A wastewater recycling device for the cleaning section of a cold rolling line

Abstract

The present invention belongs to the technical field of cold rolling, and specifically is a wastewater recycling device for a cold rolling line cleaning section, comprising a machine body; a cold-rolled piece is arranged inside the machine body; a No. 1 alkali cleaning machine is fixedly connected to an inner side wall of the machine body; a No. 2 alkali cleaning machine is fixedly connected to one side of the No. 1 alkali cleaning machine inside the machine body; an electrolyzer is fixedly connected to one side of the No. 2 alkali cleaning machine inside the machine body; the cold-rolled piece is transported inside the machine body, and the surface of the cold-rolled piece is cleaned by the rinsing machine, the electrolyzer, the No. 2 alkali cleaning machine and the No. 1 alkali cleaning machine; a No. 1 wastewater tank, a No. 2 wastewater tank, a No. 3 wastewater tank and a No. 4 wastewater tank are respectively arranged below the rinsing machine, the electrolyzer, the No. 2 alkali cleaning machine and the No. 1 alkali cleaning machine, and can collect wastewater; and the wastewater collected in the No. 1 wastewater tank, the No. 2 wastewater tank and the No. 3 wastewater tank can be transported through the cooperation of the No. 1 circulation pipe, the No. 2 circulation pipe and the No. 3 circulation pipe, thereby recycling the wastewater, reducing resource waste and saving costs.

Description

Technical Field

[0001] The invention belongs to the technical field of cold rolling, in particular to a device for recycling waste water from a cleaning section of a cold rolling line. Background Art

[0002] Cold rolling uses hot-rolled steel coils as raw materials, and then undergoes cold continuous rolling after pickling to remove the oxide scale. The finished product is hard rolled coils, which can be used as raw materials for hot-dip galvanizing plants because hot-dip galvanizing units are all equipped with annealing lines.

[0003] The cleaning section is a crucial production area in cold-rolled galvanizing lines. The steel strip undergoes alkaline cleaning, brushing, electrolytic cleaning, and spray rinsing, removing rolling oil, iron powder, and impurity particles from the strip surface. The cleaning section consists of an electrolytic tank, an alkaline cleaning section, and a rinsing tank, each of which generates wastewater.

[0004] In the current existing technology, the electrolytic cell, alkali washing section and rinsing tank in the cleaning section each produce a large amount of wastewater. The wastewater from the rinsing section is now recycled to the electrolytic section for use, and the wastewater from the electrolytic section is recycled to the alkali washing section for use. By adding a circulation pipeline for recycling, this operation greatly reduces consumption and reduces costs. Here we provide a cold rolling line cleaning section wastewater recycling device. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the existing technology.

[0006] In order to solve the above technical problems, the present invention provides a wastewater recycling device for the cleaning section of a cold rolling line, comprising a machine body; a cold-rolled workpiece is arranged inside the machine body; a No. 1 alkali cleaning machine is fixedly connected to the inner side wall of the machine body; a No. 2 alkali cleaning machine is fixedly connected to one side of the No. 1 alkali cleaning machine; an electrolyzer is fixedly connected to one side of the No. 2 alkali cleaning machine; a rinsing machine is fixedly connected to one side of the electrolyzer; a No. 1 wastewater tank is fixedly connected to one side of the inner side wall of the machine body below the rinsing machine; a No. 2 wastewater tank is fixedly connected to one side of the No. 1 wastewater tank; a No. 3 wastewater tank is fixedly connected to one side of the No. 2 wastewater tank; a No. 4 wastewater tank is fixedly connected to one side of the No. 3 wastewater tank; a No. 1 circulation pipe is connected between the No. 1 wastewater tank and the electrolyzer; a No. 2 circulation pipe is connected between the No. 2 wastewater tank and the No. 2 alkali cleaning machine; and a No. 3 circulation pipe is connected between the No. 3 wastewater tank and the No. 1 alkali cleaning machine.

[0007] In one embodiment of the present invention, the side end of the body is fixedly connected to water pipe No. 1, which is connected to waste water tank No. 4; the side end of water pipe No. 1 away from the body is fixedly connected to a filter box; the end of the filter box away from water pipe No. 1 is fixedly connected to water pipe No. 2; a filter block is installed inside the filter box; the top end of the filter block is fixedly connected to a top cover; filter plate No. 1 is fixedly connected inside the top cover; a through groove No. 1 is provided inside the filter plate No. 1; a filter plate No. 2 is fixedly connected to one side of the filter plate No. 1 inside the top cover; and a plurality of groups of through grooves No. 2 are provided inside the filter plate No. 2.

[0008] In one embodiment of the present invention, a liquid receiving plate is fixedly connected between the No. 1 wastewater tank and the No. 2 wastewater tank; and a diversion block is fixedly connected to the top of the liquid receiving plate.

[0009] In one embodiment of the present invention, a filter strip is fixedly connected to one side of the No. 1 filter plate; the No. 1 through groove corresponds to the filter strip; and a plurality of through holes are provided inside the filter strip.

[0010] In one embodiment of the present invention, multiple groups of activated carbon are provided inside the No. 1 filter plate; and activated carbon is installed inside the No. 1 through groove.

[0011] In one embodiment of the present invention, the top end of the filter box is rotatably connected to a rotating rod; a positioning plate is fixedly connected to the middle of the rotating rod, and a top cover is installed at the bottom end of the positioning plate.

[0012] In one embodiment of the present invention, a No. 1 sealing ring is fixedly connected to the bottom end of the top cover; a No. 2 sealing ring is fixedly connected to the interior of the filter box, and the No. 2 sealing ring corresponds to the No. 1 sealing ring.

[0013] In one embodiment of the present invention, a positioning magnet plate is fixedly connected to the bottom end of the filter block, and a positioning magnet plate is inserted into the interior of the filter box.

[0014] In one embodiment of the present invention, the side end of the filter strip is fixedly connected to a limiting cotton; a through groove No. 1 is provided on one side of the limiting cotton.

[0015] In one embodiment of the present invention, a liquid baffle is fixedly connected to the interior of the machine body; a liquid baffle is fixedly connected to the top of the No. 1 wastewater tank, and liquid baffles are provided at both ends of the cold-rolled piece.

[0016] The above technical solution of the present invention has the following advantages over the prior art:

[0017] The present invention provides a wastewater recycling device for a cold rolling line cleaning section. The device transports cold rolled pieces inside a machine body, and a rinsing machine, an electrolysis machine, a No. 2 alkali washer, and a No. 1 alkali washer clean the surface of the cold rolled pieces. A No. 1 wastewater tank, a No. 2 wastewater tank, a No. 3 wastewater tank, and a No. 4 wastewater tank are respectively arranged below the rinsing machine, the electrolysis machine, the No. 2 alkali washer, and the No. 1 alkali washer, and the wastewater can be collected. The wastewater collected in the No. 1 wastewater tank, the No. 2 wastewater tank, and the No. 3 wastewater tank can be transported through the cooperation of a No. 1 circulation pipe, a No. 2 circulation pipe, and a No. 3 circulation pipe, so that the wastewater is recycled, resource waste is reduced, and cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1 A perspective view of the present invention;

[0020] Figure 2 This is a structural perspective diagram of the No. 1 alkali cleaning machine of the present invention;

[0021] Figure 3 This is a perspective view of the structure of the No. 1 circulation pipe of the present invention;

[0022] Figure 4 A three-dimensional diagram of the positioning plate structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the filter block structure of the present invention;

[0024] Legend:

[0025] 1. Machine body; 12. Cold-rolled parts; 13. Alkali cleaning machine No. 1; 14. Alkali cleaning machine No. 2; 15. Electrolysis machine; 16. Rinsing machine; 17. Wastewater tank No. 1; 18. Wastewater tank No. 2; 19. Wastewater tank No. 3; 20. Wastewater tank No. 4; 21. Circulation pipe No. 1; 22. Circulation pipe No. 2; 23. Circulation pipe No. 3; 24. Liquid baffle; 25. Liquid receiving plate; 26. Diverter block; 27. Water pipe No. 1; 28. Filter box; 29. Water pipe No. 2; 30. Top cover; 31. Rotating rod; 32. Positioning plate; 33. Filter block; 34. Filter plate No. 1; 35. Filter plate No. 2; 36. Filter strip; 37. Through hole; 38. Activated carbon; 39. Limiting cotton; 40. Positioning magnet plate; 41. Sealing ring No. 1; 42. Sealing ring No. 2. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] See also Figure 1-Figure 5 The present invention provides a cold rolling line cleaning section wastewater recycling device, comprising a machine body 1; a cold-rolled workpiece 12 is provided inside the machine body 1; a No. 1 alkali washer 13 is fixedly connected to the inner side wall of the machine body 1; a No. 2 alkali washer 14 is fixedly connected to one side of the No. 1 alkali washer 13; an electrolyzer 15 is fixedly connected to one side of the No. 2 alkali washer 14; a rinsing machine 16 is fixedly connected to one side of the electrolyzer 15; a No. 1 wastewater tank 17 is fixedly connected to the inner side wall of the machine body 1 below the rinsing machine 16; One side of the No. 1 wastewater tank 17 is fixedly connected to the No. 2 wastewater tank 18; one side of the No. 2 wastewater tank 18 is fixedly connected to the No. 3 wastewater tank 19; one side of the No. 3 wastewater tank 19 is fixedly connected to the No. 4 wastewater tank 20; a No. 1 circulation pipe 21 is connected between the No. 1 wastewater tank 17 and the electrolyzer 15; a No. 2 circulation pipe 22 is connected between the No. 2 wastewater tank 18 and the No. 2 alkali cleaning machine 14; and a No. 3 circulation pipe 23 is connected between the No. 3 wastewater tank 19 and the No. 1 alkali cleaning machine 13.

[0028] During operation, the electrolytic cell, alkali washing section and rinsing tank in the cleaning section will each produce a large amount of waste water. The waste water from the rinsing section is now recycled to the electrolytic section for use, and the waste water from the electrolytic section is recycled to alkali washing. By increasing the circulation pipeline for recycling, this operation greatly reduces consumption and reduces costs. During operation, the cold-rolled piece 12 is transported inside the machine body 1, and the rinsing machine 16, electrolytic machine 15, No. 2 alkali washing machine 14 and No. 1 alkali washing machine 13 clean the surface of the cold-rolled piece 12. The waste water generated by the rinsing machine 16 for cleaning the cold-rolled piece 12 will fall into the No. 1 wastewater tank 17, and the No. The wastewater tank 17 is located at the bottom of the rinsing machine 16. The No. 1 wastewater tank 17 can collect the wastewater generated by the rinsing machine 16. A liquid pump is installed inside the No. 1 wastewater tank 17. The No. 1 wastewater tank 17 pumps the internal wastewater into the No. 1 circulation pipe 21 through the liquid pump. The wastewater enters the interior of the electrolyzer 15 through the No. 1 circulation pipe 21. The electrolyzer 15 can clean the surface of the cold-rolled piece 12. The No. 1 circulation pipe 21 transports the wastewater inside the No. 1 wastewater tank 17 to the electrolyzer 15. The electrolyzer 15 can recycle the wastewater, thereby reducing resource waste. The No. 2 wastewater tank 18 is located at the bottom of the electrolyzer Below the machine 15, the No. 2 wastewater tank 18 can collect the wastewater generated by the electrolysis machine 15, and the No. 2 circulation pipe 22 can transport the wastewater collected by the No. 2 wastewater tank 18 to the No. 2 alkali cleaning machine 14. The No. 2 alkali cleaning machine 14 can clean the surface of the cold-rolled piece 12. The No. 2 alkali cleaning machine 14 can use the wastewater transported by the No. 2 circulation pipe 22. The No. 3 wastewater tank 19 is set below the No. 2 alkali cleaning machine 14. The wastewater generated by the No. 2 alkali cleaning machine 14 for cleaning the cold-rolled piece 12 can fall into the No. 3 wastewater tank 19. The wastewater generated by the No. 2 alkali cleaning machine 14 is collected by the No. 3 wastewater tank 19. The wastewater in the No. 3 wastewater tank 19 is transported to the No. 1 alkali cleaning machine 13 through the No. 3 circulation pipe 23. The No. 1 alkali cleaning machine 13 can clean the surface of the cold-rolled piece 12. The No. 4 wastewater tank 20 is arranged below the No. 1 alkali cleaning machine 13. The wastewater generated by the No. 1 alkali cleaning machine 13 will be collected in the No. 4 wastewater tank 20. The wastewater collected in the No. 1 wastewater tank 17, the No. 2 wastewater tank 18 and the No. 3 wastewater tank 19 can be transported through the cooperation of the No. 1 circulation pipe 21, the No. 2 circulation pipe 22 and the No. 3 circulation pipe 23, thereby recycling the wastewater, reducing resource waste and saving costs.

[0029] Further, such as Figure 5The side end of the body 1 is fixedly connected to a No. 1 water pipe 27, which is connected to the No. 4 wastewater tank 20; the side end of the No. 1 water pipe 27 away from the body 1 is fixedly connected to a filter box 28; the end of the filter box 28 away from the No. 1 water pipe 27 is fixedly connected to a No. 2 water pipe 29; a filter block 33 is installed inside the filter box 28; the top end of the filter block 33 is fixedly connected to a top cover 30; a No. 1 filter plate 34 is fixedly connected to the inside of the top cover 30; a No. 1 through groove is defined inside the No. 1 filter plate 34; a No. 2 filter plate 35 is fixedly connected to one side of the No. 1 filter plate 34 inside the top cover 30; and a plurality of groups of No. 2 through grooves are defined inside the No. 2 filter plate 35.

[0030] During operation, the No. 4 wastewater tank 20 is connected to the No. 1 water pipe 27. The wastewater collected in the No. 4 wastewater tank 20 will be discharged through the No. 1 water pipe 27. The wastewater will be discharged from the No. 2 water pipe 29 through the No. 1 water pipe 27 and the filter box 28. When the wastewater passes through the filter block 33 inside the filter box 28, the No. 1 filter plate 34 and the No. 2 filter plate 35 filter the cotton material. When the wastewater passes through the No. 1 filter plate 34 and the No. 2 filter plate 35, it will be filtered and processed to reduce the pollution hazards of the wastewater to the environment. The wastewater can flow from the No. 1 through groove inside the No. 1 filter plate 34 and the No. 2 through groove inside the No. 2 filter plate 35. The No. 1 through groove and the No. 2 through groove inside the No. 2 filter plate 35 are not on the same horizontal line, so when the wastewater passes through the No. 1 through groove, it will directly hit the No. 2 filter plate 35, thereby increasing the probability of the wastewater being filtered by the No. 2 filter plate 35 and improving the wastewater filtration effect.

[0031] Further, such as Figure 3 As shown, a liquid receiving plate 25 is fixedly connected between the No. 1 wastewater tank 17 and the No. 2 wastewater tank 18 ; a diversion block 26 is fixedly connected to the top of the liquid receiving plate 25 .

[0032] During operation, there is a gap between the No. 1 wastewater tank 17 and the No. 2 wastewater tank 18. The liquid receiving plate 25 is located in the gap between the No. 1 wastewater tank 17 and the No. 2 wastewater tank 18. The wastewater generated by the rinsing machine 16 and the electrolyzer 15 will flow into the No. 1 wastewater tank 17 and the No. 2 wastewater tank 18. The No. 2 wastewater tank 18 and the No. 1 wastewater tank 17 are located below the electrolyzer 15 and the rinsing machine 16. Most of the wastewater generated by the rinsing machine 16 and the electrolyzer 15 will fall into the No. 2 wastewater tank 18 and the No. 1 wastewater tank 17. During the flow process, part of the wastewater will flow into the gap between the No. 1 wastewater tank 17 and the No. 2 wastewater tank 18. The gap can be connected by the liquid receiving plate 25. When the wastewater flows onto the liquid receiving plate 25, the liquid receiving plate 25 can guide the wastewater to the No. 2 wastewater tank 18 and the No. 1 wastewater tank 17. The diverter block 26 is arranged in the middle position of the liquid receiving plate 25, which can guide the wastewater so that the wastewater generated by the wastewater rinser 16 is directed to the No. 1 wastewater tank 17 as much as possible, and the wastewater generated by the electrolyzer 15 is directed to the No. 2 wastewater tank 18.

[0033] Further, such as Figure 5 As shown, a filter strip 36 is fixedly connected to one side of the No. 1 filter plate 34 ; the No. 1 through groove corresponds to the filter strip 36 ; and a plurality of through holes 37 are provided inside the filter strip 36 .

[0034] When working, the No. 1 filter plate 34 can filter and purify the wastewater. The No. 1 groove inside the No. 1 filter plate 34 corresponds to the filter strip 36. When the wastewater flows through the No. 1 groove, it enters the filter strip 36. The filter strip 36 is made of filter cotton material. When the wastewater enters the filter strip 36 for filtration, the wastewater can be discharged through the through hole 37 inside the filter strip 36, thereby increasing the contact probability between the wastewater and the filter strip 36. The cooperation between the filter strip 36 and the No. 1 filter plate 34 improves the wastewater filtration effect.

[0035] Further, such as Figure 5 As shown, multiple groups of activated carbon 38 are provided inside the No. 1 filter plate 34; and activated carbon 38 is installed inside the No. 1 through groove.

[0036] During operation, wastewater enters the filter box 28 and then enters the filter block 33. The No. 1 filter plate 34 can filter the wastewater. When the wastewater passes through the No. 1 groove inside the No. 1 filter plate 34, the wastewater comes into contact with the activated carbon 38. The activated carbon 38 can adsorb impurities in the wastewater. Multiple holes are opened inside the activated carbon 38 to increase the flow rate of the wastewater, thereby ensuring the filtration effect and filtration speed of the wastewater.

[0037] Further, such as Figure 4 As shown, the top end of the filter box 28 is rotatably connected to a rotating rod 31; the middle of the rotating rod 31 is fixedly connected to a positioning plate 32, and the bottom end of the positioning plate 32 is installed with a top cover 30.

[0038] During operation, the top cover 30 needs to be installed to the inside of the filter box 28 so that the filter block 33 is inserted into the inside of the filter box 28. The rotating rod 31 is rotated to rotate the positioning plate 32. The positioning plate 32 is rotated to the top of the top cover 30. The top of the filter box 28 is provided with multiple groups of positioning plates 32. The positions of the top cover 30 and the filter block 33 are clamped and limited by the multiple groups of positioning plates 32. The filter block 33 needs to be maintained and replaced regularly. The filter block 33 can be easily installed and removed by rotating the positioning plate 32.

[0039] Further, such as Figure 5 As shown, a No. 1 sealing ring 41 is fixedly connected to the bottom end of the top cover 30 ; a No. 2 sealing ring 42 is fixedly connected to the interior of the filter box 28 , and the No. 2 sealing ring 42 corresponds to the No. 1 sealing ring 41 .

[0040] During operation, wastewater needs to flow through the No. 1 water pipe 27 and the filter box 28. There is a gap between the filter block 33, the top cover 30 and the filter box 28. When the filter block 33 is installed into the interior of the filter box 28, the No. 1 sealing ring 41 will be installed and stuck to the inside of the No. 2 sealing ring 42. The No. 1 sealing ring 41 and the No. 2 sealing ring 42 are made of rubber material and have good sealing performance. The cooperation between the No. 1 sealing ring 41 and the No. 2 sealing ring 42 can improve the sealing performance between the filter box 28 and the filter block 33, thereby avoiding leakage of wastewater during the flow process.

[0041] Further, such as Figure 5 As shown, a positioning magnet plate 40 is fixed to the bottom end of the filter block 33 , and a positioning magnet plate 40 is inserted into the interior of the filter box 28 .

[0042] During operation, the filter block 33 needs to be installed inside the filter box 28 before work. The wastewater can be filtered through the filter block 33. The installation of the filter block 33 inside the filter box 28 will make the bottom end of the positioning magnet plate 40 contact the inner side wall of the bottom end of the filter box 28. The filter box 28 is adsorbed by the magnetic attraction of the positioning magnet plate 40. The positioning magnet plate 40 can assist the installation of the filter box 28, and the adsorption force of the positioning magnet plate 40 can also improve the fixation of the position of the filter block 33.

[0043] Further, such as Figure 5 As shown, the side end of the filter strip 36 is fixedly connected to a limiting cotton 39; a through groove No. 1 is provided on one side of the limiting cotton 39.

[0044] During operation, after the wastewater passes through the No. 1 groove inside the No. 1 filter plate 34, the wastewater will flow directly to the filter strip 36. There is a gap between the filter strip 36 and the No. 1 filter plate 34. The limiting cotton 39 can block the gap between the No. 1 filter plate 34 and the filter strip 36, so that most of the wastewater enters the interior of the filter strip 36 and is filtered. A small amount of wastewater will pass through the limiting cotton 39. The limiting cotton 39 is made of filter cloth and can filter impurities in the wastewater.

[0045] Further, such as Figure 2 As shown, a liquid baffle 24 is fixedly connected to the interior of the machine body 1 ; a liquid baffle 24 is fixedly connected to the top of the No. 1 waste water tank 17 , and liquid baffles 24 are provided at both ends of the cold-rolled piece 12 .

[0046] During operation, the liquid baffle 24 is positioned at both ends of the cold-rolled workpiece 12. The rinsing machine 16, the electrolysis machine 15, the No. 2 alkali cleaning machine 14 and the No. 1 alkali cleaning machine 13 can clean the surface of the cold-rolled workpiece 12. Wastewater is generated during the cleaning process, and the wastewater needs to be collected into the interior of the No. 1 wastewater tank 17, the No. 2 wastewater tank 18, the No. 3 wastewater tank 19 and the No. 4 wastewater tank 20 to facilitate the recycling of the wastewater. The liquid baffle 24 can limit the flow of wastewater, and the wastewater can flow normally to the interior of the No. 1 wastewater tank 17, the No. 2 wastewater tank 18, the No. 3 wastewater tank 19 and the No. 4 wastewater tank 20 through the liquid baffle 24.

[0047] Working principle: The electrolytic cell, alkali washing section and rinsing tank in the cleaning section will each produce a large amount of waste water, which will be directly discharged, thereby increasing water waste. The waste water of the rinsing section is now recycled to the electrolytic section for use, and the waste water of the electrolytic section is recycled to the alkali washing section. By increasing the circulation pipeline for recycling, such operation greatly reduces consumption and reduces costs. During operation, the cold-rolled piece 12 is transported inside the machine body 1, and the rinsing machine 16, the electrolytic machine 15, the second alkali washing machine 14 and the first alkali washing machine 13 clean the surface of the cold-rolled piece 12. The rinsing machine 16 cleans the waste water generated by cleaning the cold-rolled piece 12. The water will fall into the No. 1 wastewater tank 17, which is located at the bottom of the rinsing machine 16. The No. 1 wastewater tank 17 can collect the wastewater generated by the rinsing machine 16. A liquid pump is installed inside the No. 1 wastewater tank 17. The No. 1 wastewater tank 17 pumps the internal wastewater into the No. 1 circulation pipe 21 through the liquid pump. The wastewater enters the interior of the electrolysis machine 15 through the No. 1 circulation pipe 21. The electrolysis machine 15 can clean the surface of the cold-rolled piece 12. The No. 1 circulation pipe 21 transports the wastewater inside the No. 1 wastewater tank 17 to the electrolysis machine 15. The electrolysis machine 15 can recycle the wastewater, thereby reducing resource waste. The No. 1 wastewater tank 18 is arranged below the electrolysis machine 15. The No. 2 wastewater tank 18 can collect the wastewater generated by the electrolysis machine 15. The No. 2 circulation pipe 22 can transport the wastewater collected by the No. 2 wastewater tank 18 to the No. 2 alkali cleaning machine 14. The No. 2 alkali cleaning machine 14 can clean the surface of the cold-rolled piece 12. The No. 2 alkali cleaning machine 14 can use the wastewater transported by the No. 2 circulation pipe 22. The No. 3 wastewater tank 19 is arranged below the No. 2 alkali cleaning machine 14. The wastewater generated by the No. 2 alkali cleaning machine 14 for cleaning the cold-rolled piece 12 can fall into the No. 3 wastewater tank 19. The wastewater generated by the No. 2 alkali cleaning machine 14 is transported to the No. 3 wastewater tank After being collected by the No. 19, the wastewater in the No. 3 wastewater tank 19 is transported to the No. 1 alkali washer 13 through the No. 3 circulation pipe 23. The No. 1 alkali washer 13 can clean the surface of the cold-rolled sheet 12. The No. 4 wastewater tank 20 is arranged below the No. 1 alkali washer 13. The wastewater generated by the No. 1 alkali washer 13 will be collected in the No. 4 wastewater tank 20. The wastewater collected by the No. 1 wastewater tank 17, the No. 2 wastewater tank 18 and the No. 3 wastewater tank 19 can be transported through the No. 1 circulation pipe 21, the No. 2 circulation pipe 22 and the No. 3 circulation pipe 23, thereby recycling the wastewater, reducing resource waste and saving costs.The first water pipe 27 is connected to the fourth wastewater tank 20. The wastewater collected in the fourth wastewater tank 20 needs to be discharged. It passes through the first water pipe 27 and the filter box 28 and then out of the second water pipe 29. The wastewater contains a large amount of impurities and needs to be filtered and purified to reduce environmental damage. After entering the interior of the filter box 28, the wastewater passes through the first filter plate 34 and the second filter plate 35. The first and second filter plates 34, 35 are made of filter cotton. Impurities are filtered out of the wastewater through the first and second filter plates 34, 35. The wastewater can accelerate its flow through the first and second through grooves inside the first and second filter plates 34, 35. The first and second through grooves are not located at the same level, which makes it easier for the wastewater to contact the second filter plate 35 after passing through the first through groove. It needs to flow on the second filter plate 35 to the second through groove. Passing through the filter box 28 can improve the filtration of the wastewater and reduce environmental pollution.

[0048] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cold rolling line cleaning section wastewater recycling device, characterized by: The invention comprises a machine body (1); a cold-rolled piece (12) is provided inside the machine body (1); a No. 1 alkali cleaning machine (13) is fixedly connected to the inner side wall of the machine body (1); a No. 2 alkali cleaning machine (14) is fixedly connected to one side of the No. 1 alkali cleaning machine (13); an electrolytic machine (15) is fixedly connected to one side of the No. 2 alkali cleaning machine (14); a rinsing machine (16) is fixedly connected to one side of the electrolytic machine (15); a No. 1 waste water tank (17) is fixedly connected to the inner side wall of the machine body (1) below the rinsing machine (16); the No. 1 waste water tank (17) is fixedly connected to one side of the No. 2 alkali cleaning machine (14); a No. 2 alkali cleaning machine (14) is fixedly connected to one side of the No. 2 alkali cleaning machine (14); a No. 1 waste water tank (17 ... A second wastewater tank (18) is fixedly connected to one side of the second wastewater tank (18); a third wastewater tank (19) is fixedly connected to one side of the third wastewater tank (19); a fourth wastewater tank (20) is fixedly connected to one side of the third wastewater tank (19); a first circulation pipe (21) is connected between the first wastewater tank (17) and the electrolyzer (15); a second circulation pipe (22) is connected between the second wastewater tank (18) and the second alkali washer (14); a third circulation pipe (23) is connected between the third wastewater tank (19) and the first alkali washer (13); A No. 1 water pipe (27) is fixedly connected to the side end of the body (1), and the No. 1 water pipe (27) is connected to the No. 4 wastewater tank (20); a filter box (28) is fixedly connected to the side end of the No. 1 water pipe (27) away from the body (1); a No. 2 water pipe (29) is fixedly connected to one end of the filter box (28) away from the No. 1 water pipe (27); a filter block (33) is installed inside the filter box (28); a top cover (30) is fixedly connected to the top of the filter block (33); a No. 1 filter plate (34) is fixedly connected inside the top cover (30); a No. 1 through groove is provided inside the No. 1 filter plate (34); a No. 2 filter plate (35) is fixedly connected to one side of the No. 1 filter plate (34) inside the top cover (30); and a plurality of groups of No. 2 through grooves are provided inside the No. 2 filter plate (35).

2. The cold rolling line cleaning section wastewater recycling device according to claim 1, characterized in that: A liquid receiving plate (25) is fixedly connected between the No. 1 wastewater tank (17) and the No. 2 wastewater tank (18); a diversion block (26) is fixedly connected to the top of the liquid receiving plate (25).

3. The cold rolling line cleaning section wastewater recycling device according to claim 2, characterized in that: A filter strip (36) is fixedly connected to one side of the No. 1 filter plate (34); the No. 1 through groove corresponds to the filter strip (36); and a plurality of through holes (37) are provided inside the filter strip (36).

4. The cold rolling line cleaning section wastewater recycling device according to claim 3, characterized in that: Multiple groups of activated carbon (38) are provided inside the No. 1 filter plate (34); and activated carbon (38) is installed inside the No. 1 through groove.

5. The cold rolling line cleaning section wastewater recycling device according to claim 4, characterized in that: The top end of the filter box (28) is rotatably connected to a rotating rod (31); a positioning plate (32) is fixedly connected to the middle of the rotating rod (31); and a top cover (30) is installed at the bottom end of the positioning plate (32).

6. The cold rolling line cleaning section wastewater recycling device according to claim 5, characterized in that: A No. 1 sealing ring (41) is fixedly connected to the bottom end of the top cover (30); a No. 2 sealing ring (42) is fixedly connected to the interior of the filter box (28), and the No. 2 sealing ring (42) corresponds to the No. 1 sealing ring (41).

7. The cold rolling line cleaning section wastewater recycling device according to claim 6, characterized in that: A positioning magnet plate (40) is fixedly connected to the bottom end of the filter block (33), and a positioning magnet plate (40) is inserted into the interior of the filter box (28).

8. The cold rolling line cleaning section wastewater recycling device according to claim 7, characterized in that: The side end of the filter strip (36) is fixedly connected to a limiting cotton (39); a through slot No. 1 is provided on one side of the limiting cotton (39).

9. The cold rolling line cleaning section wastewater recycling device according to claim 8, characterized in that: A liquid baffle (24) is fixedly connected to the interior of the machine body (1); a liquid baffle (24) is fixedly connected to the top of the No. 1 wastewater tank (17); and liquid baffles (24) are provided at both ends of the cold-rolled piece (12).

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