Iron ore tailing pond wastewater recycling device

Abstract

The invention discloses an iron ore tailing pond wastewater recycling device which comprises a slurry pump, a primary filter tank, a plurality of comprehensive filter barrels, a reagent tank, a microbial incubator and a clean water tank. The flow guide pipe penetrates through the comprehensive filtering barrel from one side of the bottom of the comprehensive filtering barrel and then extends to the upper portion of the center of the flow guide cover, and an annular first filtering plate and an annular second filtering plate are sequentially arranged on the outer side of the bottom of the flow guide cover from bottom to top. A plurality of sludge collecting boxes for collecting settled sludge are arranged at the bottom of the first filter plate. According to the invention, the precipitated sludge can be layered, and the sludge with high microbial activity is retained, so that the integrated operation of rapid sampling and subsequent culture of the sludge can be realized, and a new idea is provided for treating tailing pond wastewater by indigenous microbial flora.

Description

Technical Field

[0001] The invention relates to the technical field of tailings pond wastewater treatment, and in particular to an iron ore tailings pond wastewater recovery and reuse device. Background Art

[0002] Tailings ponds are constructed by damming valley mouths or enclosing land to store tailings or other industrial waste from metal or non-metallic mines after ore sorting. Tailings produced by concentrators are not only large in quantity and fine in particle size, but the tailings water often contains various chemicals. If left untreated, these waters can cause serious environmental pollution around the concentrator. Proper storage of tailings in tailings ponds and recycling of the tailings water after clarification within the pond can effectively protect the environment.

[0003] Tailings pond wastewater usually contains heavy metals (such as Cu, Pb, Zn, Cd, As), suspended solids (SS), residual beneficiation reagents (such as xanthate, black medicine), cyanide (if any) and acidic / alkaline substances, and requires targeted treatment to meet discharge standards or reuse. Tailings pond wastewater treatment technologies generally include physical treatment (precipitation, filtration), chemical treatment (neutralization, sulfidation, oxidation, flocculation), biological treatment (artificial wetlands, biological adsorption), etc., and generally adopts a combination of multiple methods. Among them, the treatment effect of a single physical treatment method is limited, and the chemical treatment method is prone to secondary pollution. Microbial remediation has the characteristics of low energy consumption, economy, and environmental protection. Due to the complexity and diversity of microbial species, they cooperate with each other in the growth system and promote each other to form a stable microbial system. Therefore, increasing the proportion of biological treatment methods is of great significance to environmental protection.

[0004] Currently, the majority of tailings pond wastewater treatment uses cultivated exogenous microorganisms. However, these microorganisms suffer from poor adaptability, variability, high costs, and uncertain impacts on the environment and ecology, limiting their application. Indigenous microorganisms, on the other hand, offer advantages such as diversity, strong adaptability, and co-metabolism. By modifying environmental conditions and adding nutrients, they can be stimulated and domesticated, increasing their activity. These microorganisms hold great promise for remediation of contaminated soil and groundwater. Therefore, increasing the utilization of indigenous microorganisms will significantly advance the treatment of tailings pond wastewater. Currently, the use of indigenous microorganisms in iron ore tailings pond wastewater recycling and reuse facilities is very limited.

[0005] For example, the utility model patent with patent publication number CN217459084U provides an efficient tailings wastewater treatment system, which includes a vibrating dewatering screen, a concentrator, a dosing tank, a clear water tank, and a filter press. The water inlet of the vibrating dewatering screen is connected to a tailings pump, the water outlet of the vibrating dewatering screen is connected to the concentrator via a tailings wastewater metering pump, and the dosing tank is connected to the concentrator via a reagent metering pump. A mixing mechanism is provided on the top of the concentrator, and the tailings wastewater metering pump and the reagent metering pump are connected to the mixing mechanism. The overflow port of the concentrator is connected to the clear water tank via a pipe. The discharge port provided at the bottom of the concentrator is connected to the filter press via a lifting pump, and the liquid outlet of the filter press is connected to the clear water tank. A buffer tank is provided between the vibrating dewatering screen and the tailings wastewater metering pump. This system can improve the treatment efficiency of tailings wastewater. However, such tailings wastewater treatment systems lack relevant components for reusing indigenous microorganisms, resulting in limited treatment effects and are not environmentally friendly. Summary of the Invention

[0006] In response to the above-mentioned problems, the present invention provides a wastewater recycling and reuse device for an iron ore tailings pond.

[0007] The technical solution of the present invention is:

[0008] An iron ore tailings pond wastewater recycling and reuse device includes a slurry pump, a primary filter tank, several integrated filter barrels, a reagent tank, a microbial incubator, and a clear water tank;

[0009] The slurry pump is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is connected to the inside of the tailings pond, the liquid outlet pipe is connected to the primary filter tank, and the output end of the primary filter tank is provided with a plurality of guide pipes, each of which is connected to each of the integrated filter barrels in a one-to-one correspondence;

[0010] An annular flow guide cover is provided in the middle of the integrated filter barrel, and the flow guide pipe extends from one side of the bottom of the integrated filter barrel through the integrated filter barrel to the upper part of the center of the flow guide cover. The bottom of the flow guide cover is fixedly connected to the flow guide pipe, and an annular first filter plate and a second filter plate are provided on the outer side of the bottom of the flow guide cover from bottom to top. The first filter plate is fixedly connected to the outer wall of the flow guide cover, and the second filter plate is connected to the flow guide cover in an up-and-down sliding manner. A plurality of mud collecting boxes for collecting settled sludge are provided at the bottom of the first filter plate.

[0011] An overflow pipe is provided on the top of the comprehensive filtering barrel, the overflow pipe is connected to the reagent pool, the reagent pool is connected to the clean water pool, and each of the mud collecting boxes is connected to the microbial incubator.

[0012] Furthermore, the pore size of the first filter plate is 8-10 meshes, and the pore size of the second filter plate is 10-12 meshes.

[0013] Note: By optimizing and adjusting the apertures of the first filter plate and the second filter plate, most of the sludge inside the integrated filter barrel can be precipitated downward through the second filter plate, while a portion can continue to precipitate through the first filter plate, while sludge with high microbial activity is retained between the first filter plate and the second filter plate.

[0014] Furthermore, a plurality of scrapers are provided on the upper surface of the second filter plate, and each of the scrapers is fixedly connected by a rotating ring. The rotating ring rotates with the outer wall of the air guide cover and is connected with the upper and lower limit switches. The connection between the rotating ring and each scraper is connected to the bottom of the second filter plate through a spring telescopic rod. The second filter plate is driven to rotate by a driving motor located above the integrated filter barrel. A cylindrical protrusion is provided on each side of the second filter plate, and the protrusion is slidably connected with the arc grooves provided on both sides of the inner wall of the integrated filter barrel, so that the second filter plate slides up and down while rotating. The bottom of each scraper corresponds to one of the mud collecting boxes.

[0015] Description: The scraper, mud collecting box and other related components can be set to conveniently, quickly and efficiently realize the recycling of sludge between the first filter plate and the second filter plate.

[0016] Furthermore, a circle of annular limiting protrusions is provided on the inner wall of the rotating ring, and the limiting protrusions are rotatably connected to the annular groove provided on the outer wall of the air deflector.

[0017] Note: The limiting protrusion and the annular groove prevent the rotating ring from moving up and down during rotation.

[0018] Furthermore, the number of the scrapers and the mud collecting boxes is 2 to 4, and when the second filter plate is located at the lowest point, the positions of the scrapers and the mud collecting boxes overlap one by one.

[0019] Note: By overlapping the scraper and the mud collecting box, the falling of unnecessary sludge is reduced, so that the sludge with high microbial activity retained between the first filter plate and the second filter plate falls into the space as the scraper rotates.

[0020] Furthermore, a telescopic connecting rod is provided at the output end of the driving motor, and a bevel gear is provided at the end of the telescopic connecting rod. The bevel gear is meshed with the tooth groove provided on the inner edge of the second filter plate, and an upwardly extending slot is provided at the connection between the corresponding bevel gear and the tooth groove on the air guide cover. The telescopic connecting rod includes an inner rod and an outer rod that are slidably sleeved, and the outer rod is connected to the output end of the driving motor. A limit slide is provided on each side of the outside of the inner rod, and the limit slide is slidably connected to the limit slide grooves provided on both sides of the inside of the outer rod.

[0021] Note: The limiting slide bar and limiting slot are used to maintain the stability of the telescopic pole when it is extending and retracting and drives the bevel gear to rotate and rise and fall.

[0022] Furthermore, a water-permeable hole is arranged at the bottom of the air guide cover corresponding to the top of the first filter plate, and the water-permeable hole extends to the highest movable point of the second filter plate. The top of the air guide cover exceeds the top of the integrated filter barrel, and the bottom of the air guide cover is open.

[0023] Note: The setting of the water-permeable holes can not only make the sludge sedimentation at the bottom of the guide cover more smooth, but also can cooperate with the lifting of the second filter plate to promote the discharge efficiency during the sludge discharge stage, which has functional diversity.

[0024] Furthermore, a drying box for drying sludge is provided inside the microbial incubator. The top of the mud collecting box is open, and the bottom of the mud collecting box is inclined outward from the center of the integrated filter barrel. A mud guide pipe is provided at the end of the mud collecting box, which passes through the integrated filter barrel and is connected to the drying box. A heating box is provided on one side of the drying box, a heating rod is provided at the bottom of the heating box, and a culture medium replenishing box is provided on one side of the heating box.

[0025] Description: The microbial incubator can be used to immediately culture the sludge that retains high microbial activity, so that the cultured indigenous microbial flora can be used in subsequent wastewater treatment.

[0026] Furthermore, the number of the integrated filter barrels is 3 to 8, and observation windows are provided on the side walls of the integrated filter barrels corresponding to the positions of the first filter plate and the second filter plate. Conduits are provided between the reagent pool and the clean water pool, and between the microbial incubator and the reagent pool. Solenoid valves are provided on the diversion pipe, overflow pipe, conduit, and mud guide pipe.

[0027] Note: The observation window facilitates observation of sludge removal, and multiple solenoid valves are used to control the entire system.

[0028] The beneficial effects of the present invention are:

[0029] The design starting point of the iron ore tailings wastewater recycling and reuse device of the present invention is how to use the indigenous microorganisms in the tailings wastewater immediately after cultivation for subsequent wastewater treatment. Therefore, we set up a dedicated integrated filter barrel, which can stratify the precipitated sludge. In the stratified sludge, the sludge with high microbial activity is retained between the first filter plate and the second filter plate. The substrate is rich, and the organic particles settled in the upper layer (such as extracellular polymers EPS and residual organic matter) are largely degraded here. At the same time, the metabolic diversity is strong, and facultative anaerobic bacteria (such as denitrifying bacteria) and aerobic bacteria coexist, forming a complex ecological niche. The sludge flocs are the loosest in this area, with a large specific surface area, which is conducive to the attachment and growth of microorganisms. At the same time, supporting related structural components are designed for the sampling of the sludge in this area, so that the integrated operation of rapid sludge sampling and subsequent cultivation can be realized, providing a new idea for the treatment of tailings wastewater by indigenous microbial flora. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of an iron ore tailings pond wastewater recovery and reuse device of the present invention;

[0031] Figure 2 This is a structural schematic diagram of a comprehensive filter barrel in an iron ore tailings pond wastewater recycling and reuse device of the present invention;

[0032] Figure 3 This is a schematic diagram of the internal structure of the comprehensive filter barrel of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the integrated filter barrel of the present invention after omitting the guide cover;

[0034] Figure 5 This is a schematic diagram of the internal structure of the integrated filter barrel of the present invention after omitting the guide cover and the second filter plate;

[0035] Figure 6 This is a schematic diagram of the inner wall arc groove structure of the integrated filter barrel of the present invention when viewed from the front;

[0036] Figure 7 It is a top view of the comprehensive filter barrel of the present invention;

[0037] Figure 8 This is a schematic diagram of the internal structure of the integrated filter barrel of the present invention when viewed from the front;

[0038] Figure 9 This is a schematic structural diagram of the integrated filter barrel of the present invention after the second filter plate inside is rotated when viewed from the front;

[0039] Figure 10 It is a schematic structural diagram of the air guide cover of the present invention;

[0040] Figure 11is a cross-sectional view of the telescopic connecting rod of the present invention;

[0041] Figure 12 It is a schematic diagram of the internal structure of the microorganism incubator of the present invention.

[0042] Among them, 1-slurry pump, 11-liquid inlet pipe, 12-liquid outlet pipe, 2-primary filter tank, 21-guide pipe, 3-integrated filter barrel, 31-first filter plate, 32-second filter plate, 321-bump, 322-tooth groove, 33-mud collection box, 331-mud guide pipe, 34-overflow pipe, 35-scraper, 36-rotating ring, 361-limiting protrusion, 37-spring telescopic rod, 38-arc groove, 39-viewing Inspection window, 4-reagent tank, 41-catheter, 5-microorganism incubator, 51-drying box, 52-heating box, 53-heating rod, 54-culture medium replenishing box, 6-clean water tank, 7-flow guide cover, 71-annular groove, 72-slot, 73-water hole, 8-drive motor, 81-telescopic connecting rod, 82-bevel gear, 83-inner rod, 84-outer rod, 85-limiting slide, 86-limiting slide, 9-solenoid valve. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figure 1 As shown, a wastewater recycling and reuse device for an iron ore tailings pond includes a slurry pump 1, a primary filter tank 2, four integrated filter barrels 3, a reagent tank 4, a microbial incubator 5, and a clear water tank 6. The slurry pump 1 is provided with an inlet pipe 11 and an outlet pipe 12. The slurry pump 1 is a commercially available high-power slurry pump. The inlet pipe 11 is connected to the inside of the tailings pond, and the outlet pipe 12 is connected to the primary filter tank 2. A plurality of guide pipes 21 are provided at the output end of the primary filter tank 2. Each guide pipe 21 is connected to each integrated filter barrel 3 in a one-to-one correspondence. The primary filter tank 2 is a commercially available gravity valveless filter tank.

[0045] like Figures 2 to 4 As shown, an annular flow guide cover 7 is provided in the middle of the integrated filter barrel 3, and the flow guide pipe 21 extends from one side of the bottom of the integrated filter barrel 3 through the integrated filter barrel 3 and then extends to the upper part of the center of the flow guide cover 7. The bottom of the flow guide cover 7 is fixedly connected to the flow guide pipe 21, and the outer side of the bottom of the flow guide cover 7 is provided with an annular first filter plate 31 and a second filter plate 32 from bottom to top. The aperture of the first filter plate 31 is 9 mesh, and the aperture of the second filter plate 32 is 11 mesh. The first filter plate 31 is fixedly connected to the outer wall of the flow guide cover 7, and the second filter plate 32 is connected to the flow guide cover 7 for sliding up and down. A plurality of mud collecting boxes 33 for collecting settled sludge are provided at the bottom of the first filter plate 31;

[0046] like Figures 5 to 8 、 Figure 10As shown, three scrapers 35 are provided on the upper surface of the second filter plate 32, and each scraper 35 is fixedly connected by a rotating ring 36. The rotating ring 36 rotates with the outer wall of the air deflector 7 and is connected with the upper and lower limit positions. The inner wall of the rotating ring 36 is provided with a circle of annular limiting protrusions 361, and the limiting protrusions 361 are rotatably connected with the annular groove 71 provided on the outer wall of the air deflector 7. The connection between the rotating ring 36 and each scraper 35 is connected to the bottom of the second filter plate 32 through a spring telescopic rod 37. The second filter plate 32 is driven to rotate by a driving motor 8 located above the integrated filter barrel 3. Both sides of the second filter plate 32 Each is provided with a cylindrical protrusion 321, which is slidably connected to the arc-shaped grooves 38 provided on both sides of the inner wall of the integrated filter barrel 3, so as to make the second filter plate 32 slide up and down while rotating. The bottom of each scraper 35 corresponds to a mud collection box 33. When the second filter plate 32 is at the lowest point, each scraper 35 and each mud collection box 33 coincide with each other in a one-to-one correspondence. The bottom of the deflector 7 is provided with a water permeable hole 73 corresponding to the top of the first filter plate 31. The water permeable hole 73 extends to the highest point where the second filter plate 32 can move. The top of the deflector 7 exceeds the top of the integrated filter barrel 3, and the bottom of the deflector 7 is open.

[0047] like Figure 9 、 Figure 11 As shown, a telescopic connecting rod 81 is provided at the output end of the driving motor 8, and a bevel gear 82 is provided at the end of the telescopic connecting rod 81. The bevel gear 82 is meshed with the tooth groove 322 provided on the inner edge of the second filter plate 32, and an upwardly extending slot 72 is provided at the connection between the corresponding bevel gear 82 and the tooth groove 322 on the air guide cover 7. The telescopic connecting rod 81 includes an inner rod 83 and an outer rod 84 that are slidably sleeved. The outer rod 84 is connected to the output end of the driving motor 8. A limiting slide 85 is provided on each side of the outer side of the inner rod 83. The limiting slide 85 is slidably connected to the limiting slide groove 86 provided on both sides of the inner side of the outer rod 84.

[0048] like Figure 1 、 Figure 2 、 Figure 12As shown, an overflow pipe 34 is provided on the top of the integrated filter barrel 3, the overflow pipe 34 is connected to the reagent pool 4, the reagent pool 4 is connected to the clean water pool 6, and each mud collecting box 33 is connected to the microbial incubator 5. A drying box 51 for drying the sludge is provided inside the microbial incubator 5. A drying fan is provided inside the drying box 51. The top of the mud collecting box 33 is open, and the bottom of the mud collecting box 33 is tilted outward from the center of the integrated filter barrel 3. A mud guide pipe 331 is provided at the end of the mud collecting box 33 and passes through the integrated filter barrel 3 and is connected to the drying box 51. A heating box is provided on one side of the drying box 51. 52. A heating rod 53 is provided at the bottom of the heating box 52. The heating rod 53 is a commercially available heating rod. A culture medium replenishing box 54 is provided on one side of the heating box 52. The culture medium can be LB culture medium or R2A culture medium. An observation window 39 is provided on the side wall of the integrated filter barrel 3 corresponding to the first filter plate 31 and the second filter plate 32. A conduit 41 is provided between the reagent pool 4 and the clean water pool 6, and between the microbial incubator 5 and the reagent pool 4. A solenoid valve 9 is provided on the guide pipe 21, the overflow pipe 34, the conduit 41, and the mud guide pipe 331. The solenoid valve is a commercially available ZCQ air-controlled solenoid valve.

[0049] Example 2

[0050] This embodiment differs from embodiment 1 in that:

[0051] There are 3 integrated filter barrels.

[0052] Example 3

[0053] This embodiment differs from embodiment 1 in that:

[0054] The number of integrated filter barrels 3 is 8.

[0055] Example 4

[0056] This embodiment differs from embodiment 1 in that:

[0057] Two scrapers 35 are provided on the upper surface of the second filter plate 32 , and the bottom of each scraper 35 corresponds to a mud collecting box 33 .

[0058] Example 5

[0059] This embodiment differs from embodiment 1 in that:

[0060] Four scrapers 35 are provided on the upper surface of the second filter plate 32 , and the bottom of each scraper 35 corresponds to a mud collecting box 33 .

[0061] Note: When the frequency of sludge discharge is high, more scrapers 35 can be selected. At the same time, the up and down range of the second filter plate 32 can be reduced during sampling. When the frequency of sludge discharge is low, fewer scrapers 35 can be selected. At this time, more sludge accumulates and the resistance to sludge discharge is greater. Therefore, the corresponding up and down range of the second filter plate 32 is also higher, and the higher elevation of the water permeable hole 73 promotes sludge discharge.

[0062] Example 6

[0063] This embodiment differs from embodiment 1 in that:

[0064] The pore size of the first filter plate 31 is 8 meshes, and the pore size of the second filter plate 32 is 10 meshes.

[0065] Example 7

[0066] This embodiment differs from embodiment 1 in that:

[0067] The pore size of the first filter plate 31 is 10 mesh, and the pore size of the second filter plate 32 is 12 mesh.

[0068] Working principle:

[0069] The working principle of the iron ore tailings pond wastewater recovery and reuse device of the present invention is briefly described below.

[0070] During use, the tailings pond wastewater to be treated is first pumped to the primary filter pool 2 through the slurry pump 1, and the primary filtration removes stones, fallen leaves, industrial garbage or plastic and other debris. Then, the wastewater after the primary filtration enters the comprehensive filter barrel 3 through the guide pipe 21, flows out from the top of the guide cover 7, flows downward and settles, and the precipitated sludge is filtered by the second filter plate 32 and the first filter plate 31 and stratified and precipitated inside the guide cover 7. The permeable holes 73 will also promote the precipitation between the second filter plate 32 and the first filter plate 31 to a certain extent, so that a good nutrition-anoxic transition zone is formed, with rich substrate and organic particles (such as extracellular polymers) settled in the upper layer. The sludge flocs are loosest in this area, with a large specific surface area, which is conducive to the attachment and growth of microorganisms. The sludge below the first filter plate 31 is discharged through the sludge outlet at the bottom of the integrated filter barrel 3, while the sludge above the second filter plate 32 can be pumped out by the pump group. The sludge can be pumped out when the second filter plate 32 rises to the maximum height. The precipitated wastewater enters the reagent tank 4 through the overflow pipe 34.

[0071] When the filter 32 is in the working state, the filter 32 is rotated, and the filter 32 is rotated, so that the filter 32 is rotated.

[0072] At the same time, as the second filter plate 32 rotates, the rotating ring 36 connected by multiple spring telescopic rods 37 also rotates accordingly, and the limiting protrusion 361 rotates inside the annular groove 71 to ensure that the rotating ring 36 remains stable up and down when rotating, thereby driving each scraper 35 to rotate, so that each scraper 35 rotates to a position corresponding to the next mud collection box 33. Since the initial position of the scraper 35 is above the mud collection box 33, this process just causes the sludge deposited between the two scrapers 35 to be scraped into the corresponding mud collection box 33. At this time, the second filter plate 32 also just reaches the maximum position, and the water permeable hole 73 is completely exposed between the second filter plate 32 and the first filter plate 31. The sludge is discharged into the mud guide pipe 331 through the promotion of water flow and the tilting effect of the mud collection box 33, thereby opening the corresponding solenoid valve 9 for recovery.

[0073] The above sludge recovery process lasts for 5 to 10 minutes, and then the second filter plate 32 is reset in the same manner as above, so that it can proceed to the next cycle of sludge sedimentation.

[0074] The sludge with high microbial activity is dried in a drying oven 51 and mixed with distilled water at a ratio of 1g:100mL. The mixture is then added to a heating oven 52 and incubated at 35°C with shaking for 12-24 hours. The supernatant is then collected and inoculated into a sterilized liquid culture medium at a 10% inoculum rate. The culture is then sealed and incubated at a constant temperature of 35°C in the dark in heating oven 52. This process is repeated every three days. After five generations of culture, the sludge can be used for subsequent wastewater treatment. Due to the relatively long incubation cycle, each batch of sludge treated may contain microorganisms cultured from the previous batch of sludge, ultimately achieving a dynamic cycle.

[0075] 10mL of microbial flora with a growth time of 3 days was added to the wastewater in the reagent pool 4 for treatment. At this time, the wastewater in the reagent pool 4 had been treated with chemical neutralization, flocculation, etc., and the pH was adjusted to 6-7. Then, microbial treatment was performed, and finally, the Zn and Cr in the tailings wastewater were reduced. 6+ The removal rate of heavy metal pollutants such as chlorinated parasites reaches more than 98%, and the use of indigenous bacteria can save about 5 to 10% of costs, which has good commercial value.

Claims

1. An iron ore tailings pond wastewater recycling and reuse device, characterized in that: It includes a slurry pump (1), a primary filter tank (2), a plurality of integrated filter barrels (3), a reagent tank (4), a microbial incubator (5) and a clear water tank (6); The slurry pump (1) is provided with a liquid inlet pipe (11) and a liquid outlet pipe (12), the liquid inlet pipe (11) is connected to the interior of the tailings pond, the liquid outlet pipe (12) is connected to the primary filter pool (2), and the output end of the primary filter pool (2) is provided with a plurality of guide pipes (21), and each of the guide pipes (21) is connected to each of the integrated filter barrels (3) in a one-to-one correspondence; An annular flow guide cover (7) is provided in the middle of the integrated filter barrel (3), the flow guide pipe (21) extends from one side of the bottom of the integrated filter barrel (3) through the integrated filter barrel (3) and then extends to the upper center of the flow guide cover (7), the bottom of the flow guide cover (7) is fixedly connected to the flow guide pipe (21), and an annular first filter plate (31) and a second filter plate (32) are sequentially provided on the outer side of the bottom of the flow guide cover (7) from bottom to top, the first filter plate (31) is fixedly connected to the outer wall of the flow guide cover (7), and the second filter plate (32) is slidably connected to the flow guide cover (7) up and down, and a plurality of mud collecting boxes (33) for collecting sediment sludge are provided at the bottom of the first filter plate (31); An overflow pipe (34) is provided on the top of the integrated filter barrel (3), the overflow pipe (34) is connected to the reagent pool (4), the reagent pool (4) is connected to the clean water pool (6), and each of the mud collection boxes (33) is connected to the microbial incubator (5).

2. The iron ore tailings pond wastewater recycling and reuse device according to claim 1, characterized in that: The pore size of the first filter plate (31) is 8 to 10 meshes, and the pore size of the second filter plate (32) is 10 to 12 meshes.

3. The iron ore tailings pond wastewater recycling and reuse device according to claim 1, characterized in that: A plurality of scrapers (35) are provided on the upper surface of the second filter plate (32), and each of the scrapers (35) is fixedly connected by a rotating ring (36). The rotating ring (36) rotates with the outer wall of the deflector (7) and is connected with the upper and lower limit positions. The connection between the rotating ring (36) and each scraper (35) is connected to the bottom of the second filter plate (32) through a spring telescopic rod (37). The second filter plate (32) is driven to rotate by a driving motor (8) located above the integrated filter barrel (3). A cylindrical protrusion (321) is provided on each side of the second filter plate (32). The protrusion (321) is slidably connected to the arc groove (38) provided on both sides of the inner wall of the integrated filter barrel (3) to enable the second filter plate (32) to slide up and down while rotating. The bottom of each scraper (35) corresponds to one of the mud collecting boxes (33).

4. The iron ore tailings wastewater recycling and reuse device according to claim 3, characterized in that: The inner wall of the rotating ring (36) is provided with a circle of annular limiting protrusions (361), and the limiting protrusions (361) are rotatably connected to the annular grooves (71) provided on the outer wall of the deflector (7).

5. The iron ore tailings wastewater recycling and reuse device according to claim 3, characterized in that: The number of the scrapers (35) and the mud collecting boxes (33) is 2 to 4, and when the second filter plate (32) is at the lowest point, the positions of the scrapers (35) and the mud collecting boxes (33) correspond to each other and overlap one by one.

6. The iron ore tailings wastewater recycling and reuse device according to claim 3, characterized in that: The output end of the driving motor (8) is provided with a telescopic connecting rod (81), and the end of the telescopic connecting rod (81) is provided with a bevel gear (82), and the bevel gear (82) is meshed with a tooth groove (322) provided on the inner edge of the second filter plate (32), and a groove (72) extending upward is provided at the connection between the corresponding bevel gear (82) and the tooth groove (322) on the deflector (7), and the telescopic connecting rod (81) includes an inner rod (83) and an outer rod (84) that are slidably sleeved, and the outer rod (84) is connected to the output end of the driving motor (8), and a limiting slide bar (85) is provided on both sides of the outer side of the inner rod (83), and the limiting slide bar (85) is slidably connected to the limiting slide groove (86) provided on both sides of the inner side of the outer rod (84).

7. The iron ore tailings pond wastewater recycling and reuse device according to claim 3, characterized in that: The bottom of the deflector (7) is provided with a water-permeable hole (73) corresponding to the top of the first filter plate (31), and the water-permeable hole (73) extends to the highest movable point of the second filter plate (32). The top of the deflector (7) exceeds the top of the integrated filter barrel (3), and the bottom of the deflector (7) is open.

8. The iron ore tailings wastewater recycling and reuse device according to claim 1, characterized in that: A drying box (51) for drying sludge is provided inside the microbial culture box (5); the top of the mud collecting box (33) is open, and the bottom of the mud collecting box (33) is tilted outward from the center of the integrated filter barrel (3); a mud guide pipe (331) provided at the end of the mud collecting box (33) passes through the integrated filter barrel (3) and is connected to the drying box (51); a heating box (52) is provided on one side of the drying box (51); a heating rod (53) is provided at the bottom of the heating box (52); and a culture medium supplement box (54) is provided on one side of the heating box (52).

9. The iron ore tailings wastewater recycling and reuse device according to claim 8, characterized in that: The number of the integrated filter barrels (3) is 3 to 8. An observation window (39) is provided on the side wall of the integrated filter barrel (3) at the position corresponding to the first filter plate (31) and the second filter plate (32). A conduit (41) is provided between the reagent pool (4) and the clean water pool (6), and between the microbial incubator (5) and the reagent pool (4). The flow guide pipe (21), the overflow pipe (34), the conduit (41), and the mud guide pipe (331) are all provided with an electromagnetic valve (9).

Images