottom, and pressure rollers are installed between the tanks. A three-stage rinsing process is used to clean the strip steel. The rinsing water from the previous tank is pumped into the spray beams for horizontal rinsing using a circulating pump. This high-pressure rinsing method is more efficient and therefore more water-saving than vertical tanks. However, the horizontal rinsing method using spray beams to rinse the strip steel has drawbacks. Because the electroplating solution in the rinsing water contains tin ions, these ions easily hydrolyze and form tin sludge upon leaving the pickling environment, clogging the spray beams and significantly affecting cleaning efficiency. Furthermore, the electroplating solution contains surface-active ingredients, which can cause bubbling during the high-pressure rinsing of the strip steel surface by the spray beams, resulting in the loss of effective components. In existing technologies, if only vertical or horizontal rinsing is used, the rinsing water replenishment volume needs to be 5 to 7 cubic meters per hour, requiring a large amount of rinsing solution. Therefore, this application provides a strip steel rinsing device and rinsing method.
[0023] Please see Figure 1 , Figure 2 and Figure 3 According to a first aspect of this application, a strip steel rinsing device 100 is provided, including a vertical rinsing device 110, a horizontal rinsing device 120, a rinsing water tank 130, and a water supply end 150. The vertical rinsing device 110 includes a vertical tank 111 and a first cleaning component 112 disposed in the vertical tank 111. The vertical tank 111 is provided with a first water inlet 113 and a first water outlet 114, with the first water inlet 113 located below the first water outlet 114. The horizontal rinsing device 120 includes a rinsing tank assembly, a second cleaning component 128 disposed in the rinsing tank assembly, and a main water inlet 124 and a main water outlet 125 disposed in the rinsing tank assembly. The main outlet 124 and the main outlet 125 are arranged along the strip steel conveying direction; the rinsing tank group includes more than one rinsing tank, each rinsing tank is equipped with a second cleaning component 128, and an overflow outlet is provided between adjacent rinsing tanks, and the height of the overflow outlet of adjacent rinsing tanks increases sequentially along the strip steel conveying direction; the rinsing water tank 130 is provided with a second inlet 131, a third inlet 132 and a second outlet 133, the second inlet 131 is connected to the main outlet 125, the third inlet 132 is connected to the first outlet 114, and the second outlet 133 is connected to the first inlet 113; the water supply end 150 is connected to the main inlet 124.
[0024] Fresh water from the water supply end 150 enters the rinsing tank group through the main inlet 124, then overflows through the overflow outlet in stages, and finally flows out from the main outlet 125 to the rinsing water tank 130. The rinsing liquid in the rinsing water tank 130 is sent to the vertical tank 111. When the height of the vertical tank 111 reaches the height of the first outlet 114 of the vertical tank 111, the rinsing liquid in the vertical tank 111 can overflow through the first outlet 114 to the third inlet 132 of the rinsing water tank 130, thereby transferring the rinsing liquid after rinsing in the vertical tank 111 to the rinsing water tank 130. The height of the first outlet 114 of the vertical tank 111 is greater than the height of the first inlet 113. After the rinsing liquid in the vertical tank 111 overflows through the first outlet 114, the rinsing liquid stored in the vertical tank 111 can reach dynamic equilibrium, and the rinsing tanks of the rinsing tank group also reach dynamic equilibrium, thereby reducing the water supply at the water supply end 150. Compared with the prior art where the rinsing replenishment water volume for strip steel rinsing process is 5-7 cubic meters / hour, the rinsing process adopted in this application only requires 3-4 cubic meters / hour to meet the requirements, thereby reducing the supply of rinsing liquid per unit time to a certain extent.
[0025] In this application, the rinsing solution first replenishes the horizontal rinsing overflow tank with fresh water through the water supply end 150, and then overflows to the rinsing tank with the lowest overflow tank, before flowing into the rinsing water tank 130. The vertical rinsing tank uses the solution in the rinsing water tank 130 to clean the steel strip without adding any fresh water. The solution in the rinsing water tank 130 is pumped into the vertical tank 111 by a water pump for circulating soaking and cleaning.
[0026] Therefore, the strip steel first enters the vertical tank 111 for immersion cleaning. The vertical rinsing process effectively removes 55% to 60% of the electroplating solution residue from the surface through gentle physical wetting. Since vertical rinsing mainly involves immersion cleaning, the low-turbulence environment dominated by laminar flow in vertical rinsing results in significantly lower shear stress than traditional processes. This low shear force characteristic reduces foam generation by more than 60% compared to traditional processes. Therefore, performing vertical rinsing first fundamentally avoids the foam overflow and nozzle 1282 clogging problems that are prone to occur during subsequent high-pressure rinsing in the horizontal tank, allowing the horizontal tank to fully utilize its high-speed rinsing advantages.
[0027] In some embodiments, the vertical rinsing device 110 and the horizontal rinsing device 120 are arranged sequentially along the strip conveying direction. That is, the strip is first vertically rinsed in the vertical rinsing device 110 and then horizontally rinsed in the horizontal rinsing device 120.
[0028] In some embodiments, the rinsing tank assembly includes a first-stage rinsing tank 121, a second-stage rinsing tank 122, and a third-stage rinsing tank 123, with the overflow outlet heights of the first-stage rinsing tank 121, the second-stage rinsing tank 122, and the third-stage rinsing tank 123 increasing sequentially. The first-stage rinsing tank 121 has a first overflow outlet, the second-stage rinsing tank 122 has a second overflow outlet, and the third-stage rinsing tank 123 has a third overflow outlet. The height of the third overflow outlet is higher than the height of the second overflow outlet, and the height of the second overflow outlet is higher than the height of the first overflow outlet. When water is added to the rinsing tank assembly, the rinsing solution first enters through the main inlet 124 of the rinsing tank assembly, and then enters the third-stage rinsing tank 123. When the water level of the rinsing solution in the third-stage rinsing tank 123 reaches the third overflow outlet, the rinsing solution in the third-stage rinsing tank 123 overflows into the second-stage rinsing tank 122. When the water level of the rinsing solution in the second-stage rinsing tank 122 reaches the second overflow outlet, the rinsing solution in the second-stage rinsing tank 122 overflows into the first-stage rinsing tank 121. New water is added to the replenishment tank 126, and the overflow is added to the third-stage rinsing tank 123, gradually overflowing into the second-stage rinsing tank 122 and the first-stage rinsing tank 121, and finally overflowing into the rinsing water tank 130 to achieve three-stage countercurrent rinsing, which greatly saves water consumption.
[0029] In some embodiments, the strip steel undergoes three stages of rinsing from the inlet to the outlet of the horizontal tank: a first-stage rinsing tank 121 and a third-stage rinsing tank. The first-stage rinsing tank 121 has the smallest volume, ranging from 1.8 to 2.3 cubic meters, and can be 1.8 cubic meters, 2 cubic meters, or 2.3 cubic meters. The second-stage rinsing tank 122 has a volume of 2.5 to 3 cubic meters, and can be 2.5 cubic meters, 2.8 cubic meters, or 3 cubic meters. The third-stage rinsing tank 123 has a volume of 3.8 to 4.2 cubic meters, and can be 3.8 cubic meters, 4 cubic meters, or 4.2 cubic meters. The height difference between each rinsing tank stage is 25 to 35 cm, and can be 30 cm.
[0030] In some embodiments, the volumes of the first-stage rinsing tank 121, the second-stage rinsing tank 122, and the third-stage rinsing tank 123 increase sequentially. The rinsing tank group can be a rectangular tank, which is divided into the first-stage rinsing tank 121, the second-stage rinsing tank 122, and the third-stage rinsing tank 123 by adding multiple partitions in the rectangular tank.
[0031] In some embodiments, the strip rinsing device 100 further includes an evaporator 140 and a replenishment pump 141, and the rinsing water tank 130 is also provided with a third outlet; the third outlet is connected to the evaporator 140 through a pipeline, and the replenishment pump 141 is located on the connected pipeline. The rinsing water in the rinsing water tank 130 is evaporated by the evaporator 140, and the concentrated liquid after evaporation enters the electroplating circulation tank for recycling. The condensate after evaporation is used to replenish the rinsing tank group with new water. The entire process achieves 100% recycling and does not generate any waste liquid.
[0032] In some embodiments, the first cleaning assembly 112 includes a submerged roller 1121, a guide roller 1122, and a pressure roller 1123 rotatably connected to the vertical tank 111. The submerged roller 1121 is located at the bottom of the vertical tank 111 and is used to convey the strip steel from the top of the vertical tank 111 to the bottom of the vertical tank 111. The guide roller 1122 and the pressure roller 1123 are located at the top of the vertical tank 111 and are used to convey the strip steel from the vertical tank 111 to the rinsing tank assembly. The dimensions of the vertical tank 111 can be: 1050mm long × 2400mm wide × 3900mm high, which is consistent with the dimensions of the electroplating section tank in the previous process, reducing manufacturing costs. Through the combined action of the submerged roller 1121, the turning roller 1122 and the pressure roller 1123 in the vertical tank 111, the strip steel can be immersed and cleaned in the vertical tank 111. The vertical rinsing process can effectively remove 55% to 60% of the electroplating solution residue on the surface through gentle physical wetting.
[0033] In some embodiments, the submerged roller 1121 and / or the guide roller 1122 are rubber rollers, and the pressure roller 1123 is a flat roller; the diameter of the guide roller 1122 is larger than the diameter of the submerged roller 1121; the materials of the submerged roller 1121, the guide roller 1122, and the pressure roller 1123 are all Hypalon material. The submerged roller 1121 and the guide roller 1122 can be Hypalon rubber rollers with a radius of 0.3 and an effective length of 1400mm to prevent the strip from deviating in the vertical trough 111. The diameter of the submerged roller 1121 is 460mm, the diameter of the guide roller 1122 is 610mm, and the pressure roller 1123 is a flat roller made of Hypalon material with a diameter of 255mm, a hardness of 80±5 (Shore hardness), and a pressure of 3-5 kg. The low-hardness pressure roller 1123 can effectively reduce the amount of rinsing liquid carried into the horizontal trough under high pressure conditions. The vertical rinsing trough uses a rinsing water tank 130 for solution circulation cleaning.
[0034] In some embodiments, the second cleaning assembly 128 includes a cleaning spray beam 1281 and nozzles 1282 disposed on the cleaning spray beam 1281. The cleaning spray beam 1281 is connected to the rinsing liquid in the corresponding rinsing tank through a pipeline, and a circulation pump is provided on the connecting pipeline. Each rinsing tank has two pairs of cleaning spray beams 1281 above it, one above the other. The rinsing water is pressurized by the circulation pump of each tank to rinse the upper and lower surfaces of the strip steel. Each spray beam has an effective length of 1400mm and four nozzles 1282 are evenly distributed. The nozzles 1282 have a diameter of 3-5mm and the pump pressure is 4-6 kg, which can meet the cleaning range of tinplate with a width of more than one meter.
[0035] In some embodiments, a return tank 127 is provided downstream of the first-stage rinsing tank 121, and a replenishment tank 126 is provided upstream of the third-stage rinsing tank 123; the outlet of the first-stage rinsing tank 121 is connected to the return tank 127, and the main outlet 125 is provided in the return tank 127; the inlet of the third-stage rinsing tank 123 is connected to the replenishment tank 126, and the main inlet 124 is provided in the replenishment tank 126. A 0.5 cubic meter return tank 127 is provided downstream of the first-stage rinsing tank 121, that is, a return tank 127 is provided between the first-stage rinsing tank 121 and the vertical tank 111; a 0.5 cubic meter replenishment tank 126 is provided upstream of the third-stage rinsing tank 123, that is, a replenishment tank 126 is provided between the third-stage rinsing tank 123 and the water supply end 150; the replenishment tank 126 can store the liquid from the water supply end 150, and then the newly added water from the replenishment tank 126 overflows into the third-stage rinsing tank 123 through the overflow; a return tank 127 is also provided between the first-stage rinsing tank 121 and the vertical tank 111, which can collect the residual liquid of the strip steel after vertical rinsing, and then the return tank 127 can be connected to the rinsing water tank 130 for reuse, thereby saving rinsing liquid.
[0036] In some embodiments, at least one squeeze roller 129 is provided above the junction of the first-stage rinsing tank 121 and the return tank 127, above the junction of the first-stage rinsing tank 121 and the second-stage rinsing tank 122, above the junction of the second-stage rinsing tank 122 and the third-stage rinsing tank 123, and above the return tank 127. The squeeze roller 129 is a flat roller made of Hypalon material. A pair of squeeze rollers 129 are provided between the tanks to grade and squeeze out the strip steel. The squeeze rollers 129 are flat rollers made of Hypalon material with a diameter of 300mm, a hardness of 80±5 (Shore hardness), and a pressure of 3-5 kg. Fresh water is replenished from the third-stage rinsing tank 123, gradually overflowing into the second-stage and first-stage rinsing tanks, and finally overflowing into the rinsing water tank 130 to achieve three-stage countercurrent rinsing, which greatly saves water consumption.
[0037] In a second aspect of this application, a rinsing method based on the above-described strip rinsing apparatus 100 is provided, comprising the following steps: S100: The rinsing liquid from the water supply end 150 is delivered to the rinsing tank group through the main inlet 124 of the rinsing tank group; the rinsing liquid flows through the rinsing tank with the highest opening in the rinsing tank group, and overflows to the adjacent rinsing tanks in sequence until it flows through the main outlet 125. Understandably, the fresh water from the water supply end 150 first enters the third-stage rinsing tank 123, then overflows from the third-stage rinsing tank 123 to the second-stage rinsing tank 122, and from the second-stage rinsing tank 122 to the first-stage rinsing tank 121. The first-stage rinsing tank 121 flows out from the main outlet 125. Since the strip steel passes through the first-stage rinsing tank 121, the second-stage rinsing tank 122, and the third-stage rinsing tank 123 in sequence, the cleanliness of the rinsing solution in the third-stage rinsing tank 123 is greater than that in the second-stage rinsing tank 122, and the cleanliness of the rinsing solution in the second-stage rinsing tank 122 is greater than that in the first-stage rinsing tank 121.
[0038] S200: The rinsing solution is transported from the main outlet 125 of the rinsing tank assembly to the second inlet 131 of the rinsing water tank 130; It is understandable that the rinsing liquid from the main outlet 125 of the rinsing tank assembly, i.e. the first-stage rinsing tank 121, is transported to the rinsing water tank 130. It can be stored in the rinsing water tank 130 or supplied to the vertical tank 111 for rinsing. The rinsing water tank 130 serves the function of storage or transfer.
[0039] S300: The rinsing solution is transported through the second outlet 133 of the rinsing water tank 130 to the first inlet 113 of the vertical tank 111 until the rinsing solution is stored in the vertical tank 111 until it overflows from the first outlet 114 and flows into the rinsing water tank 130 through the third inlet 132. Understandably, the rinsing solution in the rinsing tank 130 is sent to the vertical tank 111. Once the height of the vertical tank 111 reaches the height of its first outlet 114, the rinsing solution in the vertical tank 111 overflows through the first outlet 114 to the third inlet 132 of the rinsing tank 130, thus transferring the rinsing solution from the vertical tank 111 to the rinsing tank 130. The height of the first outlet 114 of the vertical tank 111 is greater than the height of the first inlet 113. After the rinsing solution in the vertical tank 111 overflows through the first outlet 114, the rinsing solution stored in the vertical tank 111 can reach a dynamic balance. The first-stage rinsing tank 121, the second-stage rinsing tank 122, and the third-stage rinsing tank 123 of the rinsing tank assembly also reach a dynamic balance, thereby reducing the water supply at the water supply end 150. Compared to the existing technology where the strip rinsing process requires 5 to 7 cubic meters of water per hour, the rinsing process adopted in this application only requires 3 to 4 cubic meters of water per hour, thereby reducing the amount of rinsing solution supplied per unit time to a certain extent.
[0040] S400: The strip steel is conveyed sequentially through the vertical rinsing device 110 and the horizontal rinsing device 120. First, the first cleaning component 112 is opened for vertical cleaning, and then the second cleaning component 128 is opened for horizontal cleaning.
[0041] Understandably, after both the vertical tank 111 and the horizontal tank have stored a dynamically balanced rinsing solution, vertical cleaning can be performed by opening the first cleaning component 112, and then horizontal cleaning can be performed by opening the second cleaning component 128.
[0042] Therefore, the rinsing solution used in vertical rinsing has the lowest cleanliness, while the rinsing solution in the final stage of horizontal rinsing has the highest cleanliness. That is, the initial rinsing in vertical rinsing is performed with rinsing solution that has been used for multiple rinses, and then rinsing is performed in stages with rinsing solutions of progressively increasing cleanliness. The vertical rinsing process can effectively remove 55% to 60% of the electroplating solution residue on the surface through gentle physical wetting. Then, horizontal rinsing is performed, which avoids the foam overflow and nozzle 1282 clogging problems that are prone to occur during the high-pressure rinsing of the horizontal tank. This allows the horizontal tank to give full play to its high-speed rinsing advantage, thereby improving rinsing efficiency.
[0043] The strip rinsing method of this application involves the strip first undergoing preliminary cleaning in a vertical tank 111 after exiting the electroplating tank, followed by three-stage horizontal rinsing. The third-stage horizontal rinsing tank 123 is replenished with new water, which overflows into the rinsing water tank 130. The vertical rinsing uses the rinsing water in the rinsing water tank 130 for circulating cleaning, which can achieve the cleaning capacity of a high-speed tin plating unit.
[0044] This application also has the following technical effects: 1) The solution employs an innovative process combining vertical tank 111 and horizontal tank for immersion cleaning. The strip steel first enters vertical tank 111 for immersion cleaning. This process effectively removes 58% of the electroplating solution residue from the surface through gentle physical wetting, and its low shear force reduces foam generation by more than 60% compared to traditional processes. This pretreatment fundamentally avoids the foam overflow and nozzle 1282 clogging problems that easily occur during subsequent high-pressure rinsing in the horizontal tank, allowing the horizontal tank to fully utilize its high-speed rinsing advantages. Through the complementary and synergistic effect of the two-stage cleaning mechanisms, a low-consumption, high-efficiency composite cleaning system with 60% improved foam control and first-class cleaning efficiency is achieved, suitable for high-speed tin plating units operating at 500 meters per minute.
[0045] 2) This technical solution can significantly reduce the water consumption for post-plating rinsing, which is only 37% to 50% of the existing vertical or horizontal rinsing processes. It saves 3-5 cubic meters of water per hour and 35,000 cubic meters of water per year, which translates to an economic benefit of approximately RMB 396,000 per year. 3) This solution can significantly reduce the cost of electroplating solution by the following two points: the combined rinsing method can deeply clean the electroplating solution on the surface of the strip steel, reducing the deposition of electroplating solution on the surface of the strip steel, and the conductivity of the final rinsing water can be maintained below 40 μS / cm; at the same time, because the amount of water replenished after rinsing is small, the electroplating evaporator 140 can completely treat the rinsing water, reducing the loss of electroplating solution in the rinsing water. The above two points can save 4 yuan per ton of steel in electroplating solution cost. Taking a tin plating plant with an annual output of 540,000 tons as an example, the annual cost saving is 2.16 million yuan.
[0046] 4) In summary, this technical solution can achieve annual cost savings of 2.556 million yuan, and at the same time, it fundamentally solves the problem of bubbling in the rinsing section after plating in high-speed tin plating units.
[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0049] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0051] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A strip steel rinsing device, characterized in that, include: A vertical rinsing device includes a vertical tank and a first cleaning component disposed in the vertical tank. The vertical tank is provided with a first water inlet and a first water outlet, with the first water inlet located below the first water outlet. A horizontal rinsing device includes a rinsing tank assembly, a second cleaning component disposed in the rinsing tank assembly, and a main inlet and a main outlet disposed in the rinsing tank assembly. The main inlet and the main outlet are arranged along the strip conveying direction. The rinsing tank assembly includes one or more rinsing tanks. Each rinsing tank is provided with the second cleaning component. An overflow outlet is provided between adjacent rinsing tanks, and the height of the overflow outlet of adjacent rinsing tanks increases sequentially along the strip conveying direction. The rinsing water tank is provided with a second inlet, a third inlet, and a second outlet. The second inlet is connected to the main outlet, the third inlet is connected to the first outlet, and the second outlet is connected to the first inlet. The water supply end is connected to the main water inlet.
2. The strip steel rinsing apparatus according to claim 1, characterized in that, The vertical rinsing device and the horizontal rinsing device are arranged sequentially along the strip conveying direction.
3. The strip steel rinsing apparatus according to claim 1, characterized in that, The rinsing tank assembly includes a first-stage rinsing tank, a second-stage rinsing tank, and a third-stage rinsing tank, with the overflow outlet heights of the first-stage rinsing tank, the second-stage rinsing tank, and the third-stage rinsing tank increasing sequentially.
4. The strip steel rinsing apparatus according to claim 1, characterized in that, The strip steel rinsing device also includes an evaporator and a replenishing pump, and the rinsing water tank is also provided with a third outlet; the third outlet is connected to the evaporator through a pipeline, and the replenishing pump is located on the connected pipeline.
5. The strip steel rinsing apparatus according to any one of claims 1-4, characterized in that, The first cleaning assembly includes a submerged roller, a deflector roller, and a pressure roller that are rotatably connected to the vertical tank; The submerged roller is located at the bottom of the vertical trough and is used to transport the strip steel from the top of the vertical trough to the bottom of the vertical trough. The steering roller and the pressure roller are located at the top of the vertical trough and are used to transport the strip steel from the vertical trough to the rinsing tank group.
6. The strip steel rinsing apparatus according to claim 5, characterized in that, The submerged roller and / or the steering roller are rubber rollers, and the pressure roller is a flat roller; the diameter of the steering roller is larger than the diameter of the submerged roller; Alternatively, the submerged roller, the steering roller, and the pressure roller are all made of Hypalon material.
7. The strip steel rinsing apparatus according to any one of claims 1-4, characterized in that, The second cleaning assembly includes a cleaning spray beam and nozzles disposed on the cleaning spray beam. The cleaning spray beam is connected to the rinsing liquid in the corresponding rinsing tank through a pipeline, and a circulation pump is provided on the connecting pipeline.
8. The strip steel rinsing apparatus according to claim 3, characterized in that, A return tank is provided downstream of the first-stage rinsing tank, and a replenishment tank is provided upstream of the third-stage rinsing tank. The outlet of the first-stage rinsing tank is connected to the return tank, and the main outlet is located in the return tank. The inlet of the third-stage rinsing tank is connected to the replenishment tank, and the main water inlet is located in the replenishment tank.
9. The strip steel rinsing apparatus according to claim 8, characterized in that, At least one of the following locations is provided: above the junction of the first-stage rinsing tank and the return tank, above the junction of the first-stage rinsing tank and the second-stage rinsing tank, above the junction of the second-stage rinsing tank and the third-stage rinsing tank, and above the return tank. And / or, the extrusion roller is a flat roller, and the extrusion roller is made of Hypalon material.
10. A rinsing method based on the strip rinsing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: The rinsing solution from the water supply end is delivered to the rinsing tank group through the main inlet of the rinsing tank group; the rinsing solution flows through the rinsing tank with the highest opening in the rinsing tank group, and overflows sequentially to the adjacent rinsing tanks until it flows through the main outlet. The rinsing solution is transported from the main outlet of the rinsing tank assembly to the second inlet of the rinsing water tank. The rinsing solution is transported from the second outlet of the rinsing tank to the first inlet of the vertical tank until the rinsing solution is stored in the vertical tank until it overflows from the first outlet and flows into the rinsing tank through the third inlet. The strip steel is conveyed sequentially through the vertical rinsing device and the horizontal rinsing device. First, the first cleaning component is opened for vertical cleaning, and then the second cleaning component is opened for horizontal cleaning.