Copper strip production wastewater treatment device

Abstract

The utility model provides a copper strip production wastewater treatment device. The copper strip production wastewater treatment device comprises a first water storage part with a first accommodating cavity; the air flotation device is provided with a second containing cavity, a first liquid inlet, a first liquid outlet and a second liquid outlet, the first liquid inlet, the first liquid outlet and the second liquid outlet all communicate with the second containing cavity, the first liquid outlet is located in the bottom of the air flotation device, the second liquid outlet is located in the top of the air flotation device, the first containing cavity communicates with the first liquid inlet, and the second containing cavity communicates with the second liquid outlet; the air flotation device can generate bubbles; the liquid inlet end of the waste discharge pipe is communicated with the second liquid outlet; the first filtering part is provided with a third containing cavity, the first liquid outlet is communicated with the third containing cavity, and a first filtering layer is arranged in the third containing cavity. According to the technical scheme, the problem that an existing copper strip cleaning wastewater treatment device cannot remove copper powder, rolling oil stains and emulsified oil in wastewater can be solved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a wastewater treatment device for copper strip production. Background Technology

[0002] In the copper strip production process, the cleaning process is a crucial step in ensuring product surface quality, requiring a large amount of clean water to remove oil, oxide scale, and impurities from the copper strip surface. Currently, the industry mainly uses two methods to treat copper strip cleaning wastewater: one is direct discharge after simple sedimentation, and the other is a crude treatment method of "sedimentation + filtration" followed by small-scale reuse. Both of these methods, relying solely on simple sedimentation and filtration, cannot effectively remove copper powder, rolling oil, and emulsified oil from the wastewater, resulting in poor reclaimed water quality. This can easily lead to incomplete cleaning of the copper strip surface, even causing secondary pollution and affecting product quality. Utility Model Content

[0003] The main purpose of this utility model is to provide a copper strip production wastewater treatment device that can solve the problem that existing copper strip cleaning wastewater treatment devices cannot remove copper powder, rolling oil stains and emulsified oil from the wastewater.

[0004] To achieve the above objectives, this utility model provides a copper strip production wastewater treatment device, comprising: a first water storage section having a first receiving cavity configured to receive wastewater to be treated; an air flotation device having a second receiving cavity, a first inlet, a first outlet, and a second outlet, all of which are connected to the second receiving cavity; the first outlet being located at the bottom of the air flotation device and the second outlet being located at the top of the air flotation device; the first receiving cavity being connected to the first inlet; the air flotation device being able to generate bubbles, which can adhere to copper powder, rolling oil, and emulsified oil in the wastewater to be treated and form scum; a waste discharge pipe having its inlet end connected to the second outlet; and a first filtration section having a third receiving cavity, with the first outlet connected to the third receiving cavity, and a first filter layer disposed within the third receiving cavity.

[0005] Furthermore, the first filter layer includes multiple first filter particles, and the particle size of each first filter particle ranges from 1 mm to 3 mm.

[0006] Furthermore, the third receiving cavity is also provided with a second filter layer and a third filter layer. The third filter layer, the second filter layer and the first filter layer are arranged in sequence from top to bottom. The second filter layer includes multiple second filter particles, and the particle size of each second filter particle ranges from 2mm to 3mm. The third filter layer includes multiple third filter particles, and the particle size of each third filter particle ranges from 3mm to 5mm.

[0007] Furthermore, the first filter particles are made of garnet, the second filter particles are made of quartz sand, and the third filter particles are made of anthracite.

[0008] Furthermore, the thickness of the first filter layer is L1, the thickness of the second filter layer is L2, and the thickness of the third filter layer is L3. The value range of the thickness L1 of the first filter layer is 0.5mm≤L1≤1.5mm, the value range of the thickness L2 of the second filter layer is 1.5mm≤L2≤2.0mm, and the value range of the thickness L3 of the third filter layer is 1.5mm≤L3≤2.0mm.

[0009] Furthermore, the copper strip production wastewater treatment device also includes an ultrafiltration membrane filtration device and a nanofiltration membrane filtration device. The ultrafiltration membrane filtration device and the nanofiltration membrane filtration device are arranged sequentially along the conveying direction of the wastewater to be treated. The first filtration section also has a third liquid outlet that communicates with the third receiving cavity. The liquid inlet of the ultrafiltration membrane filtration device is connected to the third liquid outlet, and the liquid outlet of the ultrafiltration membrane filtration device is connected to the liquid inlet of the nanofiltration membrane filtration device.

[0010] Furthermore, the ultrafiltration membrane filtration device includes a first tank connected to a third outlet and an ultrafiltration membrane disposed within the first tank, the pore size of which ranges from 20 μm to 50 μm; the nanofiltration membrane filtration device includes a second tank connected to the outlet of the first tank and a nanofiltration membrane disposed within the second tank, the pore size of which ranges from 0.2 μm to 1 μm; and / or, the copper strip production wastewater treatment device further includes a second water storage section, the inlet of which is connected to the outlet of the nanofiltration membrane filtration device.

[0011] Furthermore, the copper strip production wastewater treatment device also includes a collection tank and a first conveying pipe. The first and second liquid outlets are both located on the side of the flotation device away from the first water storage section. One end of the first conveying pipe is connected to the first liquid outlet, and the other end of the first conveying pipe is connected to the third receiving cavity. The liquid outlet of the waste discharge pipe is connected to the liquid inlet of the collection tank, and the liquid outlet of the collection tank is configured to be connected to the sludge treatment system.

[0012] Furthermore, the copper strip production wastewater treatment device also includes a second filtration section, which is located between the first water storage section and the air flotation device. The inlet end of the second filtration section is connected to the first outlet end, and the outlet end of the second filtration section is connected to the first inlet end. The second filtration section is capable of generating bubbles.

[0013] Furthermore, the copper strip production wastewater treatment device also includes a third water storage section connected to the first receiving cavity. The inlet end of the third water storage section is provided with a third filter section, and the outlet end of the third water storage section is connected to the first inlet. The third filter section is used to filter out at least a portion of the emulsified oil in the wastewater to be treated.

[0014] The present invention comprises a first water storage section, an air flotation device, and a first filtration section. The first water storage section has a first receiving cavity for containing wastewater to be treated. The wastewater to be treated in the first receiving cavity enters a second receiving cavity through a first inlet. Air bubbles generated by the air flotation device enter the second receiving cavity. These air bubbles adhere to copper powder, rolling oil, and emulsified oil in the wastewater to form scum. The scum floats on the surface of the wastewater, and most of the scum can be discharged from the second receiving cavity through a waste discharge pipe, thereby significantly removing copper powder, rolling oil, and emulsified oil from the wastewater. After the air flotation operation of the air flotation device, the wastewater to be treated enters the third receiving cavity of the first filtration section through a first outlet. The first filter layer in the third receiving cavity further removes small suspended solids remaining in the wastewater. Through the above configuration, impurities (copper powder, rolling oil, and emulsified oil) in the wastewater can be effectively removed. After being treated by the copper strip production wastewater treatment device of this application, the wastewater can be reused for cleaning copper strips. Because this application uses a combination of "air flotation + filtration", the air flotation device first uses bubbles to quickly remove most of the copper powder, rolling oil and emulsified oil from the wastewater, and then further filters it through the first filter layer in the first filter section to further remove the tiny suspended solids remaining in the wastewater. This achieves deep purification of the wastewater. Therefore, the treated wastewater, when reused, will not cause incomplete cleaning of the copper strip surface or secondary pollution, thus ensuring the product quality of the copper strip.

[0015] The copper strip production wastewater treatment device of this application can solve the problems of low wastewater reuse rate, poor treatment effect, high environmental pressure and high operating cost in the existing technology, realize the deep purification and efficient reuse of cleaning wastewater, reduce fresh water consumption and environmental protection investment, and ensure stable copper strip production quality.

[0016] The copper strip production wastewater treatment device of this application has the following advantages: Through multi-stage deep purification, it significantly improves the wastewater reuse rate, effectively reduces the consumption of fresh water, alleviates water resource shortages, and lowers the enterprise's fresh water procurement costs; suspended solids, oils, dissolved pollutants, and microorganisms in the wastewater are effectively removed, and the produced water quality stably meets the requirements for copper strip cleaning, ensuring the surface cleaning quality of the copper strip and avoiding secondary pollution; it can significantly reduce wastewater discharge and the total amount of pollutants discharged, fully adapting to current stringent environmental emission standards, helping enterprises avoid environmental penalties and improving environmental friendliness; both fresh water procurement costs and wastewater treatment costs are significantly reduced, and each treatment structure is simple, easy to operate, and has low maintenance costs, creating significant economic benefits for enterprises in the long term; adopting a multi-stage treatment collaborative design, it has strong resistance to water quality and quantity shock loads, adapting to the cleaning wastewater treatment needs of copper strip production of different specifications, and can also be extended to similar metal strip cleaning wastewater treatment scenarios, with a wide range of applications. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a copper strip production wastewater treatment device according to an embodiment of the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. First water storage section; 11. First receiving cavity; 12. First level gauge; 13. Second level gauge; 14. Fourth water storage section; 15. First transfer pump; 17. Collection tank; 18. First transfer pipe; 19. Waste discharge pipe; 20. Air flotation device; 21. Second receiving cavity; 30. First filtration section; 31. Third receiving cavity; 40. Ultrafiltration membrane filtration device; 41. First tank; 50. Nanofiltration membrane filtration device; 51. Second tank; 60. Second filtration section; 70. Third water storage section; 80. Third filtration section; 90. Second water storage section; 91. Fifth level gauge; 101. Temporary storage tank; 102. First pressure sensor; 103. Second pressure sensor; 104. Third pressure sensor; 200 201. Second delivery pipe; 202. Third delivery pipe; 203. Fourth delivery pipe; 204. Fifth delivery pipe; 205. Sixth delivery pipe; 206. Second delivery pump; 207. Seventh delivery pipe; 208. Eighth delivery pipe; 209. Tenth delivery pipe; 210. Fourth delivery pump; 211. Third level gauge; 212. Eleventh delivery pipe; 213. Fourth level gauge; 214. Twelfth delivery pipe; 215. Fifth delivery pump; 217. Thirteenth delivery pipe; 218. Sixth delivery pump; 219. Fourteenth delivery pipe; 220. Seventh delivery pump; 221. Fifteenth delivery pipe; 222. Sixteenth delivery pipe; 223. Eighth delivery pump; 224. Ninth delivery pipe. Detailed Implementation

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] In the copper strip production process, the cleaning process is a crucial step in ensuring product surface quality, requiring a large amount of clean water to remove oil, scale, and impurities from the copper strip surface. Currently, the industry mainly uses two methods to treat copper strip cleaning wastewater: one is direct discharge after simple sedimentation, and the other is a crude treatment method of "sedimentation + filtration" followed by small-scale reuse. These treatment methods can only remove some suspended solids and cannot effectively separate dissolved pollutants, tiny impurities, copper powder, and oily substances. The treated water is often insufficient to meet the water quality requirements for copper strip production.

[0023] To solve the above problems, such as Figure 1 As shown, this utility model provides a copper strip production wastewater treatment device, which includes: a first water storage section 10 having a first receiving cavity 11 configured to receive wastewater to be treated; an air flotation device 20 having a second receiving cavity 21, a first inlet, a first outlet, and a second outlet, all of which are connected to the second receiving cavity 21. The first outlet is located at the bottom of the air flotation device 20, and the second outlet is located at the top of the air flotation device 20. The first receiving cavity 11 is connected to the first inlet, and the air flotation device 20 can generate bubbles that can adhere to copper powder, rolling oil, and emulsified oil in the wastewater to be treated and form scum; a waste discharge pipe 19 having its inlet end connected to the second outlet; and a first filter section 30 having a third receiving cavity 31, with the first outlet connected to the third receiving cavity 31, and a first filter layer disposed within the third receiving cavity 31.

[0024] In this embodiment, the first receiving cavity 11 is used to contain the wastewater to be treated (i.e., the wastewater generated during the copper strip cleaning process). The wastewater generated during the copper strip cleaning process can be discharged into the first receiving cavity 11 for subsequent wastewater treatment operations. The wastewater to be treated in the first receiving cavity 11 enters the second receiving cavity 21 through the first liquid inlet. The air flotation device 20 generates air bubbles that enter the second receiving cavity 21. The air bubbles can adhere to the copper powder, rolling oil, and emulsified oil in the wastewater to be treated and form scum. The scum floats on the surface of the wastewater to be treated. Most of the scum can be discharged from the second receiving cavity 21 through the waste discharge pipe 19, thereby significantly removing the copper powder, rolling oil, and emulsified oil from the wastewater to be treated. After the wastewater to be treated passes through the air flotation device 20 (i.e., the generated bubbles react with copper powder, rolling oil and emulsified oil in the wastewater to be treated to form scum), it enters the third receiving cavity 31 of the first filtration section 30 through the first outlet. The first filter layer in the third receiving cavity 31 can further remove the copper powder and dust remaining in the wastewater to be treated.

[0025] After being treated by the copper strip production wastewater treatment device of this application, the wastewater to be treated can be reused for cleaning copper strips. Because this application uses a combination of "air flotation + filtration", it first uses the air bubbles generated by the air flotation device 20 to quickly remove most of the copper powder, rolling oil and emulsified oil from the wastewater, and then further filters it through the first filter layer in the first filter section 30 to further remove the copper powder and dust remaining in the wastewater to be treated. This can achieve deep purification of the wastewater to be treated. Therefore, the treated wastewater can be reused without causing incomplete cleaning of the copper strip surface or secondary pollution, thus ensuring the product quality of the copper strip.

[0026] It should be noted that the scum formed can be scraped off by a scum scraping device of existing technology and then discharged from the discharge pipe 19, so as to achieve preliminary purification of the wastewater to be treated and reduce the pollutant load of the subsequent treatment unit.

[0027] In one embodiment, the air flotation device 20 may employ an existing air flotation machine.

[0028] like Figure 1 As shown, in one embodiment of the present invention, the first filter layer includes a plurality of first filter particles, and the particle size of each first filter particle ranges from 1 mm to 3 mm.

[0029] In this embodiment, the first filter layer is composed of multiple first filter particles, each with a particle size ranging from 1mm to 3mm. This design ensures that the pores of the first filter layer do not create excessive resistance to the wastewater being treated, guaranteeing smooth flow, while also effectively intercepting small suspended solids and incompletely removed oil droplets. This configuration allows the first filter layer to effectively intercept impurities while maintaining a good water treatment flow rate, avoiding frequent cleaning or replacement due to filter layer clogging and reducing maintenance costs.

[0030] like Figure 1 As shown, the third receiving cavity 31 is also provided with a second filter layer and a third filter layer. The third filter layer, the second filter layer and the first filter layer are arranged in order from top to bottom. The second filter layer includes multiple second filter particles, and the particle size of each second filter particle is in the range of 2mm to 3mm. The third filter layer includes multiple third filter particles, and the particle size of each third filter particle is in the range of 3mm to 5mm.

[0031] In this embodiment, the first, second, and third filter layers form a multi-layer filtration system. Filter particles of different sizes are used to progressively intercept impurities in the wastewater. The third filter layer has larger particles, primarily used to intercept larger suspended solids, serving as a preliminary filter. The second filter layer has smaller particles, capable of further removing medium-sized particles. The first filter layer has even smaller particles, used to intercept even smaller suspended solids, achieving deep purification. This progressive filtration method improves impurity removal efficiency. Simultaneously, by using the larger-sized third and second filter layers as pre-filters, a large number of impurities in the wastewater can be effectively blocked and retained, reducing the processing burden on the first filter layer.

[0032] In addition, filter particles of different sizes can form filter layers with different porosities. The larger third filter particles form a third filter layer with higher porosity, reducing water flow resistance and ensuring a higher treatment throughput of the wastewater. The smaller first filter particles form a first filter layer with lower porosity. However, due to the pretreatment of the pre-filter layers (second and third filter layers), the resistance when water flows through is relatively reduced, and good filtration throughput and efficiency can still be maintained.

[0033] In one embodiment of this utility model, the first filter particle is made of garnet, the second filter particle is made of quartz sand, and the third filter particle is made of anthracite.

[0034] In this embodiment, garnet possesses high density and good chemical stability. Its surface charge and porous structure give it a strong adsorption and retention capacity for small particles in water, enabling the first filter layer to remove suspended solids, organic matter, and some metal ions from the wastewater, effectively filtering out minute impurities and residual pollutants. Quartz sand has high hardness and stability, giving the second filter layer good mechanical strength and chemical stability, ensuring its long-term effectiveness. Anthracite is a highly hydrophobic filter material that effectively adsorbs oils and organic matter in water, allowing the third filter layer to remove large suspended solids, oils, and some organic pollutants from the wastewater, reducing the impact of these substances on subsequent filter layers.

[0035] The filter layer, composed of filter particles of different materials, is arranged from top to bottom, ranging from highly hydrophobic anthracite to highly hydrophilic garnet. This optimizes the distribution of water flow within the filter layer, reduces flow resistance, ensures the uniformity and stability of the wastewater as it passes through multiple layers of filtration, and improves filtration efficiency. The combined use of anthracite, quartz sand, and garnet allows for the layered interception and removal of pollutants of different particle sizes and types, reducing wear and clogging of individual filter layers, extending the service life of the first filter section 30, and lowering maintenance and replacement costs.

[0036] As can be seen from the above, the interception effect of the first filter particles, the second filter particles, and the third filter particles can further remove tiny impurities and suspended solids in the wastewater to be treated, ensuring the stable operation of the subsequent treatment device and avoiding the impact of impurities on the treatment efficiency of the subsequent treatment device.

[0037] In one embodiment of this utility model, the thickness of the first filter layer is L1, the thickness of the second filter layer is L2, and the thickness of the third filter layer is L3. The value range of the thickness L1 of the first filter layer is 0.5mm≤L1≤1.5mm, the value range of the thickness L2 of the second filter layer is 1.5mm≤L2≤2.0mm, and the value range of the thickness L3 of the third filter layer is 1.5mm≤L3≤2.0mm.

[0038] The above settings ensure the removal of impurities from the wastewater and also guarantee the long-term stable operation of the first filtration unit 30 without frequent shutdowns for maintenance.

[0039] like Figure 1 As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes an ultrafiltration membrane filtration device 40 and a nanofiltration membrane filtration device 50. The ultrafiltration membrane filtration device 40 and the nanofiltration membrane filtration device 50 are arranged sequentially along the conveying direction of the wastewater to be treated. The first filtration section 30 also has a third liquid outlet communicating with the third receiving cavity 31. The liquid inlet of the ultrafiltration membrane filtration device 40 is connected to the third liquid outlet, and the liquid outlet of the ultrafiltration membrane filtration device 40 is connected to the liquid inlet of the nanofiltration membrane filtration device 50.

[0040] In this embodiment, the wastewater to be treated in the third receiving cavity 31 enters the ultrafiltration membrane filtration device 40 through the third outlet. The ultrafiltration membrane filtration device 40 can effectively remove suspended particles (e.g., plastic particles), copper powder, etc. in the wastewater to be treated, further purifying the water quality. Subsequently, the wastewater to be treated enters the nanofiltration membrane filtration device 50 through the outlet of the ultrafiltration membrane filtration device 40. The nanofiltration membrane filtration device 50 can remove smaller dissolved organic matter and copper ions, etc., to achieve deep purification.

[0041] like Figure 1As shown, in one embodiment of the present invention, the ultrafiltration membrane filtration device 40 includes a first tank connected to a third outlet and an ultrafiltration membrane disposed in the first tank. The pore size of the ultrafiltration membrane ranges from 20μm to 50μm. The nanofiltration membrane filtration device 50 includes a second tank 51 connected to the outlet of the first tank and a nanofiltration membrane disposed in the second tank 51. The pore size of the nanofiltration membrane ranges from 0.2μm to 1μm.

[0042] In this embodiment, the wastewater to be treated in the third receiving cavity 31 enters the first tank 41 through the third outlet. The ultrafiltration membrane in the first tank 41 can effectively remove suspended particles (e.g., plastic particles), copper powder, etc., from the wastewater to be treated, further purifying the water quality. Subsequently, the wastewater to be treated enters the second tank 51 through the outlet of the first tank 41. The nanofiltration membrane in the second tank 51 can remove smaller dissolved organic matter and copper ions, achieving deep purification.

[0043] Ultrafiltration membranes, with pore sizes ranging from 20 μm to 50 μm, can effectively intercept suspended particles (e.g., plastic particles), copper powder, etc., in the wastewater to be treated, which can greatly improve the cleanliness of the effluent and lay the foundation for subsequent deep purification. Nanofiltration membranes, with pore sizes ranging from 0.2 μm to 1 μm, can further remove small molecule organic matter such as copper ions and other possible heavy metal ions from the wastewater to be treated.

[0044] It should be noted that both ultrafiltration and nanofiltration membranes can utilize existing technologies, and their specific structures will not be detailed here. Through the retention characteristics of ultrafiltration and nanofiltration membranes, residual dissolved organic matter, heavy metal ions, and microorganisms in the wastewater can be removed, ensuring that the produced water quality meets the standard requirements for copper strip cleaning water.

[0045] like Figure 1 As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a second water storage section 90, the inlet end of the second water storage section 90 being connected to the outlet end of the nanofiltration membrane filtration device 50.

[0046] In this embodiment, the second water storage unit 90 serves as a storage container for purified water after nanofiltration, playing a role in water quality stabilization and buffering. The second water storage unit 90 also provides installation space for online water quality monitoring equipment, such as pH meters, conductivity meters, and turbidity meters.

[0047] like Figure 1As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a collection tank 17 and a first conveying pipe 18. The first outlet and the second outlet are both located on the side of the air flotation device 20 away from the first water storage section 10. One end of the first conveying pipe 18 is connected to the first outlet, and the other end of the first conveying pipe 18 is connected to the third receiving cavity 31. The outlet end of the waste discharge pipe 19 is connected to the inlet end of the collection tank 17. The outlet end of the collection tank 17 is configured to be connected to the sludge treatment system.

[0048] In this embodiment, the scum formed by the bubbles and copper powder, rolling oil, and emulsified oil in the wastewater to be treated floats on the surface of the wastewater. The second outlet of the flotation device 20 is located at its top, and one end of the second conveying pipe is connected to the second outlet. This allows the scum in the second receiving cavity 21 to be discharged to the collection tank 17, achieving effective solid-liquid separation and preventing the scum from being mixed into subsequent treatment stages again, thus affecting the purification effect.

[0049] The scum collected in collection tank 17 is connected to the sludge treatment system through its outlet for centralized treatment. This not only reduces environmental pollution but also facilitates the resource utilization of sludge, such as extracting valuable substances (e.g., metal ions, oils) for recycling and reuse, or using the treated sludge to produce soil conditioners, brick raw materials, etc. The first outlet is located at the bottom of the flotation device 20, which significantly reduces the probability of scum in the wastewater being discharged into the third containment chamber 31. The wastewater to be treated in the second containment chamber 21 is transported to the third containment chamber 31 through the first conveying pipe 18 for further deep purification.

[0050] It should be noted that the sludge treatment system can use existing technology, and the specific structure will not be described here.

[0051] like Figure 1 As shown in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a second filter section 60. The second filter section 60 is disposed between the first water storage section 10 and the air flotation device 20. The inlet end of the second filter section 60 is connected to the first outlet end, and the outlet end of the second filter section 60 is connected to the first inlet end. The second filter section 60 is capable of generating bubbles.

[0052] In this embodiment, the second filter section 60 is located before the air flotation device 20 and can serve as a pretreatment unit. The bubbles generated by the second filter section 60 can bring the impurities settled at the bottom of the wastewater to the surface, which can increase the removal probability of the sedimented impurities in the subsequent treatment process, reduce the conveying pressure, and reduce the energy consumption during the conveying of the wastewater.

[0053] In one embodiment, both the second filtration unit 60 and the third filtration unit 80 can be the existing HYS type high-efficiency greywater treatment equipment, specifically model HYS-1-30.

[0054] like Figure 1 As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a third water storage section 70 connected to the first receiving cavity 11. The inlet end of the third water storage section 70 is provided with a third filter section 80, and the outlet end of the third water storage section 70 is connected to the first inlet. The third filter section 80 is used to filter out at least a portion of the emulsified oil in the wastewater to be treated.

[0055] In this embodiment, emulsified oil is a common pollutant in copper strip cleaning wastewater. Because its oil droplets are extremely small and form a stable emulsion with the water, traditional filtration methods are difficult to use effectively to remove it. This application provides a third filter section 80 at the inlet end of the third water storage section 70, so that the wastewater to be treated in the first receiving cavity 11 passes through the third filter section 80 before entering the third water storage section 70. The third filter section 80 can remove at least a portion of the emulsified oil in the wastewater to be treated, achieving preliminary impurity removal. After at least a portion of the emulsified oil in the wastewater to be treated is removed, it is discharged through the outlet end of the third water storage section 70 to the second receiving cavity 21 for subsequent impurity removal operations. Through the above arrangement, the energy consumption of the subsequent treatment unit (air flotation device 20) can be reduced.

[0056] like Figure 1 As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a second conveying pipe 200, a third conveying pipe 201, a fourth conveying pipe 202, a fifth conveying pipe 203, two first conveying pumps 15, and a first level gauge 12. The second conveying pipe 200 is connected to the first receiving cavity 11. The inlet ends of the third conveying pipe 201 and the fourth conveying pipe 202 are selectively connected to the second conveying pipe 200. A first conveying pump 15 is provided on each of the third conveying pipe 201 and the fourth conveying pipe 202. The outlet ends of the third conveying pipe 201 and the fourth conveying pipe 202 are selectively connected to the inlet end of the fifth conveying pipe 203. The outlet end of the fifth conveying pipe 203 is connected to the inlet end of the third filter section 80.

[0057] The wastewater to be treated in the first receiving cavity 11 can be transported through the second conveying pipe 200 to the third conveying pipe 201 or the fourth conveying pipe 202, and then through the fifth conveying pipe 203 to the third filtration section 80. One of the third conveying pipe 201 and the fourth conveying pipe 202 can be used as a working pipe, and the other can be used as a backup pipe. Similarly, one of the two first conveying pumps 15 is used as a working pump, and the other of the two first conveying pumps 15 is used as a backup pump. The first level gauge 12 is installed on the third water storage section 70 to detect the liquid level in the third water storage section 70.

[0058] The copper strip production wastewater treatment device also includes a sixth conveying pipe 204, a seventh conveying pipe 206, and two second conveying pumps 205. One second conveying pump 205 is installed on the sixth conveying pipe 204, and the other second conveying pump 205 is installed on the seventh conveying pipe 206. One end of the sixth conveying pipe 204 is connected to the third water storage section 70, and the other end of the sixth conveying pipe 204 is connected to the second filter section 60. The liquid inlet end of the seventh conveying pipe 206 is optionally connected to the sixth conveying pipe 204. If the second conveying pump 205 installed on the sixth conveying pipe 204 is damaged, the second conveying pump 205 installed on the seventh conveying pipe 206 can be activated. At this time, by connecting the liquid inlet end of the seventh conveying pipe 206 to the sixth conveying pipe 204, the wastewater to be treated in the third water storage section 70 can be transported to the second filter section 60.

[0059] like Figure 1 As shown in one embodiment of this utility model, the copper strip production wastewater treatment device further includes a second level gauge 13, an eighth conveying pipe 207, a ninth conveying pipe 224, and two third conveying pumps 208. The second level gauge 13 is installed on the collection tank 17 and is used to detect the liquid level in the collection tank 17. One end of the eighth conveying pipe 207 is connected to the outlet end of the collection tank 17, and the other end of the eighth conveying pipe 207 can be connected to the sludge treatment system to discharge the wastewater to be treated in the collection tank 17 to the sludge treatment system. The inlet end of the ninth conveying pipe 224 is optionally connected to the eighth conveying pipe 207. One of the two third conveying pumps 208 is installed on the eighth conveying pipe 207, and the other of the two third conveying pumps 208 is installed on the ninth conveying pipe 224. If the third pump 208 installed on the eighth conveying pipe 207 is damaged, the third pump 208 installed on the ninth conveying pipe 224 can be activated. In this case, the inlet end of the ninth conveying pipe 224 can be connected to the ninth conveying pipe 224 to transport the wastewater to be treated in the collection tank 17 to the sludge treatment system.

[0060] like Figure 1 As shown in one embodiment of this utility model, the copper strip production wastewater treatment device further includes a fourth water storage section 14, a tenth conveying pipe 209, a fourth conveying pump 210, and a third level gauge 211. One end of the tenth conveying pipe 209 is connected to the third receiving cavity 31, and the other end of the tenth conveying pipe 209 is connected to the fourth water storage section 14. The fourth conveying pump 210 is installed on the tenth conveying pipe 209 and is used to convey the wastewater to be treated in the third receiving cavity 31 to the fourth water storage section 14. The third level gauge 211 is installed on the fourth water storage section 14 and is used to detect the liquid level in the fourth water storage section 14. The fourth water storage section 14 is used to temporarily store the wastewater to be treated after being treated by the first filtration section 30.

[0061] The copper strip production wastewater treatment device also includes an eleventh delivery pipe 212, a fourth level gauge 213, a twelfth delivery pipe 214, and two fifth delivery pumps 215. One end of the eleventh delivery pipe 212 is connected to the fourth water storage section 14, and the other end is connected to the first tank 41. One of the fifth delivery pumps 215 is installed on the eleventh delivery pipe 212 to transport the wastewater to be treated in the fourth water storage section 14 to the first tank 41. The inlet end of the twelfth delivery pipe 214 is optionally connected to the eleventh delivery pipe 212. The other fifth delivery pump 215 is installed on the twelfth delivery pipe 214. If the fifth delivery pump 215 installed on the eleventh delivery pipe 212 is damaged, the fifth delivery pump 215 installed on the twelfth delivery pipe 214 can be activated. In this case, by connecting the inlet end of the twelfth delivery pipe 214 to the eleventh delivery pipe 212, the wastewater to be treated in the fourth water storage section 14 can be transported to the first tank 41.

[0062] like Figure 1 As shown, in one embodiment of this utility model, the copper strip production wastewater treatment device further includes a thirteenth conveying pipe 217, a sixth conveying pump 218, a fourteenth conveying pipe 219, a fifth level gauge 91, and a seventh conveying pump 220. One end of the thirteenth conveying pipe 217 is connected to the first tank 41, and the other end of the fourteenth conveying pipe 219 is connected to the inlet end of the second tank 51. The sixth conveying pump 218 is installed on the thirteenth conveying pipe 217 to convey the wastewater to be treated in the first tank 41 to the second tank 51. One end of the fourteenth conveying pipe 219 is connected to the outlet end of the second tank 51, and the other end of the fourteenth conveying pipe 219 is connected to the second water storage section 90. The seventh conveying pump 220 is installed on the fourteenth conveying pipe 219 to convey the wastewater to be treated in the second tank 51 to the second water storage section 90. The fifth level gauge 91 is installed on the second water storage section 90 to detect the liquid level in the second water storage section 90.

[0063] like Figure 1As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a fifteenth conveying pipe 221, a sixteenth conveying pipe 222, and two eighth conveying pumps 223. One end of the fifteenth conveying pipe 221 is connected to the second water storage section 90, and the other end of the fifteenth conveying pipe 221 is configured to connect to the water node of the copper strip cleaning line. One of the eighth conveying pumps 223 is installed on the fifteenth conveying pipe 221 to convey the wastewater to be treated in the second water storage section 90 to the water node of the copper strip cleaning line, thereby realizing the reuse of the wastewater to be treated. If the inlet end of the sixteenth delivery pipe 222 is selectively connected to the fifteenth delivery pipe 221, and if the eighth delivery pump 223 installed on the fifteenth delivery pipe 221 is damaged, the eighth delivery pump 223 installed on the sixteenth delivery pipe 222 can be activated. At this time, by connecting the inlet end of the sixteenth delivery pipe 222 to the fifteenth delivery pipe 221, the wastewater to be treated in the second water storage section 90 can be transported to the water-using node of the copper strip cleaning line. The wastewater to be treated in the second water storage section 90 can be transported to the corresponding location according to the needs of each water-using node of the copper strip cleaning line.

[0064] It should be noted that the optional connections between the delivery pipes mentioned in this application can all be achieved through a three-way valve.

[0065] Existing wastewater treatment devices have the following drawbacks: low wastewater reuse rate, with large amounts of pre-treated wastewater being directly discharged, failing to achieve water resource recycling and increasing fresh water procurement costs; simple sedimentation and filtration cannot remove tiny suspended solids, emulsified oil, and some dissolved pollutants from the wastewater, resulting in poor reclaimed water quality, which can lead to incomplete cleaning of the copper strip surface and even secondary pollution, affecting product quality; although the directly discharged wastewater undergoes simple treatment, there is still a risk of pollutant exceeding standards, making it difficult to meet increasingly stringent environmental emission standards and exposing enterprises to potential environmental penalties; high operating costs: the combined costs of large amounts of tap water consumption and wastewater treatment, along with the need for frequent equipment maintenance due to the extensive treatment process, further increase the enterprise's production and operating costs.

[0066] The copper strip production wastewater treatment device of this application treats the copper strip production wastewater (i.e., wastewater to be treated) and allows it to be reused as recycled water, which can then be transported back to the water usage points of the copper strip cleaning line, realizing the recycling of water resources, reducing the use of fresh water, and lowering water costs. Secondly, the wastewater treated by this copper strip production wastewater treatment device effectively removes tiny suspended solids, emulsified oil, and some dissolved pollutants. As recycled water, it will not cause incomplete cleaning of the copper strip surface or secondary pollution. Compared to existing technologies, it eliminates the risk of pollutant exceeding standards, adapts to increasingly stringent environmental emission standards, avoids potential environmental penalties for enterprises, and has lower operating costs, requiring less frequent equipment maintenance and reducing the enterprise's production and operating costs.

[0067] In one embodiment of this utility model, the first water storage section 10, the second water storage section 90, the third water storage section 70 and the fourth water storage section 14 are all equipped with stirring devices, which can balance the water quality and quantity of wastewater, avoid the impact load on subsequent treatment units due to fluctuations in water quality and quantity, and ensure the stable operation of the treatment system.

[0068] It should be noted that the stirring device can use existing technology, and the specific structure will not be described here.

[0069] In one embodiment of this utility model, the copper strip production wastewater treatment device further includes a flocculant storage tank and a coagulant aid storage tank. The outlet ends of both the flocculant storage tank and the coagulant aid storage tank are connected to the second receiving cavity 21. The addition of flocculant and coagulant aid can significantly increase the aggregation speed of suspended solids in the wastewater to be treated, so that fine suspended solids can quickly form larger flocs, which are easy to form scum with the air bubbles generated by the flotation device 20, thereby improving the overall efficiency of wastewater treatment.

[0070] In one embodiment of this utility model, the first water storage unit 10, the second water storage unit 90, the third water storage unit 70 and the fourth water storage unit 14 are all equipped with online water quality monitoring devices to monitor water quality indicators (such as pH value, pollutant content, etc.) in real time, ensuring that the water quality is qualified before reuse. If water quality abnormalities occur, feedback can be given in time and the treatment process can be adjusted.

[0071] It should be noted that the online monitoring device can use existing technology.

[0072] In one embodiment, the online monitoring device includes a pH sensor, a BOD (biochemical oxygen demand) monitor, and a COD (chemical oxygen demand) monitor. The BOD monitor and COD monitor are used to assess the degree of organic pollution in the water body, and their specific structures will not be described in detail here.

[0073] like Figure 1 As shown, in one embodiment of the present invention, the copper strip production wastewater treatment device further includes a constant pressure water supply system. The constant pressure water supply system includes a control system, a temporary storage tank 101, a first pressure sensor 102, a second pressure sensor 103, and a third pressure sensor 104. The first pressure sensor 102, the second pressure sensor 103, and the third pressure sensor 104 are all communicatively connected to the control system.

[0074] The inlet of the temporary storage tank 101 is connected to the fifteenth delivery pipe 221. The first pressure sensor 102 and the second pressure sensor 103 are both installed on the temporary storage tank 101. Some of the wastewater to be treated in the fifteenth delivery pipe 221 will flow into the temporary storage tank 101. The first pressure sensor 102, the second pressure sensor 103 and the third pressure sensor 104 are all used to detect the pressure of the fifteenth delivery pipe 221. Real-time monitoring of the pressure changes in the fifteenth delivery pipe 221 allows operators to understand the pressure status of the wastewater flowing through the fifteenth delivery pipe 221 in an instant, promptly detect and resolve possible blockages, leaks or pump failures, and ensure timely detection of any situations that may cause abnormal pressure fluctuations, such as blockages or sudden increases in demand, thereby taking measures to prevent equipment damage and reduce maintenance costs.

[0075] When any one of the first pressure sensor 102, the second pressure sensor 103, and the third pressure sensor 104 detects an abnormal pressure in the fifteenth delivery pipe 221, the control system sends a control signal to stop the delivery pump.

[0076] In one embodiment, the copper strip production wastewater treatment device further includes a control valve, which is installed on the fifteenth delivery pipe 221. This configuration ensures stable water supply pressure, meeting the continuous water pressure requirements of the cleaning process. Specifically, the control valve is a pressure reducing valve or a butterfly valve.

[0077] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: A first water storage section, an air flotation device, and a first filtration section are provided. The first water storage section has a first receiving cavity for containing wastewater to be treated. The wastewater to be treated in the first receiving cavity enters the second receiving cavity through a first inlet. Air bubbles generated by the air flotation device enter the second receiving cavity. These air bubbles can adhere to copper powder, rolling oil, and emulsified oil in the wastewater to be treated, forming scum. The scum floats on the surface of the wastewater to be treated, and most of the scum can be discharged from the second receiving cavity through a waste discharge pipe, thereby significantly removing copper powder, rolling oil, and emulsified oil from the wastewater to be treated. After the air flotation operation of the air flotation device, the wastewater to be treated enters the third receiving cavity of the first filtration section through a first outlet. The first filter layer in the third receiving cavity can further remove tiny suspended solids remaining in the wastewater to be treated. Through the above arrangement, impurities (copper powder, rolling oil, and emulsified oil) in the wastewater can be effectively removed. After being treated by the copper strip production wastewater treatment device of this application, the wastewater can be reused for cleaning copper strips. Because this application uses a combination of "air flotation + filtration", the air flotation device first uses bubbles to quickly remove most of the copper powder, rolling oil and emulsified oil from the wastewater, and then further filters it through the first filter layer in the first filter section to further remove the tiny suspended solids remaining in the wastewater. This achieves deep purification of the wastewater. Therefore, the treated wastewater, when reused, will not cause incomplete cleaning of the copper strip surface or secondary pollution, thus ensuring the product quality of the copper strip.

[0078] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0079] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0080] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wastewater treatment device for copper strip production, characterized in that, include: The first water storage section (10) has a first receiving cavity (11) configured to receive wastewater to be treated; The air flotation device (20) has a second receiving cavity (21), a first liquid inlet, a first liquid outlet and a second liquid outlet. The first liquid inlet, the first liquid outlet and the second liquid outlet are all connected to the second receiving cavity (21). The first liquid outlet is located at the bottom of the air flotation device (20) and the second liquid outlet is located at the top of the air flotation device (20). The first receiving cavity (11) is connected to the first liquid inlet. The air flotation device (20) can generate bubbles. The bubbles can adhere to the copper powder, rolling oil and emulsified oil in the wastewater to be treated and form scum. Waste discharge pipe (19), the inlet end of which is connected to the second outlet; The first filter section (30) has a third receiving cavity (31), the first liquid outlet is connected to the third receiving cavity (31), and a first filter layer is provided in the third receiving cavity (31); The first filter layer includes multiple first filter particles, each with a particle size ranging from 1mm to 3mm. The third receiving cavity (31) is further provided with a second filter layer and a third filter layer. The third filter layer, the second filter layer, and the first filter layer are arranged sequentially from top to bottom. The second filter layer includes multiple second filter particles, each with a particle size ranging from 2mm to 3mm. The third filter layer includes multiple third filter particles, each with a particle size ranging from 3mm to 5mm. The thickness of the first filter layer is L1, the thickness of the second filter layer is L2, and the thickness of the third filter layer is L3. The thickness of the first filter layer L1 ranges from 0.5mm ≤ L1 ≤ 1.5mm, the thickness of the second filter layer L2 ranges from 1.5mm ≤ L2 ≤ 2.0mm, and the thickness of the third filter layer L3 ranges from 1.5mm ≤ L3 ≤ 2.0mm.

2. The copper strip production wastewater treatment device according to claim 1, characterized in that, The first filter particles are made of garnet, the second filter particles are made of quartz sand, and the third filter particles are made of anthracite.

3. The copper strip production wastewater treatment device according to claim 1 or 2, characterized in that, The copper strip production wastewater treatment device further includes an ultrafiltration membrane filtration device (40) and a nanofiltration membrane filtration device (50). The ultrafiltration membrane filtration device (40) and the nanofiltration membrane filtration device (50) are arranged sequentially along the conveying direction of the wastewater to be treated. The first filtration section (30) also has a third outlet that communicates with the third receiving cavity (31). The inlet end of the ultrafiltration membrane filtration device (40) is connected to the third outlet, and the outlet end of the ultrafiltration membrane filtration device (40) is connected to the inlet end of the nanofiltration membrane filtration device (50).

4. The copper strip production wastewater treatment device according to claim 3, characterized in that, The ultrafiltration membrane filtration device (40) includes a first tank (41) connected to the third outlet and an ultrafiltration membrane disposed in the first tank (41), the pore size of the ultrafiltration membrane being in the range of 20μm~50μm; the nanofiltration membrane filtration device (50) includes a second tank (51) connected to the outlet of the first tank (41) and a nanofiltration membrane disposed in the second tank (51), the pore size of the nanofiltration membrane being in the range of 0.2μm~1μm; and / or, the copper strip production wastewater treatment device further includes a second water storage section (90), the inlet of the second water storage section (90) being connected to the outlet of the nanofiltration membrane filtration device (50).

5. The copper strip production wastewater treatment device according to claim 1 or 2, characterized in that, The copper strip production wastewater treatment device also includes a collection tank (17) and a first conveying pipe (18). The first outlet and the second outlet are both located on the side of the air flotation device (20) away from the first water storage section (10). One end of the first conveying pipe (18) is connected to the first outlet, and the other end of the first conveying pipe (18) is connected to the third receiving cavity (31). The outlet end of the waste discharge pipe (19) is connected to the inlet end of the collection tank (17), and the outlet end of the collection tank (17) is configured to be connected to the sludge treatment system.

6. The copper strip production wastewater treatment device according to claim 1 or 2, characterized in that, The copper strip production wastewater treatment device further includes a second filter section (60), which is disposed between the first water storage section (10) and the air flotation device (20). The inlet end of the second filter section (60) is connected to the first outlet, and the outlet end of the second filter section (60) is connected to the first inlet. The second filter section (60) is capable of generating bubbles.

7. The copper strip production wastewater treatment device according to claim 1 or 2, characterized in that, The copper strip production wastewater treatment device further includes a third water storage section (70) connected to the first receiving cavity (11). The inlet end of the third water storage section (70) is provided with a third filter section (80). The outlet end of the third water storage section (70) is connected to the first inlet. The third filter section (80) is used to filter out at least part of the emulsified oil in the wastewater to be treated.

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