Wastewater treatment device and treatment method for heavy metal remediation

Abstract

The invention relates to the technical field of sewage treatment, and provides a wastewater treatment device for heavy metal remediation and a treatment method.The wastewater treatment device comprises a treatment pond, a first motor is fixedly mounted at the bottom end of the treatment pond, a threaded shaft is mounted at the upper end of the first motor, and a separation mechanism is connected to the middle of the threaded shaft; and the upper end of the separation mechanism is connected with a stirring mechanism. Waste water is subjected to layering treatment through the separation mechanism, sewage and treated medicine powder are evenly mixed, uneven reaction of the waste water in the treatment process is avoided, the stirring mechanism shovels up the sewage on the separation mechanism along the inclined face of the turning plate, the sewage is divided into several bundles on the flow guide groove to flow out, and meanwhile due to the fact that the stirring mechanism and the medicine throwing mechanism synchronously rotate, the stirring effect is good. The medicine powder in the medicine storage grids is taken out by the roller according to the amount, the situation that the proportion of the medicine is imbalanced due to the fact that the medicine is put too much is prevented, and sewage shunted on the flow guide groove is evenly mixed with the medicine powder rolled out on the roller through impact of water flow in the spraying process.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device and method for heavy metal remediation. Background Technology

[0002] Existing heavy metal wastewater treatment equipment suffers from the following technical problems during use: In existing heavy metal treatment tanks, the treatment agent is directly poured into the tank during degradation. The stirring device alone cannot quickly and evenly mix the agent, resulting in excessively high local concentrations, violent reactions, and the formation of large crystals. Edge reactions are weak, and sedimentation is poor. Excessive reaction reagents or extended stirring time are required to completely react with the wastewater in the treatment tank, leading to waste of reaction reagents and a high risk of secondary pollution from excessive addition. Degradation efficiency is low. Furthermore, the existing stirring devices have a small overall cross-sectional area, failing to provide a large-scale turbulent agitation of the liquid. The long stirring time and poor overall mixing effect negatively impact the removal efficiency of heavy metal ions.

[0003] Therefore, we have made improvements to this and proposed a wastewater treatment device and method for heavy metal remediation. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the agent is not evenly distributed, the degradation efficiency is low, the mixing effect is poor, and the removal efficiency of heavy metal ions is low.

[0005] To achieve the above-mentioned objectives, the present invention provides a wastewater treatment device for heavy metal remediation, comprising a treatment tank, a first motor fixedly installed at the bottom of the treatment tank, a threaded shaft installed at the upper end of the first motor, a separating mechanism connected to the middle of the threaded shaft, a stirring mechanism connected to the upper end of the separating mechanism, a chemical spraying mechanism fixedly installed at the upper end of the stirring mechanism, the chemical spraying mechanism being rotatably connected to the treatment tank, and a connecting frame installed at the inner end of the chemical spraying mechanism, the connecting frame being sleeved on the threaded shaft.

[0006] As a further embodiment of the present invention, the treatment pool includes a pool body, an inlet pipe is fixedly connected to the bottom of the pool body, and a toothed ring is installed on the upper edge of the pool body.

[0007] As a further embodiment of the present invention, the threaded shaft includes a screw, the upper end of which is connected to a first gear, and a second motor is mounted on the top end of the first gear, the second motor being fixedly mounted on the top end of the screw.

[0008] As a further embodiment of the present invention, the separating mechanism includes a first partition and a second partition, a connecting sleeve is connected to the middle of the first partition and the second partition, the connecting sleeve is threadedly connected to a threaded shaft, a connecting layer is connected to the edge of the first partition, a water outlet pipe is connected to the bottom of the second partition, a sieve hole is opened in the middle of the first partition, a corrugated pipe is connected to the middle of the first partition and the second partition, and a one-way plate is installed at the upper end of the corrugated pipe.

[0009] As a further embodiment of the present invention, the stirring mechanism includes a flap, the bottom of which is connected to a base plate, and a slider is installed on the bottom of the base plate. The slider is slidably mounted on the upper end of the separating mechanism. A movable door is hinged between the flap and the base plate, and several partitions are installed inside the movable door.

[0010] As a further embodiment of the present invention, the flap is spiral-shaped, the top of the flap is installed on the agent spraying mechanism, and the upper edge of the flap is provided with a number of semi-circular notches for guiding grooves.

[0011] As a further embodiment of the present invention, the drug dispensing mechanism includes a drug storage compartment, with mounting frames connected to both ends of the drug storage compartment. The bottom end of the mounting frame is fixedly connected to the stirring mechanism, and a roller is rotatably connected to the bottom of the mounting frame. A second gear is connected to the inner end of the roller, and the second gear meshes with a first gear. A third gear is connected to the outer end of the roller, and the third gear meshes with a gear ring.

[0012] A wastewater treatment method for heavy metal remediation, employing the aforementioned wastewater treatment device for heavy metal remediation, includes the following steps: S1. Wastewater containing heavy metals is discharged into the tank through the inlet pipe. The separation mechanism is located at the top of the treatment tank. A first motor drives a threaded shaft to rotate, causing the separation mechanism to squeeze the wastewater downwards. The wastewater is then forced through the corrugated pipe to the top of the first partition, separating the wastewater into upper and lower layers. The upper end of the stirring mechanism and the chemical spraying mechanism are fixed at the same height as the top of the treatment tank, but the bottom end of the stirring mechanism is connected to the separation mechanism. As the separation mechanism rises and falls, the stirring mechanism extends and retracts, and the movable door and partition also extend and unfold. After separation, a second motor drives the first gear to rotate, causing the first gear to mesh with the second gear. The first gear drives the second gear to rotate, causing the stirring mechanism and the chemical spraying mechanism to rotate. The system rotates above the separating mechanism, scooping up the wastewater along the inclined surface of the flap and causing it to flow out in several streams on the guide channel. Simultaneously, due to the connection between the roller and the second gear, the roller rotates at the bottom of the medicine storage compartment, rolling out the medicine powder inside the compartment and evenly sprinkling it onto the water flow. As the water flows downwards, the medicine powder mixes with the wastewater. At the same time, the wastewater is stirred by the rotation of the stirring mechanism, causing the heavy metal clumps in the wastewater to separate. The first gear reverses, causing the flap and the bottom plate to rotate in opposite directions, allowing the heavy metal crystals in the wastewater to pass through the partition and enter the space between the flap and the bottom plate. The separated clean water passes through the sieve holes into the partition between the first and second partitions and is finally discharged in the outlet pipe. S2. After the internal sewage is treated, the first motor continues to rotate, pulling the separation mechanism and stirring mechanism down a bit more, so that the sewage in the tank flows up to the top of the separation mechanism again, and repeats the above steps to treat this part of the sewage until all the sewage is treated. S3. After the wastewater in the treatment tank is completely treated, all the heavy metal clumps generated during the treatment will be stored between the flap and the bottom plate. Pull the movable door and partition to one side to remove all the clumps.

[0013] The wastewater treatment device and method for heavy metal remediation provided by this invention have the following advantages: 1. By discharging wastewater containing heavy metals into the tank and treating it in layers through a separation mechanism, the wastewater and the treatment powder are evenly mixed to avoid uneven reaction during the treatment process. The first gear drives the stirring mechanism and the agent spraying mechanism to rotate together inside the treatment tank, scooping up the wastewater on the separation mechanism along the inclined surface of the flap and dividing it into several streams that flow out on the guide channel. At the same time, because the stirring mechanism and the agent spraying mechanism rotate synchronously, the rollers carry out the powder in the storage compartment in the correct amount, preventing excessive dosage and resulting in an imbalance in the drug ratio. Furthermore, the wastewater diverted on the guide channel is evenly mixed with the powder rolled out on the rollers by the impact of the water flow during the spraying process.

[0014] 2. By leaving a gap between the flap and the bottom plate, and using a hinged movable door for separation, and installing a one-way partition in the middle of the movable door, heavy metal crystals in the sewage are stored when the flap and the bottom plate rotate in opposite directions, which facilitates sewage treatment. The movable door and partition are pulled to one side to remove all the clumps.

[0015] 3. By connecting the separation mechanism in the middle of the threaded shaft, a gap is left between the folded first partition and the second partition, and a screen hole is opened on the first partition, so that the separated clean water enters the partition between the first partition and the second partition through the screen hole, and is finally discharged in the outlet pipe, thus separating the heavy metal clumps and treating the sewage until all the sewage is treated. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a wastewater treatment device for heavy metal remediation provided in this application; Figure 2 A structural cross-sectional view of a wastewater treatment device for heavy metal remediation provided in this application; Figure 3 A schematic diagram of the threaded shaft and separation mechanism of a wastewater treatment device for heavy metal remediation provided in this application; Figure 4 A schematic diagram of the separation mechanism structure of a wastewater treatment device for heavy metal remediation provided in this application; Figure 5 A schematic diagram of the front structure of the stirring mechanism of a wastewater treatment device for heavy metal remediation provided in this application; Figure 6 A schematic diagram of the reverse side structure of the stirring mechanism of a wastewater treatment device for heavy metal remediation provided in this application; Figure 7 A schematic diagram of the reagent spraying mechanism of a wastewater treatment device for heavy metal remediation provided in this application; Figure 8 for Figure 2 Enlarged schematic diagram of the structure at point A; Figure 9 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0018] In the diagram: 1. Treatment tank; 11. Tank body; 12. Inlet pipe; 13. Gear ring; 2. First motor; 3. Threaded shaft; 31. Screw; 32. First gear; 33. Second motor; 4. Separation mechanism; 41. First partition; 42. Second partition; 43. Connecting layer; 44. Connecting sleeve; 45. Screen hole; 46. Outlet pipe; 47. Corrugated pipe; 48. One-way plate; 5. Stirring mechanism; 51. Flip plate; 52. Guide channel; 53. Bottom plate; 54. Sliding block; 55. Movable door; 56. Partition; 6. Chemical spraying mechanism; 61. Chemical storage compartment; 62. Roller; 63. Second gear; 64. Third gear; 65. Mounting frame; 7. Connecting frame. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0020] like Figures 1-9 As shown, this embodiment proposes a wastewater treatment device for heavy metal remediation, including a treatment tank 1. A first motor 2 is fixedly installed at the bottom of the treatment tank 1. A threaded shaft 3 is installed at the upper end of the first motor 2. A separating mechanism 4 is connected to the middle of the threaded shaft 3. A stirring mechanism 5 is connected to the upper end of the separating mechanism 4. A chemical spraying mechanism 6 is fixedly installed at the upper end of the stirring mechanism 5. The chemical spraying mechanism 6 is rotatably connected to the treatment tank 1. A connecting frame 7 is installed at the inner end of the chemical spraying mechanism 6. The connecting frame 7 is sleeved on the threaded shaft 3.

[0021] The treatment tank 1 includes a tank body 11. A water inlet pipe 12 is fixedly connected to the bottom of the tank body 11. A toothed ring 13 is installed on the upper edge of the tank body 11. The tank body 11 stores sewage. Sewage is injected into the tank body 11 from bottom to top. The toothed ring 13 is connected to the chemical spraying mechanism 6, so that the chemical spraying mechanism 6 rotates according to the trajectory.

[0022] The threaded shaft 3 includes a screw 31, with a first gear 32 connected to the upper end of the screw 31. A second motor 33 is mounted on the top of the first gear 32 and is fixedly mounted on the top of the screw 31. The screw 31 is connected and fixed to the first motor 2 to adjust the separation mechanism 4 up and down. The first gear 32 is connected and fixed to the second motor 33 to drive the chemical spraying mechanism 6 to rotate, so that the stirring mechanism 5 and the chemical spraying mechanism 6 perform wastewater stratification treatment above the separation mechanism 4.

[0023] The separating mechanism 4 includes a first partition 41 and a second partition 42. A connecting sleeve 44 is connected to the middle of the first partition 41 and the second partition 42. The connecting sleeve 44 is threadedly connected to the threaded shaft 3. A connecting layer 43 is connected to the edge of the first partition 41. A water outlet pipe 46 is connected to the bottom of the second partition 42. A screen hole 45 is opened in the middle of the first partition 41. A corrugated pipe 47 is connected to the middle of the first partition 41 and the second partition 42. A one-way plate 48 is installed at the upper end of the corrugated pipe 47. The corrugated pipe 47 squeezes the sewage from the bottom of the separating mechanism 4 upward in one direction. The sewage is treated separately above the separating mechanism 4. The heavy metals in the sewage are separated by the first partition 41, so that the purified sewage is discharged separately through the water outlet pipe 46.

[0024] The stirring mechanism 5 includes a flap 51, the bottom of which is connected to a base plate 53. A slider 54 is installed on the bottom of the base plate 53. The slider 54 is slidably installed on the upper end of the separating mechanism 4. A movable door 55 is hinged to the middle of the flap 51 and the base plate 53. Several partitions 56 are installed inside the movable door 55. The flap 51 is connected and fixed to the chemical spraying mechanism 6. Driven by the threaded shaft 3, it rotates above the separating mechanism 4, lifting the sewage on the first partition 41 upward and spraying it out in streams. When sprayed out, it is fully mixed with the chemical powder sprayed on the chemical spraying mechanism 6, which facilitates the full treatment of sewage.

[0025] The flap 51 is spiral-shaped, and the top of the flap 51 is installed on the agent spraying mechanism 6. The upper edge of the flap 51 has several semi-circular notches in the guide groove 52. When the spiral shape of the flap 51 rotates in the sewage, it carries the sewage obliquely upward and diverts it at the guide groove 52. After diversion, the downward impact can also make the sewage and the powder react more fully, which is convenient for sewage treatment.

[0026] The medicine dispensing mechanism 6 includes a medicine storage compartment 61. Both ends of the medicine storage compartment 61 are connected to mounting brackets 65. The bottom end of the mounting brackets 65 is fixedly connected to the stirring mechanism 5, and a roller 62 is rotatably connected to the bottom of the mounting brackets 65. The inner end of the roller 62 is connected to a second gear 63, which meshes with a first gear 32. The outer end of the roller 62 is connected to a third gear 64, which meshes with a gear ring 13. The rotatable connection between the medicine storage compartment 61 and the roller 62 prevents excessive spillage of the medicine powder in the medicine storage compartment 61, and the roller 62 removes a measured amount of medicine powder from the medicine storage compartment 61 as it rots.

[0027] A wastewater treatment method for heavy metal remediation, employing the aforementioned wastewater treatment device for heavy metal remediation, includes the following steps: S1. Wastewater containing heavy metals is discharged into the tank 11 through the inlet pipe 12. The separating mechanism 4 is located at the top of the treatment tank 1. The first motor 2 drives the threaded shaft 3 to rotate, causing the separating mechanism 4 to squeeze the wastewater in the tank 11 downwards. The wastewater is then squeezed through the corrugated pipe 47 to the top of the first partition 41, thus separating the wastewater into upper and lower layers. The upper end of the stirring mechanism 5 and the chemical spraying mechanism 6 are fixed at the same height as the top of the treatment tank 1, but the bottom end of the stirring mechanism 5 is connected to the separating mechanism 4. As the separating mechanism 4 rises and falls, the stirring mechanism 5 stretches up and down, and the movable door 55 and partition 56 also extend and unfold. After the separation, the second motor 33 drives the first gear 32 to rotate, causing the first gear 32 to mesh with the second gear 63. The first gear 32 drives the second gear 63 to rotate, causing the stirring mechanism 5 and the chemical spraying mechanism to... 6 rotates above the separating mechanism 4, scooping up the sewage on the separating mechanism 4 along the inclined surface of the flap 51, and causing the sewage to flow out in several streams on the guide channel 52. At the same time, due to the connection between the roller 62 and the second gear 63, the roller 62 rotates at the bottom of the medicine storage compartment 61, rolling out the medicine powder inside the medicine storage compartment 61 and evenly sprinkling it on the water flow. As the water flows downward, it mixes the medicine powder with the sewage. At the same time, under the action of the rotation of the stirring mechanism 5, the sewage is stirred, causing the heavy metal clumps in the sewage to separate. The first gear 32 reverses, causing the flap 51 and the bottom plate 53 to rotate in opposite directions, allowing the heavy metal crystals in the sewage to enter the middle of the flap 51 and the bottom plate 53 through the partition 56. The separated clean water enters the partition between the first partition 41 and the second partition 42 through the sieve hole 45, and is finally discharged in the outlet pipe 46. S2. After the internal sewage is treated, the first motor 2 continues to rotate, pulling the separation mechanism 4 and the stirring mechanism 5 down a bit more, so that the sewage in the tank 11 flows out to the top of the separation mechanism 4 again, and repeats the above steps to treat this part of the sewage until all the sewage is treated. S3. After the sewage in treatment tank 1 is completely treated, all the heavy metal clumps generated during the treatment are stored between the flap 51 and the bottom plate 53. Pull the movable door 55 and the partition 56 to one side to remove all the clumps.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. A wastewater treatment device for heavy metal remediation, comprising a treatment tank (1), characterized in that: A first motor (2) is fixedly mounted at the bottom end of the treatment pool (1); a threaded shaft (3) is mounted at the upper end of the first motor (2); a partition mechanism (4) is connected to the middle of the threaded shaft (3); a stirring mechanism (5) is connected to the upper end of the partition mechanism (4); a medicine spraying mechanism (6) is fixedly mounted at the upper end of the stirring mechanism (5); the medicine spraying mechanism (6) is rotatably connected to the treatment pool (1); a connecting frame (7) is mounted at the inner end of the medicine spraying mechanism (6); and the connecting frame (7) is sleeved on the threaded shaft (3).

2. A wastewater treatment device for heavy metal remediation according to claim 1, characterized in that: The treatment pool (1) comprises a pool body (11), the bottom of the pool body (11) is fixedly connected to a water inlet pipe (12), and the upper edge of the pool body (11) is provided with a gear ring (13).

3. A wastewater treatment device for heavy metal remediation according to claim 1, characterized in that: The threaded shaft (3) comprises a screw rod (31), the upper end of the screw rod (31) is connected to a first gear (32), a second motor (33) is mounted on the top end of the first gear rod (32), and the second motor (33) is fixedly mounted on the top end of the screw rod (31).

4. A wastewater treatment device for heavy metal remediation according to claim 1, characterized in that: The partition mechanism (4) comprises a first partition plate (41) and a second partition plate (42); a connecting sleeve (44) is connected to the middle of the first partition plate (41) and the second partition plate (42); the connecting sleeve (44) is threadedly connected to the threaded shaft (3); a connecting layer (43) is connected to the edge of the first partition plate (41); a water outlet pipe (46) is connected to the bottom of the second partition plate (42); a sieve hole (45) is provided in the middle of the first partition plate (41); a bellows (47) is connected to the middle of the first partition plate (41) and the second partition plate (42); a one-way plate (48) is installed at the upper end of the bellows (47).

5. A wastewater treatment device for heavy metal remediation according to claim 1, characterized in that: The stirring mechanism (5) comprises a flap (51), the bottom of the flap (51) is connected to a bottom plate (53), a slider (54) is installed at the bottom of the bottom plate (53), the slider (54) is slidably installed on the upper end of the partition mechanism (4), a movable door (55) is hinged in the middle of the flap (51) and the bottom plate (53), and a plurality of partition pages (56) are installed inside the movable door (55).

6. A wastewater treatment device for heavy metal remediation according to claim 5, characterized in that: The flap (51) is spiral-shaped, the top end of the flap (51) is mounted on the medicine spraying mechanism (6), and the upper edge of the flap (51) is provided with a plurality of guide grooves (52) with semicircular notches.

7. A wastewater treatment device for heavy metal remediation according to claim 2, characterized in that: The medicine spraying mechanism (6) comprises a medicine storage grid (61), both ends of the medicine storage grid (61) are connected to mounting frames (65), the bottom end of the mounting frame (65) is fixedly connected to the stirring mechanism (5), and the bottom of the mounting frame (65) is rollingly connected to a roller (62), the inner end of the roller (62) is connected to a second gear (63), the second gear (63) is meshingly mounted with the first gear (32), and the outer end of the roller (62) is connected to a third gear (64), and the third gear (64) is meshingly connected to the gear ring (13).

8. A wastewater treatment method for heavy metal remediation, characterized in that: A wastewater treatment device for heavy metal remediation according to any one of claims 1 to 7 comprises the following steps: S1. Wastewater containing heavy metals is discharged into the interior of the tank body (11) through the water inlet pipe (12). The partition mechanism (4) is located at the uppermost layer inside the treatment tank (1). The first motor (2) drives the threaded shaft (3) to rotate, so that the partition mechanism (4) presses the wastewater in the tank body (11) downward, so that the wastewater passes through the bellows (47) and is squeezed onto the top of the first partition plate (41), and the wastewater is divided into upper and lower layers. The upper end of the stirring mechanism (5) and the reagent throwing mechanism (6) are fixed to the treatment tank. (1) The top of the mixing mechanism (5) is flat, but the bottom of the mixing mechanism (5) is connected to the partition mechanism (4). As the partition mechanism (4) rises and falls, the mixing mechanism (5) stretches up and down, and the movable door (55) and the partition (56) are also stretched and unfolded. After the separation, the second motor (33) drives the first gear (32) to rotate, so that the first gear (32) and the second gear (63) are meshed, and the first gear (32) drives the second gear (63) to rotate, so that the mixing mechanism (5) and the medicine are The drug throwing mechanism (6) rotates above the partition mechanism (4), scoops up the sewage on the partition mechanism (4) along the inclined surface of the flap (51), and causes the sewage to flow out in several streams on the guide groove (52). At the same time, due to the connection between the roller (62) and the second gear (63), the roller (62) rotates at the bottom of the drug storage grid (61), rolls out the drug powder inside the drug storage grid (61), and evenly sprinkles it on the water flow. As the water flows downward, the drug powder is mixed with the sewage, and At the same time, the sewage is stirred under the action of the rotation of the stirring mechanism (5), so that the heavy metal agglomerates in the sewage are separated, and the first gear (32) is reversed, so that the flap (51) and the bottom plate (53) rotate in the opposite direction, and the heavy metal crystals in the sewage pass through the partition sheet (56) into the middle of the flap (51) and the bottom plate (53), and the separated clean water passes through the sieve hole (45) into the partition layer between the first partition plate (41) and the second partition plate (42), and is finally discharged in the outlet pipe (46); S2. When the sewage inside has been treated, the first motor (2) continues to rotate, pulling the partition mechanism (4) and the stirring mechanism (5) downward a little further, so that the sewage in the tank body (11) flows out again to the top of the partition mechanism (4), and repeats the above steps to treat this part of the sewage until all the sewage is treated; S3. After the sewage in the treatment tank (1) is completely treated, all the heavy metal agglomerates generated by the treatment are stored between the flap (51) and the bottom plate (53). The movable door (55) and the partition sheet (56) are pulled to one side to remove all the agglomerates.

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