Treatment device for treating sewage containing heavy metals and sewage treatment system

Abstract

The utility model discloses a treatment device for treating sewage containing heavy metals and a sewage treatment system, the treatment device comprises a pool body, and a water inlet area, a separation area and a purification area which are sequentially arranged and connected along the water flow direction are arranged in the pool body; the screen is arranged in the water inlet area; the bent separation wall is arranged in the purification area so as to divide the purification area into a first flow channel and a second flow channel; the equipotential electric plate and the parallel magnetic plate are arranged in the separation area and are used for adsorbing and separating at least part of positive metal ions and metal oxides in the sewage to the first flow channel, so that the positive metal ion concentration of the first flow channel is greater than that of the second flow channel, and the sewage in the first flow channel is subjected to dosing purification treatment; and sewage in the second flow channel is treated by the purification membrane. According to the treatment device disclosed by the utility model, the comprehensive treatment of the sewage is realized, the sewage treatment efficiency is improved, the sewage treatment cost is reduced, and the emission pollution is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially, it is a kind of treatment device and sewage treatment system for treating heavy metal-containing sewage. BACKGROUND

[0002] Traditional sewage treatment method often faces technical bottleneck when dealing with heavy metal pollution, and shows certain limitation. Common physical treatment method, such as sedimentation, filtration and adsorption, although can remove part of heavy metal to some extent, but when facing high concentration pollutants or mixed pollution of multiple heavy metals, the effect is often unsatisfactory. For example, although sedimentation method is simple, it is only applicable to some metal ions that can form sediment, and the processing efficiency is low;And the removal effect of filtration method on heavy metal ions is limited, especially for the treatment effect of dissolved heavy metal is poor. In addition, although chemical method can achieve certain effect by reducing, oxidizing or precipitating reaction to remove heavy metal, these methods usually need a large amount of chemical reagent, and the cost is high, and it may cause secondary pollution, further aggravate environmental burden. Although biological treatment method has certain advantages in treating low concentration heavy metal sewage, but for high concentration sewage or multiple heavy metal combined pollution, the treatment effect of biological method is often limited, and the processing period is long. In general, traditional technology often cannot completely meet the requirements of heavy metal pollution control in practical application, and needs to improve the processing efficiency and reduce the processing cost through innovative technology. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art. To this end, the utility model provides a kind of treatment device for treating heavy metal-containing sewage, and the treatment device for treating heavy metal-containing sewage realizes the comprehensive treatment of sewage, improves the processing efficiency of sewage, reduces the cost of sewage treatment, and reduces the pollution of discharge.

[0004] The utility model further provides a kind of sewage treatment system, including the treatment device described above.

[0005] The treatment device for treating heavy metal-containing sewage according to the utility model embodiment, including: pool body, the pool body has water inlet area, separation zone and purification zone sequentially arranged and connected along water flow direction in it;Screening net, the screening net is located in the water inlet area;Bent isolation wall, the bent isolation wall is located in the purification zone, to divide the purification zone into first flow channel and second flow channel;Equilibrium electric plate and parallel magnetic plate, the equilibrium electric plate and the parallel magnetic plate are located in the separation zone, for at least part of positive metal ions and metal oxide in sewage are adsorbed and separated to the first flow channel, so that the first flow channel positive metal ion concentration is greater than the positive metal ion concentration of the second flow channel, the sewage in the first flow channel is treated by dosing purification, and the sewage in the second flow channel is treated by purification membrane.

[0006] According to an embodiment of the present invention, a treatment device for treating wastewater containing heavy metals comprises an inlet zone, a separation zone, and a purification zone arranged sequentially and connected along the water flow direction in a pool body. A screen is disposed in the inlet zone; a bent isolation wall is disposed in the purification zone to divide the purification zone into a first flow channel and a second flow channel; a equipotential plate and a parallel magnetic plate are disposed in the separation zone to adsorb and separate at least some positively charged metal ions and metal oxides in the wastewater to the first flow channel, so that the concentration of positive metal ions in the first flow channel is greater than that in the second flow channel. The wastewater in the first flow channel is purified by adding chemicals, and the wastewater in the second flow channel is treated by a purification membrane, thereby achieving comprehensive treatment of wastewater, which not only improves the wastewater treatment efficiency and reduces the cost of wastewater treatment, but also reduces pollution discharge.

[0007] In some embodiments of this utility model, the side of the water inlet area away from the separation area has a water inlet overflow port, the screen is disposed at the end of the water inlet area away from the separation area, and is disposed on the side of the water inlet overflow port facing the water inlet area, and the processing device further includes: a screen support, the screen support is disposed in the water inlet area, and is used to fix the screen.

[0008] In some embodiments of this utility model, there are two equalizing plates and two parallel magnetic plates, with the two equalizing plates respectively disposed at the upper and lower ends of the separation zone, and the two parallel magnetic plates respectively disposed at the upper and lower ends of the separation zone. The processing device further includes a scraper cleaning system, which is disposed at one of the upper and lower ends of the separation zone.

[0009] In some embodiments of this utility model, the two equalizing plates are a positive electrode plate and a negative electrode plate, and the two parallel magnetic plates are an S-pole magnetic plate and an N-pole magnetic plate, respectively. The negative electrode plate, the S-pole magnetic plate, the scraper cleaning system, and the first flow channel are located at the same end of the upper and lower ends.

[0010] In some embodiments of this utility model, the scraper cleaning system includes: a scraper bracket, which is disposed on the pool body and has a slide rail extending along the water flow direction; and a scraper, which is movably disposed on the slide rail along the length direction of the slide rail.

[0011] In some embodiments of this utility model, the parallel magnetic plate is fixed to the pool body, and the equalizing plate is fixed to the parallel magnetic plate.

[0012] In some embodiments of this utility model, the first flow channel has a first turbulence plate and a second turbulence plate, the size of the first turbulence plate being larger than the size of the second turbulence plate; and / or, it further includes: a dosing device and a dosing pipe, the dosing device and the dosing pipe being disposed on the pool body, the dosing device being connected to the first flow channel through the dosing pipe.

[0013] In some embodiments of this utility model, the purification membrane is disposed in the second flow channel, and the purification membrane includes an ultrafiltration membrane and a reverse osmosis membrane.

[0014] In some embodiments of this utility model, the ultrafiltration membrane is disposed upstream of the reverse osmosis membrane along the water flow direction.

[0015] In some embodiments of this utility model, the treatment device for treating wastewater containing heavy metals further includes: an outlet pipe, which is located at the end of the pool body along the water flow direction and is connected to the first flow channel; and an outlet overflow plate, which is located at the end of the pool body along the water flow direction and is connected to the second flow channel.

[0016] In some embodiments of this utility model, along the water flow direction, the bending angle of the bent isolation wall gradually increases, and the cross-section of the first flow channel gradually decreases.

[0017] In some embodiments of this utility model, the surfaces of the equalizing plate and the parallel magnetic plate have an anti-corrosion coating layer.

[0018] In some embodiments of this utility model, the treatment device for treating wastewater containing heavy metals further includes: a ladder, which is installed on the pool body.

[0019] The wastewater treatment system according to an embodiment of the present invention includes the above-described treatment device for treating wastewater containing heavy metals.

[0020] According to the wastewater treatment system of this utility model embodiment, by setting up the above-mentioned treatment device for treating wastewater containing heavy metals, the tank has an inlet zone, a separation zone, and a purification zone arranged sequentially and connected along the water flow direction. A screen is set in the inlet zone; a bent isolation wall is set in the purification zone to divide the purification zone into a first flow channel and a second flow channel; a equipotential plate and a parallel magnetic plate are set in the separation zone to adsorb and separate at least some positively charged metal ions and metal oxides in the wastewater to the first flow channel, so that the concentration of positive metal ions in the first flow channel is greater than that in the second flow channel. The wastewater in the first flow channel is purified by adding chemicals, and the wastewater in the second flow channel is treated by a purification membrane, thereby achieving comprehensive treatment of wastewater, which not only improves the wastewater treatment efficiency and reduces the cost of wastewater treatment, but also reduces pollution discharge.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of a treatment device for treating wastewater containing heavy metals according to an embodiment of the present invention.

[0024] Figure label:

[0025] 10. Processing device;

[0026] 1. Tank body; 11. Inlet zone; 111. Inlet overflow port; 12. Separation zone; 13. Purification zone; 131. First flow channel; 132. Second flow channel; 133. First turbulence plate; 134. Second turbulence plate; 135. Purification membrane; 1351. Ultrafiltration membrane; 1352. Reverse osmosis membrane;

[0027] 21. Screen; 22. Screen support;

[0028] 3. Bending the partition wall;

[0029] 41. Equal potential plate; 411. Positive plate; 412. Negative plate; 42. Parallel magnetic plate; 421. S pole magnetic plate; 422. N pole magnetic plate;

[0030] 5. Scraper cleaning system; 51. Scraper bracket; 52. Scraper;

[0031] 61. Dosing device; 62. Dosing pipe;

[0032] 71. Water outlet pipe; 72. Water outlet overflow plate;

[0033] 8. Climbing ladders. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The following is for reference. Figure 1 - Figure 10 illustrates a treatment apparatus 10 for treating wastewater containing heavy metals according to an embodiment of the present invention.

[0038] like Figure 1 As shown, the treatment device 10 for treating wastewater containing heavy metals according to an embodiment of the present invention includes: a pool body 1, a screen 21, a bent isolation wall 3, a equipotential plate 41, and a parallel magnetic plate 42.

[0039] Specifically, refer to Figure 1 The pool 1 has an inlet zone 11, a separation zone 12 and a purification zone 13 arranged and connected in sequence along the water flow direction; a screen 21 is provided in the inlet zone 11; the inlet zone 11 is used to receive sewage. When sewage enters the inlet zone 11, it can filter out larger particles of impurities through the screen 21, thereby reducing the subsequent treatment cost and treatment time of sewage and improving the subsequent treatment efficiency of sewage.

[0040] Furthermore, such as Figure 1As shown, the bent isolation wall 3 is provided in the purification zone 13 to divide the purification zone 13 into a first flow channel 131 and a second flow channel 132; the equalizing plate 41 and the parallel magnetic plate 42 are provided in the separation zone 12 to adsorb and separate at least some of the positively charged metal ions and metal oxides in the sewage to the first flow channel 131, so that the concentration of positive metal ions in the first flow channel 131 is greater than the concentration of positive metal ions in the second flow channel 132. The sewage in the first flow channel 131 is treated by adding chemicals for purification, and the sewage in the second flow channel 132 is treated by the purification membrane 135.

[0041] Understandably, when the wastewater filtered by the screen 21 enters the separation zone 12, the electric field generated by the equalizing plate 41 and the magnetic field generated by the parallel magnetic plate 42 cause the positively charged heavy metal ions and metal oxides to migrate directionally to the first flow channel 131. At this time, since most of the positively charged heavy metal ions and metal oxides flow to the first flow channel 131, the concentration of positive metal ions in the second flow channel 132 is low. At the same time, due to the presence of the bent isolation wall 3, the wastewater in the first flow channel 131 and the wastewater in the second flow channel 132 can be prevented from mixing.

[0042] By selecting appropriate treatment methods based on the different concentrations of positive metal ions in the first flow channel 131 and the second flow channel 132, treatment costs can be reduced and treatment efficiency improved. Specifically, the first flow channel 131 has a higher concentration of positive metal ions, so chemical purification is chosen for treatment, resulting in good treatment effect and high efficiency. Chemical purification involves adding chemical agents to cause the positive metal ions in the wastewater to form precipitates. Meanwhile, the purification membrane 135 has high efficiency in treating liquids with low concentrations of positive metal ions. The second flow channel 132 has a lower concentration of positive metal ions, so treatment using the purification membrane 135 results in less pollution.

[0043] It should be noted that while treating wastewater directly through chemical precipitation is highly efficient, it requires a large amount of chemicals, resulting in high costs and significant pollution. Conversely, treating wastewater directly through a purification membrane 135, while less polluting, is less efficient, takes longer, and produces poorer results when treating liquids with high concentrations of positive metal ions.

[0044] This invention achieves comprehensive wastewater treatment by first filtering the wastewater, then separating it into liquids with different concentrations of positive metal ions, and finally treating each liquid with different concentrations of positive metal ions using chemicals and a purification membrane 135. This not only improves wastewater treatment efficiency and reduces wastewater treatment costs, but also reduces pollution emissions.

[0045] In addition, the use of the purification membrane 135 in the treatment of low-concentration heavy metal wastewater significantly reduces the treatment load of the purification membrane 135, thereby effectively extending the service life of the purification membrane 135, further improving treatment efficiency and reducing costs.

[0046] According to an embodiment of the present invention, a treatment device 10 for treating wastewater containing heavy metals comprises an inlet zone 11, a separation zone 12, and a purification zone 13 arranged sequentially and connected along the water flow direction in a tank 1. A screen 21 is disposed in the inlet zone 11; a bent isolation wall 3 is disposed in the purification zone 13 to divide the purification zone 13 into a first flow channel 131 and a second flow channel 132; a balancing plate 41 and a parallel magnetic plate 42 are disposed in the separation zone 12 to adsorb and separate at least some positively charged metal ions and metal oxides in the wastewater to the first flow channel 131, so that the concentration of positive metal ions in the first flow channel 131 is greater than that in the second flow channel 132. The wastewater in the first flow channel 131 is purified by adding chemicals, and the wastewater in the second flow channel 132 is treated by a purification membrane 135, thereby achieving comprehensive treatment of wastewater, which improves the wastewater treatment efficiency, reduces the cost of wastewater treatment, and reduces pollution discharge.

[0047] In some embodiments of this utility model, such as Figure 1 As shown, the water inlet zone 11 has a water inlet overflow port 111 on the side away from the separation zone 12. The screen 21 is located at one end of the water inlet zone 11 away from the separation zone 12 and on the side of the water inlet overflow port 111 facing the water inlet zone 11. The treatment device 10 also includes a screen support 22, which is located in the water inlet zone 11 and is used to fix the screen 21.

[0048] Understandably, the screen 21 is located at one end of the inlet zone 11 away from the separation zone 12, and on the side of the inlet overflow 111 facing the inlet zone 11, thus facilitating timely filtration of wastewater from the inlet overflow 111 and reducing the entry of particulate impurities into the inlet zone 11. One end of the screen support 22 is connected to the tank body 1, and the other end is connected to the screen 21, thereby fixing the screen 21 and preventing it from being washed away by the water flow.

[0049] Furthermore, such as Figure 1 As shown, there are multiple screen supports 22, which improves the reliability of fixing the screen 21. For example, in this utility model, there are two screen supports 22, respectively located at the upper and lower ends of the screen 21, thereby fixing the upper and lower ends of the screen 21. However, this utility model is not limited to this; there can be more screen supports 22, such as 3, 4, 5, or 6, and the screen supports 22 can be located at other positions on the screen 21, such as the perimeter.

[0050] In some embodiments of this utility model, such as Figure 1As shown, there are two equal potential plates 41 and two parallel magnetic plates 42. The two equal potential plates 41 are respectively located at the upper and lower ends of the separation zone 12, and the two parallel magnetic plates 42 are respectively located at the upper and lower ends of the separation zone 12. It can be understood that the arrangement of the two equal potential plates 41 and the two parallel magnetic plates 42 further improves the adsorption efficiency of positive metal ions and metal compounds in wastewater, thereby improving the treatment effect of wastewater.

[0051] Furthermore, such as Figure 1 As shown, the treatment device 10 also includes a scraper cleaning system 5, which is located at one of the upper and lower ends of the separation zone 12. It is understood that the scraper cleaning system 5 removes metal compounds adsorbed on the parallel magnetic plate 42 and the equalizing potential plate 41, thereby preventing these metal compounds from affecting their adsorption capacity. This further ensures the adsorption efficiency of positive metal ions and metal compounds in the wastewater, thus improving the wastewater treatment effect.

[0052] In some embodiments of this utility model, such as Figure 1 As shown, the two equalizing plates 41 are the positive electrode plate 411 and the negative electrode plate 412, respectively, and the two parallel magnetic plates 42 are the S pole magnetic plate 421 and the N pole magnetic plate 422, respectively. The negative electrode plate 412, the S pole magnetic plate 421, the scraper cleaning system 5 and the first flow channel 131 are located at the same end of the upper and lower ends.

[0053] It is understandable that positive metal ions and metal compounds can be attracted by the negative electrode plate 412 and the S-polar magnetic plate 421, and repelled by the positive electrode plate 411 and the N-polar magnetic plate 422. The negative electrode plate 412, the S-polar magnetic plate 421 and the first flow channel 131 are located at the same end of the upper and lower ends, while the positive electrode plate 411 and the N-polar magnetic plate 422 are located at the other end of the upper and lower ends. This allows positive metal ions and metal compounds to be better attracted to the location of the first flow channel 131, thereby further improving the adsorption efficiency of positive metal ions and metal compounds in wastewater, and thus improving the treatment effect of wastewater.

[0054] The negative electrode plate 412, the S-polar magnetic plate 421, and the scraper cleaning system 5 are located at the same end of the upper and lower ends, so that the scraper cleaning system 5 can scrape off the metal compounds adsorbed on the negative electrode plate 412 and the S-polar magnetic plate 421.

[0055] In some embodiments of this utility model, such as Figure 1 As shown, the scraper cleaning system 5 includes: a scraper bracket 51 and a scraper 52. The scraper bracket 51 is mounted on the pool body 1 and has a slide rail (not shown) extending along the water flow direction. The scraper 52 is movably mounted on the slide rail along the length of the slide rail.

[0056] It is understandable that the scraper support 51 extends along the water flow direction, and the length of the scraper support 51 is greater than the length of the equalizing plate 41 and the parallel magnetic plate 42 along the water flow direction. As a result, the scraping range of the scraper 52 can cover the equalizing plate 41 and the parallel magnetic plate 42, thereby better scraping off the metal compounds on the equalizing plate 41 and the parallel magnetic plate 42.

[0057] In some embodiments of this utility model, such as Figure 1 As shown, the parallel magnetic plate 42 is fixed to the pool body 1, and the equalizing plate 41 is fixed to the parallel magnetic plate 42. This allows the parallel magnetic plate 42 and the equalizing plate 41 to form a single unit, thereby enabling them to better adsorb positive metal ions and metal compounds.

[0058] In some embodiments of this utility model, such as Figure 1 As shown, the first flow channel 131 has a first turbulence plate 133 and a second turbulence plate 134, with the size of the first turbulence plate 133 being larger than the size of the second turbulence plate 134. It can be understood that the arrangement of the first turbulence plate 133 and the second turbulence plate 134 allows the liquid in the first flow channel 131 to better enter a turbulent state, thereby improving the mixing uniformity between the chemical agent and the wastewater in the first flow channel 131. This allows the positive metal ions in the wastewater in the first flow channel 131 to fully react with the chemical agent, forming precipitates and improving the wastewater treatment effect.

[0059] It should be noted that the first turbulence plate 133 is relatively large. The first turbulence plate 133 can improve the dispersion of substances in the water, increase the contact area, and facilitate chemical reactions. Furthermore, through large-scale turbulence, it promotes mass and heat transfer within the fluid, while also aiding in the suspension of suspended solids and preventing sedimentation.

[0060] The second turbulence plate 134 is smaller in size, and its placement creates a highly efficient mixing effect within a smaller space, increasing the reaction rate. It also enhances the shear force in the fluid, helping to break up air bubbles or suspended particles in the liquid and improving dissolution efficiency. Furthermore, the small turbulence plate can promote flocculation, helping suspended particles aggregate into larger flocs, facilitating subsequent sedimentation or filtration.

[0061] Furthermore, such as Figure 1As shown, there are multiple first turbulence plates 133 and second turbulence plates 134. This further allows the liquid in the first flow channel 131 to enter the turbulent state better, thereby improving the mixing uniformity between the chemical agent and the sewage in the first flow channel 131. This allows the positive metal ions in the sewage in the first flow channel 131 to fully react with the chemical agent to form precipitates, thus improving the sewage treatment effect.

[0062] In some embodiments of this utility model, such as Figure 1 As shown, the treatment device 10 for treating wastewater containing heavy metals further includes a dosing device 61 and a dosing pipe 62. The dosing device 61 and the dosing pipe 62 are installed on the tank body 1, and the dosing device 61 is connected to the first flow channel 131 through the dosing pipe 62. The dosing device 61 contains chemical agents to precipitate positive metal ions in the wastewater within the first flow channel 131, thereby achieving chemical treatment of the wastewater within the first flow channel 131.

[0063] In some embodiments of this utility model, such as Figure 1 As shown, the purification membrane 135 is disposed within the second flow channel 132, and the purification membrane 135 includes an ultrafiltration membrane 1351 and a reverse osmosis membrane 1352. It is understood that the ultrafiltration membrane 1351 has a relatively large pore size, typically between 0.01 and 0.1 micrometers, and can effectively remove suspended solids, colloids, bacteria, and large organic molecules from the water. The reverse osmosis membrane 1352, on the other hand, has a very small pore size, typically around 0.0001 micrometers (i.e., 1 nanometer), and can remove almost all dissolved substances from the water, including ions, small organic molecules, and most bacteria.

[0064] Thus, through the interaction of the ultrafiltration membrane 1351 and the reverse osmosis membrane 1352, dual filtration of wastewater is achieved, thereby improving the wastewater treatment effect.

[0065] In some embodiments of this utility model, such as Figure 1 As shown, the ultrafiltration membrane 1351 is located upstream of the reverse osmosis membrane 1352 along the water flow direction. It is understood that the ultrafiltration membrane 1351 has a relatively large pore size, typically between 0.01 and 0.1 micrometers, effectively removing suspended solids, colloids, bacteria, and large organic molecules from the water. In contrast, the reverse osmosis membrane 1352 has a very small pore size, typically around 0.0001 micrometers (i.e., 1 nanometer), capable of removing almost all dissolved substances from the water, including ions, small organic molecules, and most bacteria.

[0066] Wastewater is first treated through an ultrafiltration membrane 1351, and then through a reverse osmosis membrane 1352. This significantly reduces the processing capacity of the reverse osmosis membrane 1352 while ensuring the wastewater treatment effect, thereby effectively extending the service life of the reverse osmosis membrane 1352, further improving treatment efficiency and reducing costs.

[0067] In some embodiments of this utility model, such as Figure 1 As shown, the treatment device 10 for treating wastewater containing heavy metals further includes: an outlet pipe 71 and an outlet overflow plate 72. The outlet pipe 71 is located at the end of the pool body 1 along the water flow direction and is connected to the first flow channel 131; the outlet overflow plate 72 is located at the end of the pool body 1 along the water flow direction and is connected to the second flow channel 132.

[0068] Understandably, the outlet pipe 71 facilitates the discharge and subsequent treatment of the liquid treated in the first flow channel 131, and the outlet overflow plate 72 facilitates the discharge and subsequent treatment of the liquid treated in the second flow channel 132. The outlet pipe 71 and the outlet overflow plate 72 are spaced apart, allowing the treated liquids in the first flow channel 131 and the second flow channel 132 to be discharged simultaneously and separately, preventing mixing of the treated liquids in the first flow channel 131 and the second flow channel 132, and facilitating subsequent separate treatment of the treated liquids in the first flow channel 131 and the second flow channel 132.

[0069] In some embodiments of this utility model, such as Figure 1 As shown, along the water flow direction, the bending angle of the bent isolation wall 3 gradually increases, and the cross-section of the first flow channel 131 gradually decreases. It should be noted that, along the water flow direction, the bent isolation wall 3 bends and tilts towards the first flow channel 131 in a direction away from the second flow channel 132, for example, in… Figure 1 In the example shown, the first flow channel 131 and the second flow channel 132 are arranged in the vertical direction, with the first flow channel 131 located above the second flow channel 132. The bent isolation wall 3 extends along the water flow direction. At this time, along the water flow direction, the bent isolation wall 3 bends upward and extends at an angle.

[0070] Understandably, along the direction of water flow, the bending angle of the bent isolation wall 3 gradually increases, thereby gradually reducing the cross-section of the first flow channel 131. This results in a gradual increase in the liquid flow velocity within the first flow channel 131, allowing the liquid within the first flow channel 131 to be in a better turbulent state. This improves the mixing uniformity between the chemical agents and the wastewater within the first flow channel 131, enabling the positive metal ions in the wastewater within the first flow channel 131 to fully react with the chemical agents, forming precipitates and improving the wastewater treatment effect.

[0071] In addition, the liquid flow rate in the first flow channel 131 gradually increases, which can reduce the accumulation of precipitates in the first flow channel 131 and allow the liquid in the first flow channel 131 to better carry away the precipitates produced by the reaction of chemical reagents and positive metal ions.

[0072] In some embodiments of this utility model, such as Figure 1As shown, the surfaces of the equalizing electrode plate 41 and the parallel magnetic plate 42 are coated with an anti-corrosion coating. This reduces the corrosion of the equalizing electrode plate 41 and the parallel magnetic plate 42 by corrosive substances in the wastewater, thereby improving their service life, ensuring the adsorption effect on positively charged metal ions and metal oxides, and guaranteeing the effectiveness of wastewater treatment.

[0073] In some embodiments of this utility model, such as ​ As shown, the treatment device 10 for treating wastewater containing heavy metals also includes a ladder 8, which is installed on the tank body 1. It is understood that the ladder 8 is installed to facilitate personnel climbing onto the tank body 1 to perform maintenance work on the tank body 1.

[0074] The wastewater treatment system according to an embodiment of the present invention includes the above-described treatment device 10 for treating wastewater containing heavy metals.

[0075] According to the wastewater treatment system of this utility model embodiment, by setting up the above-mentioned treatment device 10 for treating wastewater containing heavy metals, the tank body 1 has an inlet zone 11, a separation zone 12 and a purification zone 13 arranged and connected in sequence along the water flow direction. A screen 21 is provided in the inlet zone 11; a bent isolation wall 3 is provided in the purification zone 13 to divide the purification zone 13 into a first flow channel 131 and a second flow channel 132; a balancing plate 41 and a parallel magnetic plate 42 are provided in the separation zone 12 to adsorb and separate at least some positively charged metal ions and metal oxides in the wastewater to the first flow channel 131, so that the concentration of positive metal ions in the first flow channel 131 is greater than the concentration of positive metal ions in the second flow channel 132. The wastewater in the first flow channel 131 is purified by adding chemicals, and the wastewater in the second flow channel 132 is treated by a purification membrane 135, thereby realizing comprehensive treatment of wastewater, which not only improves the wastewater treatment efficiency and reduces the cost of wastewater treatment, but also reduces pollution discharge.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A treatment device for treating wastewater containing heavy metals, characterized in that, include: The pool body has an inlet zone, a separation zone, and a purification zone arranged and connected sequentially along the water flow direction. A screen, wherein the screen is disposed in the water inlet area; A bent partition wall is provided in the clean area to divide the clean area into a first flow channel and a second flow channel; A balancing plate and a parallel magnetic plate are disposed in the separation zone to adsorb and separate at least some positively charged metal ions and metal oxides in the wastewater into the first flow channel, so that the concentration of positive metal ions in the first flow channel is greater than that in the second flow channel. The wastewater in the first flow channel is purified by adding chemicals, and the wastewater in the second flow channel is treated by a purification membrane.

2. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, The water inlet zone has an overflow outlet on the side opposite to the separation zone. The screen is located at the end of the water inlet zone opposite to the separation zone and on the side of the overflow outlet facing the water inlet zone. The treatment device further includes: A screen support is provided in the water inlet area to fix the screen.

3. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, There are two equalizing plates and two parallel magnetic plates, with the two equalizing plates respectively disposed at the upper and lower ends of the separation zone, and the two parallel magnetic plates respectively disposed at the upper and lower ends of the separation zone. The processing device further includes: A scraper cleaning system is located at one of the upper and lower ends of the separation zone.

4. The treatment apparatus for treating wastewater containing heavy metals according to claim 3, characterized in that, The two equalizing plates are a positive plate and a negative plate, respectively, and the two parallel magnetic plates are an S-pole magnetic plate and an N-pole magnetic plate, respectively. The negative plate, the S-pole magnetic plate, the scraper cleaning system, and the first flow channel are located at the same end of the upper and lower ends.

5. The treatment apparatus for treating wastewater containing heavy metals according to claim 3, characterized in that, The scraper cleaning system includes: A scraper support is provided on the pool body, and the scraper support has a slide rail extending along the water flow direction; A scraper, which is movably disposed on the slide rail along the length of the slide rail.

6. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, The parallel magnetic plate is fixed to the pool body, and the equalizing plate is fixed to the parallel magnetic plate.

7. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, The first flow channel has a first turbulence plate and a second turbulence plate, and the size of the first turbulence plate is larger than the size of the second turbulence plate; And / or, it also includes: a dosing device and a dosing pipe, the dosing device and the dosing pipe being disposed on the tank body, the dosing device being connected to the first flow channel through the dosing pipe.

8. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, The purification membrane is disposed in the second flow channel, and the purification membrane includes an ultrafiltration membrane and a reverse osmosis membrane.

9. The treatment apparatus for treating wastewater containing heavy metals according to claim 8, characterized in that, The ultrafiltration membrane is located upstream of the reverse osmosis membrane along the direction of water flow.

10. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, Also includes: A water outlet pipe is located at the end of the pool body along the water flow direction and is connected to the first flow channel; An overflow plate is provided at the end of the pool body along the water flow direction and is connected to the second flow channel.

11. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, Along the direction of water flow, the bending angle of the bent isolation wall gradually increases, and the cross-section of the first flow channel gradually decreases.

12. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, The surfaces of the equalizing electrode and the parallel magnetic plate have an anti-corrosion coating layer.

13. The treatment apparatus for treating wastewater containing heavy metals according to claim 1, characterized in that, Also includes: A ladder, which is located on the pool body.

14. A wastewater treatment system, characterized in that, It includes a treatment apparatus for treating wastewater containing heavy metals according to any one of claims 1-13.

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