Groove crossing prevention and control system for pretreatment process of steel product coating production line

Abstract

The utility model discloses a channeling prevention and control system for a pretreatment process of a steel product coating production line, which comprises a plurality of functional areas including a degreasing area, a washing area and a vitrification area; the transition areas and the water storage devices are arranged corresponding to the functional areas, the transition areas are located between the adjacent functional areas, and the water storage devices are communicated with the corresponding transition areas and the functional areas respectively. According to the utility model, the transition area is arranged between the adjacent functional areas, and each functional area is provided with the water storage device communicated with the transition area and the functional area, so that the problem of'channeling 'in the pretreatment process of the steel product coating production line is effectively solved. And the transition area can collect the solution brought out from the previous functional area by the steel product and prevent the solution from entering the next functional area, so that the mixing of the treatment liquids with different chemical properties is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel product coating technical field especially relates to a steel product coating production line pretreatment procedure's string groove prevention and control system. BACKGROUND

[0002] In the steel product coating production line, the pretreatment procedure is the key link of ensuring the coating quality. The procedure usually includes hot water washing, pre - degreasing, main degreasing, washing, pure water washing and ceramization etc. However, in the actual production, because the steel product is hung on the rotary line, rotates through each procedure unit one by one, in the steel product circulation process, can not clean up the water that the steel product remains in each different area in time, and enters the next cleaning environment with the steel product itself. Such phenomenon, which is called " string groove " in the industry.

[0003] " String groove " phenomenon can cause the mixing of treatment liquid with different chemical properties, not only affect the steel product quality, also cause the waste of reagent and increase the burden of sewage treatment. " String groove " mainly occurs between adjacent procedures, especially when the consequence caused by appearing between degreasing tank and ceramization tank is most obvious. Because the degreasing liquid is alkaline (pH 9.5-11), and the ceramization liquid is acidic (pH 4.5-5.5), their mixing can cause reagent failure and pH value out of control. This can directly lead to rust marks and other quality problems on the surface of the steel product. Therefore, an urgent need for a solution to reduce the string groove phenomenon. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of steel product coating production line pretreatment procedure's string groove prevention and control system, to reduce string groove phenomenon, and can reduce reagent waste and reduce the burden of sewage treatment.

[0005] The purpose of the utility model can be achieved by adopting the following technical scheme:

[0006] A kind of steel product coating production line pretreatment procedure's string groove prevention and control system, comprising:

[0007] Multiple functional areas, the functional area includes degreasing area, washing area and ceramization area;

[0008] The transition area and water storage device corresponding to each functional area are provided, wherein the transition area is located between adjacent functional areas, and the water storage device is communicated with the corresponding transition area and functional area.

[0009] Among them, the water storage device is a tank structure, the tank is communicated with the transition area by recovery pipeline, and is communicated with the functional area by backflow pipeline.

[0010] The liquid outlet end of the recovery pipeline and the liquid inlet end of the backflow pipeline are both arranged in the tank body, and the liquid outlet end of the recovery pipeline is arranged at a position lower than the liquid inlet end of the backflow pipeline.

[0011] The tank body is connected with a wastewater discharge pipeline.

[0012] The wastewater discharge pipeline comprises a collecting section arranged in the tank body and a conveying section arranged outside the tank body, and a plurality of liquid inlets are arranged along the length direction of the collecting section, and the distribution direction of the liquid inlets is the same as the length direction of the tank body.

[0013] The recovery pipeline, the backflow pipeline and the wastewater discharge pipeline are respectively provided with booster pumps.

[0014] The water storage device communicated with the water washing area is provided with an electric conductivity detection device.

[0015] The water storage devices communicated with the degreasing area and the ceramization area are respectively provided with pH detection devices.

[0016] The system further comprises a conveying device for making the steel product pass through each functional area and a transition area between adjacent functional areas.

[0017] The beneficial technical effects of the utility model are as follows:

[0018] The utility model discloses a transition area is arranged between adjacent functional areas, and a water storage device communicated with the transition area and the functional area is arranged for each functional area, and the "slotting" problem in the pretreatment process of the steel product coating production line is effectively solved. The transition area can collect the solution brought out by the steel product from the previous functional area, prevents the solution from entering the next functional area, and thus avoids the mixing of different chemical property processing liquids. The water storage device realizes the collection and backflow of the solution, and effectively improves the resource utilization rate. The design not only significantly improves the coating quality of the steel product, but also reduces the reagent waste, reduces the sewage treatment burden, and realizes the double optimization of production efficiency and environmental protection. DRAWINGS

[0019] Figure 1 It is a slotting prevention and control system schematic diagram of the utility model embodiment;

[0020] Figure 2 It is a degreasing area schematic diagram of the slotting prevention and control system of the utility model embodiment;

[0021] Figure 3 It is a water storage device and sewage treatment station schematic diagram of the slotting prevention and control system of the utility model embodiment;

[0022] Figure 4 It is a degreasing area schematic diagram of the slotting prevention and control system of the utility model embodiment;

[0023] Figure 5 Figure 1 is a schematic diagram of a water washing area of a slotting prevention system according to an embodiment of the present application;

[0024] Figure 6 Figure 2 is a schematic diagram of a water storage device and pipelines thereof of the slotting prevention system according to an embodiment of the present application.

[0025] Legend:

[0026] In the figure: 10 - degreasing area, 11 - pre-degreasing tank, 12 - main degreasing tank, 20 - water washing area, 21 - first water washing area, 22 - second water washing area, 30 - ceramization area, 40 - transition area, 50 - water storage device, 51 - recovery pipeline, 511 - liquid outlet end, 52 - reflux pipeline, 521 - liquid inlet end, 53 - wastewater discharge pipeline, 531 - collection section, 532 - conveying section, 533 - liquid inlet, 54 - sewage treatment station, 60 - conductivity detection device, 70 - pH detection device, 80 - conveying device. DETAILED DESCRIPTION

[0027] To make the skilled in the art more clear and explicit technical scheme of the present application, the following embodiments and the present application are described in further detail with reference to the accompanying drawings, but the embodiments of the present application are not limited thereto.

[0028] As shown in Figures 1-6 The slotting prevention system for the pretreatment process of the steel product coating production line provided by the present embodiment includes multiple functional areas, a transition area 40, and a water storage device 50.

[0029] The functional areas include a degreasing area 10, a water washing area 20, and a ceramization area 30. These functional areas are arranged in sequence according to the requirements of the pretreatment process of the steel product coating production line, and are used for cleaning and chemically treating the surface of the steel product.

[0030] The transition area 40 is arranged between adjacent functional areas, and is used for collecting the solution carried out of the previous functional area by the steel product, so as to prevent the solution from entering the next functional area, thereby avoiding the slotting phenomenon. One transition area 40 is arranged corresponding to each functional area.

[0031] The water storage device 50 is in communication with the corresponding transition area 40 and functional area. The water storage device 50 is used for temporarily storing the solution collected by the transition area 40, so as to reflux the solution to the functional area, thereby realizing the recycling of the solution.

[0032] Through the above design, the system can effectively reduce the slotting phenomenon, improve the coating quality of the steel product, and at the same time, realize the efficient use of resources through solution recycling, thereby reducing the production cost and environmental pollution.

[0033] In the embodiment, when the steel product passes through the corresponding functional zone, it will stay above the transition zone 40 between the two functional zones for a certain period of time before entering the next functional zone. This staying process enables the solution in the last functional zone carried by the steel product to fall into the transition zone 40, effectively avoiding the problem of solution from the last functional zone entering the next functional zone and causing cross-tank.

[0034] In the embodiment, the defatting zone 10 and the water washing zone 20 are distributed in front and back, and a transition zone 40 is arranged between them. The transition zone 40 is connected with a water storage device 50, and the water storage device 50 is also connected with the defatting zone 10.

[0035] This design enables the transition zone 40 to collect the solution falling from the steel product when the steel product moves from the defatting zone 10 to the water washing zone 20 of the subsequent process and passes through the transition zone 40 therebetween. The collected solution flows into the water storage device 50 connected therewith. The solution in the water storage device 50 can be returned to the defatting zone 10, thereby realizing the recycling of the solution.

[0036] In one embodiment, the defatting zone 10 includes a pre-defatting tank 11 and a main defatting tank 12 arranged in sequence. According to the process requirements, the steel product is first pre-defatted and then main-defatted.

[0037] In the embodiment, the water washing zone 20 includes a first water washing zone 21 arranged at the front end of the defatting zone 10 and a second water washing zone 22 arranged between the defatting zone 10 and the ceramization zone 30.

[0038] Specifically, the first water washing zone 21 is a hot water tank, which is used to preliminarily wash the steel product entering the defatting zone 10 and prepare for the defatting process. The second water washing zone 22 is two ordinary water washing tanks, which are used to wash the steel product after defatting and prepare for the ceramization process.

[0039] In the embodiment, transition zones 40 and water storage devices 50 are arranged between the first water washing zone 21 and the pre-defatting tank 11, and between the main defatting tank 12 and the second water washing zone 22, so as to prevent cross-tank between different functional zones. This design can effectively isolate solutions with different pH values and ensure the processing effect of each process.

[0040] In one embodiment, the water storage device 50 adopts a tank structure. This structure not only can effectively store the solution collected from the transition zone 40, but also can provide a sedimentation space for the solution, which is conducive to improving the quality of the returned solution.

[0041] The tank is connected with the transition zone 40 through a recovery pipeline 51. The function of the recovery pipeline 51 is to transport the solution collected in the transition zone 40 to the tank. Meanwhile, the tank is also connected with its corresponding functional zone through a backflow pipeline 52. The function of the backflow pipeline 52 is to transport the solution after precipitation in the tank back to the functional zone for continuous use.

[0042] This design allows the solution to naturally precipitate in the tank, and the precipitated solution can return to the corresponding functional zone through the backflow pipeline 52 for continuous use, while the precipitate remains at the bottom of the tank and can be cleaned regularly. This not only improves the recycling rate of the solution, but also ensures the quality of the backflow solution.

[0043] In this embodiment, in order to further improve the effect of solution recycling, the outlet end 511 of the recovery pipeline 51 and the inlet end 521 of the backflow pipeline 52 are both arranged in the tank. The outlet end of the recovery pipeline 51 is lower than the inlet end of the backflow pipeline 52. This design has the following advantages:

[0044] 1. The lower position of the outlet end 511 of the recovery pipeline 51 can ensure that the solution collected from the transition zone 40 can smoothly enter the tank, and will not cause backflow of the solution due to the high position of the pipeline.

[0045] 2. The higher position of the inlet end 521 of the backflow pipeline 52 can absorb the supernatant after precipitation in the upper part of the tank. This can avoid bringing the precipitate back to the functional zone, and ensure the quality of the backflow solution.

[0046] Through this design, the system can better utilize the effect of gravity, and improve the efficiency and quality of solution recycling.

[0047] In this embodiment, in order to facilitate the discharge of unqualified solution, a waste water discharge pipeline 53 is connected to the bottom of the tank.

[0048] Specifically, when it is detected that the solution in the tank does not meet the backflow conditions (for example, the pH value or the conductivity exceeds the allowed range), the unqualified solution can be discharged through the waste water discharge pipeline 53 and sent to a sewage treatment station 54 (not shown in the figure) for treatment.

[0049] In this embodiment, the waste water discharge pipeline 53 includes a collection section 531 arranged in the tank and a conveying section 532 arranged outside the tank.

[0050] The collection section 531 is provided with a plurality of liquid inlets 533 along its length direction, and the distribution direction of the liquid inlets 533 is the same as the length direction of the tank. The arrangement of the plurality of liquid inlets 533 allows the waste water discharge pipeline 53 to absorb solution from multiple positions inside the tank, improving the efficiency of liquid discharge. At the same time, the liquid inlets 533 are distributed along the length direction of the tank, which can more comprehensively collect the solution at various positions of the tank and avoid dead angles.

[0051] The conveying section 532 is located outside the tank and is responsible for conveying the solution collected by the collecting section 531 to a designated location (such as a sewage treatment station 54).

[0052] In one embodiment, in order to ensure smooth flow of the solution in each pipeline, a booster pump is provided on the recovery pipeline 51 , the reflux pipeline 52 and the wastewater discharge pipeline 53 .

[0053] Specifically:

[0054] The booster pump on the recovery line 51 is used to ensure the solution is transported from the transition area 40 to the tank. The booster pump on the return line 52 is used to transport the solution in the tank back to the functional area. It can provide sufficient pressure to enable the solution to return to the higher functional area.

[0055] The booster pump on the wastewater discharge pipe 53 is used to transport the waste liquid in the tank to the sewage treatment station 54 or other designated locations. It can overcome the pressure loss of long-distance transportation and ensure the smooth discharge of waste liquid.

[0056] The provision of these booster pumps greatly improves the reliability and efficiency of the system, making the solution collection, reflux and discharge processes more controllable.

[0057] In one embodiment, a conductivity detection device 60 is provided in the water storage device 50 connected to the water washing area 20. The conductivity detection device 60 can monitor the conductivity of the solution recovered in the water washing area 20 to ensure that the quality of the recycled water meets the requirements.

[0058] Specifically, when the conductivity of the solution in the water storage device 50 is lower than 1000 μS / cm, it indicates that the solution can be directly reused, which not only saves water resources but also reduces the amount of wastewater that needs to be treated.

[0059] When the conductivity is higher than 1000 μS / cm, the solution needs to be discharged to the sewage treatment station 54 instead of being returned to the water washing area 20. This ensures that the water quality in the water washing area 20 is always maintained, which is conducive to maintaining the cleaning quality of steel products.

[0060] In this embodiment, the detection probe of the conductivity detection device 60 may be a two-electrode conductivity sensor of the InPro7001 / 120-VP model.

[0061] In one embodiment, a pH detection device 70 is provided within each of the water storage devices 50 connected to the degreasing zone 10 and the ceramic zone 30. The pH detection device 70 monitors the pH of the recovered solution to ensure that the refluxed solution does not affect the solution concentration in the corresponding functional zone. The pH requirements for these two functional zones are different, and therefore require separate monitoring.

[0062] Specifically, for the water storage device 50 connected to the degreasing area 10:

[0063] When the pH value of the solution in the water storage device 50 is monitored to be between 9.5 and 11, it indicates that the recovered degreasing solution still maintains appropriate alkalinity and can be directly returned to the degreasing area 10. This not only saves chemical resources, but also reduces the amount of wastewater that needs to be treated.

[0064] When the pH value is monitored to be lower than 9.5, it indicates that the alkaline substance content in the recovered solution is insufficient and is not suitable for direct return to the degreasing area 10. In this case, the batch of solution can be discharged to the sewage treatment station 54.

[0065] For the water storage device 50 in communication with the ceramic zone 30:

[0066] When the pH value of the solution in the water storage device 50 is monitored to be between 4.5 and 5.5, it indicates that the recovered ceramic solution maintains the correct acidity and can be directly returned to the ceramic zone 30 .

[0067] When the pH value is monitored to be higher than 5.5, it indicates that the acid content in the recovered solution is insufficient and is not suitable for direct return to the ceramic zone 30. In this case, the batch of solution can be discharged to the sewage treatment station 54.

[0068] This design can ensure that the pH value of the solution flowing back to the degreasing zone 10 or the ceramic zone 30 is always within the process requirements, avoiding the impact of pH value mutations on product quality, while maximizing the recycling rate of the solution, thereby improving production efficiency and reducing environmental impact.

[0069] In one embodiment, the pH detection device 70 is an industrial pH meter comprising a detection probe and a digital display converter (not shown in the accompanying drawings) that cooperate with each other. The detection probe is a pH electrode that generates a weak voltage signal corresponding to the pH value of the solution. The digital display converter receives the weak voltage signal from the pH electrode and converts it into a pH value for display.

[0070] In one embodiment, the system further comprises a conveying device 80. The conveying device 80 is used to allow the steel product to pass through various functional zones and the transition zone 40 between adjacent functional zones.

[0071] Specifically, the conveying device 80 can be a suspended conveyor chain (not shown in the drawings), and the steel products are suspended on the chain through hangers and move along the chain through various processing areas.

[0072] The steel products are sequentially passed through the hot water tank, pre-degreasing tank 11, main degreasing tank 12, water washing tank and ceramic zone (tank) 30 by the conveyor 80. Between each functional zone, the steel products will pass through the corresponding transition zone 40, which can effectively reduce the occurrence of the cross-tank phenomenon.

[0073] In one embodiment, the transition zone 40 adopts a funnel structure, the upper opening width is equivalent to the width of the tank body of the functional zone, and the lower part is narrowed and connected with the recovery pipeline 51.

[0074] Based on the above embodiment, the working process of the system is as follows:

[0075] 1. The steel products enter each functional zone in sequence for processing through the conveying device 80. The specific sequence is: hot water tank (first water washing zone 21), pre-degreasing tank 11, main degreasing tank 12, water washing tank (second water washing zone 22) and ceramization zone 30.

[0076] 2. When the steel products leave one functional zone and enter the next functional zone, they will pass through the transition zone 40 arranged between the two functional zones.

[0077] 3. The transition zone 40 collects the solutions falling from the steel products. These solutions are transported to the corresponding water storage device 50 through the recovery pipeline 51.

[0078] 4. The solutions in the water storage device 50 can be naturally precipitated and then returned to the corresponding functional zone through the return pipeline 52, realizing the recycling of the solutions.

[0079] 5. During the whole process, the conveying device 80 continuously operates to ensure that the steel products pass through each processing area in sequence according to the predetermined path and time.

[0080] The system effectively reduces the cross-tank phenomenon through the transition zone and its corresponding water storage device, improves the coating quality of the steel products, realizes the efficient use of the solutions through solution recycling, and reduces the production cost and environmental pollution.

[0081] The above is only a further embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art, according to the technical scheme and concept of the present application, makes equivalent replacement or change within the scope disclosed by the present application, which belongs to the protection scope of the present application.

Claims

1. A channel cross-contamination prevention and control system for the pre-treatment process of a steel product coating production line, characterized in that: include: A plurality of functional zones, wherein the functional zones include a degreasing zone (10), a water washing zone (20) and a ceramic zone (30); A transition zone (40) and a water storage device (50) are provided corresponding to each functional zone, wherein the transition zone (40) is located between adjacent functional zones, and the water storage device (50) is communicated with the corresponding transition zone (40) and functional zone, respectively.

2. The system according to claim 1, wherein: The water storage device (50) is a tank structure, and the tank is connected to the transition area (40) through a recovery pipe (51) and is connected to the functional area through a return pipe (52).

3. The system according to claim 2, characterized in that The liquid outlet end (511) of the recovery pipe (51) and the liquid inlet end (521) of the return pipe (52) are both arranged in the tank body, and the position of the liquid outlet end (511) of the recovery pipe (51) is lower than the position of the liquid inlet end (521) of the return pipe (52).

4. The cross-tank prevention and control system for the pre-treatment process of the steel product coating production line according to claim 3 is characterized in that: The bottom of the tank is connected to a wastewater discharge pipe (53).

5. The cross-tank prevention and control system for the pre-treatment process of the steel product coating production line according to claim 4 is characterized in that: The wastewater discharge pipe (53) comprises a collecting section (531) arranged inside the tank body and a conveying section (532) arranged outside the tank body. The collecting section (531) is provided with a plurality of liquid inlets (533) along its length direction. The distribution direction of the liquid inlets (533) is the same as the length direction of the tank body.

6. The cross-tank prevention and control system for the pre-treatment process of the steel product coating production line according to claim 5 is characterized in that: The recovery pipe (51), the reflux pipe (52) and the wastewater discharge pipe (53) are respectively provided with a booster pump.

7. The cross-tank prevention and control system for the pre-treatment process of the steel product coating production line according to claim 1 is characterized in that: A conductivity detection device (60) is provided in the water storage device (50) communicated with the water washing area (20).

8. The cross-tank prevention and control system for the pre-treatment process of the steel product coating production line according to claim 1 is characterized in that: A pH detection device (70) is provided in each of the water storage devices (50) communicating with the degreasing area (10) and the ceramic area (30).

9. The cross-tank prevention and control system for the pre-treatment process of a steel product coating production line according to any one of claims 1 to 8, characterized in that: The system further comprises a conveying device (80) for passing the steel product through each of the functional zones and a transition zone (40) between adjacent functional zones.

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