Device and method for removing heavy metals in industrial wastewater

Abstract

The invention relates to a device and a method for removing heavy metals in industrial wastewater, and relates to the technical field of wastewater treatment.The two partition plates are used for vertically layering standing wastewater in an electrolysis tank, then two screens in a filtering mechanism are used for filtering upper-layer water and lower-layer water respectively, and due to the fact that sediment in the upper-layer water is few, the filtering speed is high, and the filtering effect is good. Even if the lower-layer water precipitates more, the overall content of the lower-layer wastewater is low, and even if most precipitates are adhered to the screen, the time for passing through the screen is very short due to less wastewater, so that the wastewater does not need to be filtered by using one screen, the time for filtering the wastewater is shortened, and the working efficiency is improved; and the two scraping plates can be driven to slide on the upper surfaces of the respective screens, the sediments on the upper surfaces of the screens are pushed to move, the sediments on the upper surfaces of the screens are pushed into the collecting box from the rectangular opening, cleaning of the sediments on the upper surfaces of the screens is achieved, manual cleaning of workers is not needed, and the labor amount of the workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a device and method for removing heavy metals from industrial wastewater. Background Art

[0002] With the rapid development of industry, water pollution is becoming increasingly serious and has become an unavoidable issue in today's society. As the types of pollutants in wastewater become more and more complex, the country's control over wastewater discharge has become more stringent. Generally, industrial wastewater contains a large amount of heavy metals, which will pollute the environment if discharged directly. Therefore, professional treatment equipment is needed to treat the heavy metals in industrial wastewater.

[0003] The patent with the publication number CN107188346A discloses an environmentally friendly separation and purification device for heavy metal ions in industrial wastewater, including an electrolytic box, a support plate fixedly connected to the upper right end of the electrolytic box, an electrolytic anode sleeved on the support plate, a support seat fixedly connected to the upper left end of the electrolytic box, an electrolytic cathode sleeved on the support seat, a valve installed by a thread at the lower left end of the electrolytic box, a filter device installed by a screw at the left end of the electrolytic box, and a pipe installed by a screw at the lower end of the filter device. This environmentally friendly separation and purification device for heavy metal ions in industrial wastewater electrolytic filtration adopts an electrolytic anode, and the magnesium hydroxide produced in the electrolytic box can effectively adsorb heavy metal ions in water, and form floccules and precipitate, so as to separate heavy metal ions from water; the filter device can effectively filter the precipitate produced in the electrolytic box, remove heavy metals, and purify water quality.

[0004] However, the above prior art has the following technical defects: 1. Generally, industrial wastewater contains a large amount of heavy metals, and a large amount of precipitation is generated in the subsequent electrolytic cell. During the process of filtering the wastewater using a screen, some of the precipitation may adhere to the screen, thereby affecting the subsequent wastewater passing through the screen and affecting the filtration speed of the screen. In addition, all the wastewater in the electrolytic cell relies on this screen for filtration, which leads to a long filtration time and reduces the working efficiency of the device.

[0005] 2. The cloth bag is fixed to the lower end of the screen by a clamp, but the screen and the cloth bag are stored inside the pipe. When cleaning the sediment in the cloth bag, it is necessary to first open the pipe, remove the clamp, and then remove the cloth bag from the screen. After the sediment is cleaned, it needs to be reinstalled on the lower end of the screen and then the pipe is closed again. Therefore, cleaning the sediment in the cloth bag is very troublesome and relies entirely on manual cleaning by the staff, which increases the workload of the staff.

[0006] Therefore, based on the existing foundation, there is still room for improvement in order to overcome the above-mentioned technical defects. Summary of the invention

[0007] In order to solve the above problems, on the first aspect, the present application provides a device for removing heavy metals in industrial wastewater, which adopts the following technical scheme: it includes a box structure and a filtering mechanism arranged directly below it, the box structure includes an electrolytic box with an opening at the upper end and an observation window at the side, the interior of the electrolytic box is correspondingly provided with two partitions that divide the interior of the electrolytic box into upper and lower chambers, one side of each partition extends to the outside of the electrolytic box and is installed with a strip plate, a square tube is installed on the lower surface of the electrolytic box, two baffles for sealing the square tube are correspondingly arranged inside the square tube, and a conveying pipe is installed on the inner wall of the electrolytic box above the partition.

[0008] The filtering mechanism includes a filtering box located directly below the electrolytic box and with its upper plane bent downward. Rectangular openings are provided on both sides of the filtering box. A rectangular plate is installed at the center of the inner top surface of the filtering box. An inclined screen fixedly connected to the rectangular plate is installed at each rectangular opening port on the inner wall of the filtering box.

[0009] Preferably, the lower end of the square tube is connected to the filter box and the connection position is on one side of the rectangular plate, the lower end of the delivery pipe is connected to the filter box and the connection position is on the other side of the rectangular plate, and a second valve is installed on the delivery pipe near the electrolytic box.

[0010] Preferably, a driving mechanism is arranged at the rear side of the box body mechanism, and the driving mechanism comprises a mounting plate installed at the rear side of the electrolytic box, a C-shaped plate is installed on the side of the mounting plate, and a motor is installed at the center of the side of the C-shaped plate.

[0011] Preferably, the driving end of the motor passes through the L-shaped plate and is installed with a first gear. Two first racks distributed up and down and meshing with the first gear are correspondingly arranged on the side of the mounting plate. A first magnet is installed at one end of each first rack, and an L-shaped plate fixedly connected to the strip plate on the same side is installed on the side of each first magnet.

[0012] Preferably, an adjustment mechanism is provided on the rear side of the box body mechanism below the driving mechanism, and the adjustment mechanism includes two groups of mounting seats distributed up and down and installed on the rear side of the electrolytic box, a round rod is installed between each group of two mounting seats, and two L-shaped frames are slidably arranged on the two round rods, and one side of each baffle extends to the outside of the square tube and is fixedly connected to the L-shaped frame on the same side.

[0013] Preferably, a middle cylinder is fixedly installed on each round rod between the two L-shaped frames, a second gear is rotatably installed on the rear side of the electrolytic box near the upper end of the L-shaped frame, and a second rack meshing with the second gear is installed on the side of each L-shaped frame, and the two second racks are distributed up and down.

[0014] Preferably, a cleaning mechanism is commonly provided on the box mechanism and the filtering mechanism, and the cleaning mechanism comprises two groups of vertical plates, and the two groups of vertical plates are respectively located on one side of the two strip plates, and a strip groove is provided on the side of each vertical plate, and a cylindrical movable block is provided in each strip groove, and a limiting plate is installed at the other end of each movable block.

[0015] Preferably, a side plate is installed at the lower end of each group of two vertical plates, a group of connecting rods extending into the filter box are installed on the side of each side plate, and a scraper located above the screen is installed at the end of each group of two connecting rods extending into the filter box.

[0016] Preferably, an electrolysis mechanism is also provided on the box body mechanism, and the electrolysis mechanism includes a U-shaped frame installed on the upper port of the electrolysis box, an electric push rod is installed at the upper center of the U-shaped frame, a fixed plate is installed at the lower end of the electric push rod, two cylinders are provided on the fixed plate, and graphite rods and magnesium rods are respectively provided in the two cylinders.

[0017] On the other hand, the present application also discloses a method for removing heavy metals from industrial wastewater, the method comprising the following steps: S1. Wastewater electrolysis: after the wastewater is placed in an electrolysis box, the wastewater is electrolyzed by an electrolysis mechanism to generate floccules and precipitate.

[0018] S2. Wastewater stratification: let the wastewater in the electrolytic box stand and then use two partitions to stratify the wastewater. The upper wastewater contains a small amount of sediment, and the lower wastewater contains a large amount of sediment.

[0019] S3, wastewater filtration, the wastewater from the upper and lower layers are introduced into the filtering mechanism respectively, and the upper and lower layers of wastewater are filtered respectively using two screens.

[0020] S4, sediment cleaning, during the process of the partition position restoration, the two scrapers in the cleaning mechanism are driven to move, and the sediment on the upper surfaces of the two screens is scraped into the collection box.

[0021] In summary, the present application includes at least one of the following beneficial technical effects of a device and method for removing heavy metals from industrial wastewater: 1. After the electrolysis of wastewater is completed, the present invention uses two partitions to separate the static wastewater in the electrolytic box into upper and lower layers, and then uses two screens in the filtering mechanism to filter the upper and lower layers of water respectively. Since there is less precipitation in the upper layer of water, the filtration speed is fast. Even if there is more precipitation in the lower layer of water, the overall content of the wastewater in the lower layer is low. Even if most of the precipitation adheres to the screen, due to the small amount of wastewater, the time to pass through the screen is also very short. Therefore, there is no need to use a screen to filter the wastewater, which reduces the time spent on filtering wastewater and improves work efficiency.

[0022] 2. The present invention uses a cleaning mechanism to drive two scrapers to slide on the upper surfaces of their respective screens during the process of two partitions in the box mechanism moving away from each other, thereby pushing the sediment on the upper surfaces of the screens to move; when the position of the partitions is restored, the scrapers just move to the rectangular opening ports on the same side, thereby pushing the sediment on the upper surfaces of the screens into the collection box through the rectangular opening, thereby cleaning the sediment on the upper surfaces of the screens, eliminating the need for manual cleaning by staff, and reducing the workload of staff.

[0023] 3. After the driving mechanism of the device drives the partitions to approach each other, it can cooperate with the adjusting mechanism to adjust the two partitions in the square tube to move away from each other so that the square tube can open automatically. At the same time, when the partitions are not layered, the two scrapers are just at the two rectangular opening ports to close them, thereby preventing external dust from entering the filter box through the rectangular opening when the device is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a sectional view of the box mechanism of the present invention.

[0027] Figure 3 It is a cross-sectional view of the second state of the present invention.

[0028] Figure 4 It is a cross-sectional view of the filtering mechanism of the present invention.

[0029] Figure 5 It is a schematic diagram of the driving mechanism structure of the present invention.

[0030] Figure 6 It is a disassembled diagram of the driving mechanism of the present invention.

[0031] Figure 7 It is a schematic diagram of the second state structure of the present invention.

[0032] Figure 8 It is a schematic diagram of the structure of the regulating mechanism of the present invention.

[0033] Fig. 9 yes Figure 1 Enlarged view of part A.

[0034] Fig.10 It is a side view of the present invention.

[0035] Fig.11 It is a schematic diagram of the cleaning mechanism structure of the present invention.

[0036] Fig.12 It is a cross-sectional view of the present invention.

[0037] Fig.13 It is a schematic diagram of the electrolysis mechanism structure of the present invention.

[0038] Fig.14 It is a partial cross-sectional view of the electrolysis mechanism of the present invention.

[0039] Fig.15 It is a disassembly diagram of the collection mechanism of the present invention.

[0040] In the figure: 1. box mechanism; 101. electrolytic box; 102. partition; 103. square tube; 104. baffle; 105. delivery tube; 106. strip plate; 2. filtering mechanism; 201. filtering box; 202. rectangular opening; 203. rectangular plate; 204. screen; 205. liquid outlet pipe; 206. first valve; 3. driving mechanism; 301. mounting plate; 302. L-shaped plate; 303. motor; 304. chute; 305. slide bar; 306. first rack; 307. first magnet; 308. L-shaped plate; 309. slide bar; 310. first gear; 4. adjusting mechanism; 401. mounting seat; 402. round rod; 403. L-shaped frame; 404. middle cylinder; 405, second gear; 406, second rack; 5, cleaning mechanism; 501, scraper; 502, connecting rod; 503, side plate; 504, vertical plate; 505, strip groove; 506, movable block; 507, limit plate; 6, collecting mechanism; 601, support plate; 602, mounting groove; 603, T-shaped piece; 604, collecting box; 605, round magnet; 7, electrolysis mechanism; 701, L-shaped frame; 702, electric push rod; 703, fixing plate; 704, cylinder; 705, graphite rod; 706, magnesium rod; 707, wire; 708, threaded cylinder; 709, screw; 8, supporting leg; 9, horizontal plate; 10, second valve; 11, L-shaped frame; 12, second magnet. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1 - Fig.15 Embodiments of the present invention are described in detail.

[0042] The embodiment of the present application discloses a device and method for removing heavy metals from industrial wastewater. The stationary wastewater in the electrolytic box is divided into upper and lower layers using two partitions, and then the upper and lower layers of water are filtered separately using two screens in the filtering mechanism. Since there is less precipitation in the upper layer of water, the filtration speed is fast. Even if there is more precipitation in the lower layer of water, the overall content of the wastewater in the lower layer is low. Even if most of the precipitation adheres to the screen, due to the small amount of wastewater, the time it takes to pass through the screen is also very short. Therefore, there is no need to use a screen to filter the wastewater, which reduces the time spent on filtering the wastewater and improves work efficiency.

[0043] Embodiment 1: Figure 1 and Figure 2 As shown, it includes a box body mechanism 1 and a filtering mechanism 2 arranged directly below it. The box body mechanism 1 includes an electrolytic box 101 with an opening at the upper end and an observation window on the side. The box body mechanism 1 is used to provide a place for wastewater electrolysis, the filtering mechanism 2 is used to filter the wastewater after electrolysis, and the observation window is used to observe the precipitation distribution inside the electrolytic box 101.

[0044] like Figure 2 As shown, the interior of the electrolytic box 101 is provided with two partitions 102 that divide the interior of the electrolytic box 101 into an upper and lower chamber. One side of each partition 102 extends to the outside of the electrolytic box 101 and is installed with a strip plate 106. The electrolytic box 101 is used to provide a place for wastewater treatment. The two strip plates 106 close to each other can drive the two partitions 102 to approach each other until they touch, thereby dividing the wastewater in the electrolytic box 101 into an upper and lower layer.

[0045] like Figure 1 and Figure 2 As shown, a square tube 103 is installed on the lower surface of the electrolytic box 101, and two baffles 104 for sealing the square tube 103 are correspondingly arranged inside the square tube 103. A delivery pipe 105 is installed on the inner wall of the electrolytic box 101 above the partition 102, and a second valve 10 is installed on the delivery pipe 105 near the electrolytic box 101. Opening the second valve 10 can allow the wastewater on the upper layer of the partition 102 to be discharged into the filter mechanism 2 through the delivery pipe 105, and the wastewater on the lower layer of the partition 102 can be discharged into the filter mechanism 2 through the square tube 103.

[0046] like Figure 3 As shown above, in summary, wastewater is electrolyzed in the electrolytic box 101 to form precipitation, and after standing, the precipitation is allowed to gather at the bottom of the electrolytic box 101, and then the two strip plates 106 close to each other can drive the two partitions 102 to approach each other until they are in contact, and the wastewater in the electrolytic box 101 is divided into two layers, the upper layer of the partition 102 is discharged into the filter mechanism 2 through the delivery pipe 105, and the lower layer of the partition 102 is discharged into the filter mechanism 2 through the square tube 103.

[0047] like Figure 4 As shown, the filtering mechanism 2 includes a filtering box 201 located directly below the electrolytic box 101 and with its upper plane bent downward, rectangular openings 202 are provided on both sides of the filtering box 201, and a rectangular plate 203 is installed at the center of the inner top surface of the filtering box 201, the rectangular plate 203 is used to block precipitation, and the two rectangular openings 202 are used for subsequent cleaning of the precipitation inside the filtering box 201.

[0048] like Figure 4As shown, the inner wall of the filter box 201 is installed with an inclined screen 204 fixedly connected to the rectangular plate 203 at each rectangular opening 202 port, the lower end of the square tube 103 is connected to the filter box 201 and the connection position is on one side of the rectangular plate 203, the lower end of the delivery pipe 105 is connected to the filter box 201 and the connection position is on the other side of the rectangular plate 203, the lower layer of wastewater discharged from the square tube 103 is filtered by the screen 204 on the same side thereof, and the upper layer of wastewater discharged from the delivery pipe 105 is filtered by the screen 204 on the same side thereof.

[0049] like Figure 4 As shown, a liquid outlet pipe 205 is installed on the side of the filter box 201 near the bottom, and a first valve 206 is installed on the liquid outlet pipe 205. When the first valve 206 is opened, the filtered waste water is discharged from the liquid outlet pipe 205.

[0050] like Figure 3 and Figure 4 As shown, in summary, the lower layer of wastewater discharged from the square tube 103 is filtered by the screen 204 on the same side, and the upper layer of wastewater discharged from the delivery pipe 105 is filtered by the screen 204 on the same side thereof, and the first valve 206 is opened, and the filtered wastewater is discharged from the liquid outlet pipe 205.

[0051] like Figure 1 and Figure 5 As shown, a driving mechanism 3 is arranged on the rear side of the box body mechanism 1, and the driving mechanism 3 includes a mounting plate 301 mounted on the rear side of the electrolytic box 101, and a C-shaped plate 302 is mounted on the side of the mounting plate 301. The driving mechanism 3 is used to drive the partition 102 to move, and the mounting plate 301 and the C-shaped plate 302 are used to provide installation space for other components in the mechanism.

[0052] like Figure 5-Figure 6 As shown, a motor 303 is installed at the center of the side of the C-shaped plate 302, the driving end of the motor 303 passes through the C-shaped plate 302 and is installed with a first gear 310, and two first racks 306 distributed up and down and meshing with the first gear 310 are correspondingly arranged on the side of the mounting plate 301. The running motor 303 drives the first gear 310 to rotate, and the rotating first gear 310 can drive the two first racks 306 meshing with it to move.

[0053] like Figure 5-Figure 6 As shown, a first magnet 307 is installed at one end of each first rack 306, and each first rack 306 is made of iron. An L-shaped plate 308 fixedly connected to the strip plate 106 on the same side is installed on the side of each first magnet 307. The first magnet 307 is connected to the second rack 406 through magnetic force. Each moving first rack 306 can drive the L-shaped plate 308 to move through the first magnet 307, and then the moving L-shaped plate 308 drives the strip plate 106 to move.

[0054] like Figure 5-Figure 6 As shown, in summary, the running motor 303 drives the first gear 310 to rotate, and the rotating first gear 310 can drive the two first racks 306 meshing therewith to move, and each moving first rack 306 can drive the L-shaped plate 308 to move through the first magnet 307, and then the moving L-shaped plate 308 drives the strip plate 106 to move, so that the two strip plates 106 are close to each other, and then drive the two partitions 102 to be close to each other. When the two partitions 102 are in contact, the two first racks 306 that continue to move will be disconnected from the first magnet 307, and when the two first racks 306 move in the opposite direction, each first magnet 307 will be re-adsorbed on the corresponding end of the first rack 306.

[0055] like Figure 7 As shown, an adjusting mechanism 4 is provided on the rear side of the box mechanism 1 below the driving mechanism 3 , and the adjusting mechanism 4 is used to open or close the square tube 103 during the operation of the driving mechanism 3 .

[0056] like Figure 7-Figure 8 As shown, the adjustment mechanism 4 includes two groups of mounting seats 401 distributed up and down and installed on the rear side of the electrolytic box 101, and a round rod 402 is installed between each group of two mounting seats 401. Two L-shaped frames 403 are slidably arranged on the two round rods 402. The two L-shaped frames 403 can slide on the two round rods 402, and each mounting seat 401 can limit the L-shaped frame 403.

[0057] like Figure 8 As shown, one side of each baffle 104 extends to the outside of the square tube 103 and is fixedly connected to the L-shaped frame 403 on the same side. A middle tube 404 is fixedly installed between the two L-shaped frames 403 on each round rod 402. The two L-shaped frames 403 that are away from each other can drive the two square tubes 103 to move away from each other to open the square tubes 103. The two middle tubes 404 can also limit the movement of the L-shaped frames 403.

[0058] like Fig. 9 As shown, an L-shaped frame 11 is installed on the lower side of one of the first racks 306 , and a second magnet 12 is installed on the side of the L-shaped frame 11 on one side of a second rack 406 . The moving first rack 306 can drive the second magnet 12 to move through the L-shaped frame 11 .

[0059] like Figure 7-Figure 9As shown, a second gear 405 is rotatably installed on the rear side of the electrolytic box 101 near the upper end of the L-shaped frame 403, and a second rack 406 meshing with the second gear 405 is installed on the side of each L-shaped frame 403. The second rack 406 is made of iron, and the two second racks 406 are distributed up and down. The moving second magnet 12 will drive the second rack 406 on one side to move after contacting it, and the moving second rack 406 drives the other second rack 406 to move in the opposite direction through the second gear 405, driving the two L-shaped frames 403 away from each other.

[0060] like Figure 7-Figure 9 As shown, in summary, the moving second magnet 12 will drive the second rack 406 on one side to move after contacting it, and the moving second rack 406 will drive the other second rack 406 to move in the opposite direction through the second gear 405, driving the two L-shaped frames 403 away from each other, driving the two baffles 104 away from each other to allow the square tube 103 to open, and when the partition 102 is restored to its position, it will drive the second magnet 12 to move in the opposite direction, and then drive the second rack 406 connected to it to move in the opposite direction through magnetic force, so that the two L-shaped frames 403 are close to each other, and the two baffles 104 are close to each other to block the square tube 103.

[0061] like Fig.10 As shown, a cleaning mechanism 5 is provided on the box mechanism 1 and the filter mechanism 2 , and the cleaning mechanism 5 is used to clean the dust on the upper surface of the two screens 204 .

[0062] like Fig.10 and Fig.11 As shown, the cleaning mechanism 5 includes two groups of vertical plates 504, and the two groups of vertical plates 504 are respectively located on one side of the two strip plates 106. A strip groove 505 is opened on the side of each vertical plate 504, and each strip groove 505 is provided with a cylindrical movable block 506 with one end fixedly connected to the strip plate 106 on the same side. A limiting plate 507 is installed at the other end of each movable block 506. The movable strip plate 106 can drive the vertical plate 504 on the same side to move through the movable block 506 and the limiting plate 507, and each movable block 506 can slide in the strip groove 505.

[0063] like Fig.11 and Fig.12 As shown, a side plate 503 is installed at the lower end of each group of two vertical plates 504, and a group of connecting rods 502 extending into the filter box 201 are installed on the side of each side plate 503. The ends of each group of two connecting rods 502 extending into the filter box 201 are installed with a scraper 501 above the screen 204. Each group of movable vertical plates 504 can drive the scraper 501 to move through the side plates 503 and the connecting rods 502, and the movable scraper 501 can be used to scrape the sediment on the upper surface of the screen 204 out of the rectangular opening 202.

[0064] like Fig.11 and Fig.12 As shown, in summary, when the two partitions 102 are close to each other for stratification, the corresponding strip plates 106 and the limit plates 507 will cooperate to drive the two groups of vertical plates 504 to approach each other until they come into contact with the rectangular plate 203, and then when the partitions 102 move away from each other, they will drive the two scrapers 501 away from each other, and each moving scraper 501 can scrape the sediment on the upper surface of the screen 204 out of the rectangular opening 202.

[0065] like Fig.12 As shown, an electrolysis mechanism 7 is also provided on the box mechanism 1 , and the electrolysis mechanism 7 is used to electrolyze the wastewater in the electrolysis box 101 .

[0066] like Fig.13 As shown, the electrolysis mechanism 7 includes a U-shaped frame 701 installed at the upper end of the electrolysis box 101, an electric push rod 702 is installed at the upper center of the U-shaped frame 701, and a fixed plate 703 is installed at the lower end of the electric push rod 702. The electric push rod 702 can drive the fixed plate 703 to move up and down during the extension and retraction process.

[0067] like Fig.13 As shown, two cylinders 704 are arranged on the fixed plate 703, and graphite rods 705 and magnesium rods 706 are arranged in the two cylinders 704 respectively. Wires 707 are arranged at the upper ends of the graphite rods 705 and the magnesium rods 706. The two wires 707 can be used to connect the graphite rods 705 and the magnesium rods 706 to the positive and negative electrodes of the power supply.

[0068] like Fig.14 As shown, a threaded cylinder 708 is disposed on the side of each cylinder 704 , and a screw 709 is disposed inside each threaded cylinder 708 . The screw 709 can be used to squeeze and fix the graphite rod 705 or the magnesium rod 706 inside the cylinder 704 .

[0069] like Figure 12-13 As shown, in summary, the electric push rod 702 extends to drive the graphite rod 705 and the magnesium rod 706 to extend into the wastewater. Since the graphite rod 705 is connected to the positive electrode of the power supply, a reaction occurs around the graphite rod 705, and the hydrogen ions in the water gain electrons to generate hydrogen, and hydroxide ions remain. The magnesium rod 706 is connected to the negative electrode of the power supply, and the magnesium rod 706 reacts, and magnesium loses electrons to generate magnesium ions. At the same time, the magnesium ions react with the hydroxide ions to generate magnesium hydroxide. Magnesium hydroxide can effectively adsorb heavy metal ions in the water and form flocs and precipitate.

[0070] Embodiment 2: Figure 5 and Figure 6As shown, on the basis of Example 1, a sliding groove 304 is opened on the side of the mounting plate 301 on one side of each second rack 406, and a sliding rod 305 is installed in each sliding groove 304. A sliding rod 305 is slidably arranged on each sliding rod 305 and fixedly connected to the second rack 406 on the same side. Each sliding rod 305 is slidably connected to the inner wall of the sliding groove 304. Each moving first rack 306 drives the slider 309 to slide on the sliding rod 305, thereby enhancing the stability of the first rack 306 when moving.

[0071] like Figure 1 As shown, the lower side of the electrolytic box 101 is rectangular and is equipped with two groups of supporting legs 8 that are vertically downward and in contact with the ground. A horizontal plate 9 fixedly connected to the filter box 201 is installed between each group of two supporting legs 8. The box body mechanism 1 is supported by four supporting legs 8, and the filter mechanism 2 is fixed on the four supporting legs 8 by two horizontal plates 9.

[0072] like Fig.12 and Fig.15 As shown, a collecting mechanism 6 is also provided on the filtering mechanism 2 , and the collecting mechanism 6 is used to collect the sediment pushed out by the filtering mechanism 2 .

[0073] like Fig.12 and Fig.15 As shown, the collecting mechanism 6 includes two support plates 601 installed on both sides of the filter box 201 and below the rectangular opening 202. A group of mounting grooves 602 are correspondingly provided on the upper surface of each support plate 601. A T-shaped piece 603 is slidably provided in each mounting groove 602, and each T-shaped piece 603 can slide in the mounting groove 602.

[0074] A collection box 604 is installed on the upper side of the two T-shaped pieces 603 on each support plate 601, a circular magnet 605 is embedded in the center of the upper side of each support plate 601, and an iron sheet is installed on the lower surface of each collection box 604 just above the circular magnet 605. The collection box 604 can be fixed on the support plate 601 by using the iron sheet and the circular magnet 605.

[0075] like Fig.15 As shown, in summary, the collection box 604 can collect the sediment pushed out by the rectangular opening 202. When the sediment in the collection box 604 needs to be cleaned, the collection box 604 is pulled out to disconnect the upper iron sheet from the circular magnet 605, and at the same time, the two T-shaped pieces 603 on the collection box 604 are allowed to slide out from the mounting groove 602. After the sediment in the collection box 604 is poured out, the two T-shaped pieces 603 at the bottom of the collection box 604 are slid back into the mounting groove 602, and the iron sheet on the collection box 604 is allowed to be re-adsorbed on the circular magnet 605.

[0076] The present application also discloses a method for removing heavy metals from industrial wastewater, the specific steps of the method are as follows: S1, wastewater electrolysis, after putting wastewater into electrolytic box 101, electrolyze wastewater using electrolytic mechanism 7, generate floccules and precipitate, specifically, connect wire 707 on magnesium rod 706 to negative pole of power supply in advance, connect wire 707 on graphite rod 705 to positive pole of power supply, put industrial wastewater into electrolytic box 101, extend electric push rod 702 to drive graphite rod 705 and magnesium rod 706 into wastewater, because graphite rod 705 is connected to positive pole of power supply, reaction occurs around graphite rod 705, hydrogen ions in water gain electrons Hydrogen is generated, and hydroxide ions remain. The magnesium rod 706 is connected to the negative electrode of the power supply, and the magnesium rod 706 reacts. Magnesium loses electrons to generate magnesium ions. At the same time, the magnesium ions react with the hydroxide ions to generate magnesium hydroxide. Magnesium hydroxide can effectively adsorb heavy metal ions in the water and form flocs and precipitate. The height of the magnesium rod 706 and the graphite rod 705 can be adjusted by controlling the extension and retraction of the electric push rod 702 through the wastewater liquid level. When no precipitation is generated, the electric push rod 702 is shortened to drive the graphite rod 705 and the magnesium rod 706 to move out of the wastewater.

[0077] S2, wastewater stratification. After the wastewater in the electrolytic box 101 is allowed to stand, the wastewater is stratified using two partitions 102. The upper layer of wastewater contains a small amount of sediment, and the lower layer of wastewater contains a large amount of sediment. Specifically, after the reaction is completed, the wastewater is allowed to stand for a short period of time to allow the sediment to gather at the bottom of the wastewater. Then the motor 303 is driven to rotate the first gear 310. The rotating first gear 310 drives two first racks 306 meshing with it to move. The two moving first racks 306 drive the two partitions 102 to approach each other through the first magnet 307 and the L-shaped plate 308 until they are in contact. The wastewater is stratified into upper and lower layers. The upper layer of wastewater contains a small amount of sediment, and the lower layer of wastewater contains a large amount of sediment.

[0078] S3, wastewater filtration, the upper and lower layers of wastewater are respectively introduced into the filter mechanism 2, and the upper and lower layers of wastewater are filtered respectively by using two screens 204. Specifically, when the two partitions 102 are in contact, since the limiting L-shaped plate 308 of the strip plate 106 cannot move, the first rack 306 that continues to move is disconnected from the first magnet 307, and the first rack 306 that continues to move drives the second magnet 12 to be magnetically connected with the adjacent second rack 406, and then the moving first rack 306 drives the second rack 406 to move through the second magnet 12, and the moving second rack 406 drives the L-shaped frame 403 connected thereto to move, and the moving second rack 406 also The second gear 405 will drive another second rack 406 to move in the opposite direction, so that the two L-shaped frames 403 move away from each other, and the two baffles 104 move away from each other to open the square tube 103, and the lower layer of wastewater with sediment enters the filter box 201 from the square tube 103, and is filtered by the screen 204 directly below. At the same time, the second valve 10 is opened to allow the upper layer of wastewater to enter the filter box 201 through the delivery pipe 105 and be filtered by another screen 204. Since each screen 204 is inclined, the sediment above the screen 204 slides downward and is collected. The first valve 206 is opened to allow the filtered wastewater to be discharged from the liquid outlet pipe 205.

[0079] S4, sediment cleaning. During the process of restoring the position of the partition 102, the two scrapers 501 in the cleaning mechanism 5 are driven to move, and the sediment on the upper surfaces of the two screens 204 is scraped into the collecting box 604. Specifically, the motor 303 drives the first gear 310 to reverse, drives the two first racks 306 to move in the opposite direction, and then drives the two partitions 102 to move away from each other. Each moving partition 102 pushes a group of vertical plates 504 on the same side to move through the strip plate 106. The moving vertical plates 504 drive the scrapers 501 to move on the upper surface of the screen 204 through the side plates 503 and the connecting rods 502, and push the sediment on the upper surface of the screen 204 to move. When the position of the partition 102 is restored, the scrapers 501 just move to the port of the rectangular opening 202 on the same side, and then push the sediment on the upper surface of the screen 204 from the rectangular opening 202 into the collecting box 604, so as to clean the sediment on the upper surface of the screen 204.

[0080] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0081] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for removing heavy metals from industrial wastewater, comprising a housing (1) and a filtering mechanism (2) arranged directly below the housing, characterized in that: The box structure (1) comprises an electrolytic box (101) with an opening at the upper end and an observation window arranged on the side, two partitions (102) are arranged inside the electrolytic box (101) to divide the inside of the electrolytic box (101) into an upper and lower chamber, one side of each partition (102) extends to the outside of the electrolytic box (101) and is installed with a strip plate (106), a square tube (103) is installed on the lower surface of the electrolytic box (101), two baffles (104) are arranged inside the square tube (103) to seal it, and a conveying pipe (105) is installed on the inner wall of the electrolytic box (101) above the partition (102); The filtering mechanism (2) comprises a filtering box (201) located directly below the electrolytic box (101) and having an upper plane bent downward, rectangular openings (202) being provided on both sides of the filtering box (201), a rectangular plate (203) being installed at the center of the inner top surface of the filtering box (201), and an inclined screen (204) fixedly connected to the rectangular plate (203) being installed at the end of each rectangular opening (202) on the inner wall of the filtering box (201).

2. A device for removing heavy metals from industrial wastewater according to claim 1, characterized in that: The lower end of the square tube (103) is in communication with the filter box (201) and the connection position is located on one side of the rectangular plate (203); the lower end of the delivery tube (105) is in communication with the filter box (201) and the connection position is located on the other side of the rectangular plate (203); and a second valve (10) is installed on the delivery tube (105) near the electrolysis box (101).

3. The device for removing heavy metals from industrial wastewater according to claim 1, characterized in that: A driving mechanism (3) is arranged on the rear side of the box body mechanism (1), and the driving mechanism (3) comprises a mounting plate (301) mounted on the rear side of the electrolytic box (101), a C-shaped plate (302) is mounted on the side of the mounting plate (301), and a motor (303) is mounted at the center of the side of the C-shaped plate (302).

4. The device for removing heavy metals from industrial wastewater according to claim 3, characterized in that: The driving end of the motor (303) passes through the U-shaped plate (302) and is installed with a first gear (310); two first racks (306) distributed up and down and meshing with the first gear (310) are correspondingly arranged on the side of the mounting plate (301); a first magnet (307) is installed at one end of each first rack (306); and an L-shaped plate (308) fixedly connected to the strip plate (106) on the same side is installed on the side of each first magnet (307).

5. The device for removing heavy metals from industrial wastewater according to claim 3, characterized in that: An adjustment mechanism (4) is arranged at the rear side of the box body mechanism (1) below the driving mechanism (3), and the adjustment mechanism (4) comprises two groups of mounting seats (401) distributed up and down and mounted on the rear side of the electrolytic box (101), a round rod (402) is installed between the two mounting seats (401) in each group, and two L-shaped frames (403) are slidably arranged on the two round rods (402), and one side of each baffle (104) extends to the outside of the square tube (103) and is fixedly connected to the L-shaped frame (403) on the same side.

6. The device for removing heavy metals from industrial wastewater according to claim 5, characterized in that: A middle cylinder (404) is fixedly mounted on each round rod (402) between the two L-shaped frames (403); a second gear (405) is rotatably mounted on the rear side of the electrolytic box (101) near the upper end of the L-shaped frame (403); a second rack (406) meshing with the second gear (405) is mounted on the side of each L-shaped frame (403); and the two second racks (406) are distributed up and down.

7. The device for removing heavy metals from industrial wastewater according to claim 1, characterized in that: The box body mechanism (1) and the filter mechanism (2) are jointly provided with a cleaning mechanism (5), the cleaning mechanism (5) comprising two groups of vertical plates (504), the two groups of vertical plates (504) being respectively located on one side of two strip plates (106), each vertical plate (504) having a strip groove (505) on its side, each strip groove (505) having a cylindrical movable block (506) with one end fixedly connected to the strip plate (106) on the same side, and each movable block (506) having a limit plate (507) installed on the other end.

8. The device for removing heavy metals from industrial wastewater according to claim 7, characterized in that: A side plate (503) is installed at the lower end of each group of two vertical plates (504), and a group of connecting rods (502) extending into the filter box (201) is correspondingly installed on the side of each side plate (503), and a scraper (501) located above the screen (204) is installed at the end of each group of two connecting rods (502) extending into the filter box (201).

9. The device for removing heavy metals from industrial wastewater according to claim 1, characterized in that: The box body mechanism (1) is also provided with an electrolysis mechanism (7), which comprises a U-shaped frame (701) installed at the upper end of the electrolysis box (101), an electric push rod (702) installed at the center of the upper side of the U-shaped frame (701), a fixing plate (703) installed at the lower end of the electric push rod (702), and two cylinders (704) are provided on the fixing plate (703), and a graphite rod (705) and a magnesium rod (706) are respectively provided in the two cylinders (704).

10. A method for removing heavy metals from industrial wastewater, comprising a device for removing heavy metals from industrial wastewater as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, electrolysis of wastewater, after placing wastewater into an electrolysis box (101), electrolysis of the wastewater is performed using an electrolysis mechanism (7) to generate floccules and precipitate; S2, stratification of wastewater, after the wastewater in the electrolytic box (101) is left to stand, the wastewater is stratified using two partitions (102), wherein the upper wastewater contains a small amount of sediment, and the lower wastewater contains a large amount of sediment; S3, wastewater filtration, introducing the wastewater from the upper and lower layers into the filtering mechanism (2) respectively, and filtering the wastewater from the upper and lower layers respectively using two screens (204); S4, sediment cleaning: during the process of restoring the position of the partition plate (102), the two scrapers (501) in the cleaning mechanism (5) are driven to move, and the sediment on the upper surfaces of the two screens (204) is scraped into the collection box (604).

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