Automatic separation process and device for heavy metal precipitation in wastewater treatment

Abstract

The present application relates to wastewater treatment equipment technical field, more particularly, to a kind of heavy metal precipitation automatic separation process and device in wastewater treatment, wherein device includes the sedimentation separation tank for containing wastewater, the sedimentation collection barrel for containing precipitate in wastewater is equipped in the sedimentation separation tank, the upper portion of the sedimentation collection barrel has opening, the push plate is equipped above the opening, the sedimentation collection barrel has separable barrel side wall and barrel bottom plate, the barrel side wall and the push plate are connected with separation drive mechanism, the separation drive mechanism can drive the barrel side wall and the push plate mutually close to push wastewater and precipitate along the gap between the barrel side wall and the barrel bottom plate and discharge, make precipitate fall in different area collection.Due to the parabolic shape of different density precipitate, so the horizontal distance of different density precipitate falling into bottom from sedimentation collection barrel is different, so that different heavy metal precipitate can be separated.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and more specifically, to an automatic separation process and apparatus for heavy metal precipitation in wastewater treatment. Background Technology

[0002] Arsenic is classified as a nonmetallic element in chemical classification, but due to its properties similar to heavy metals, it is often managed as a heavy metal, and arsenic and its ions are described as heavy metals in wastewater treatment. Based on the inventors' long-term research on heavy metal mines, antimony and arsenic belong to the same nitrogen group, have very similar chemical properties, and similar formation mechanisms. They often combine with sulfur to form symbiotic minerals; for example, antimony ore (such as stibnite Sb₂S₃) often coexists with arsenic sulfides (such as arsenopyrite FeAsS, realgar AsS, etc.). Mining and smelting processes easily generate heavy metal wastewater containing antimony and arsenic, requiring wastewater treatment to avoid serious damage to the ecological environment and biological health.

[0003] Currently, the most common methods for the resource recovery and utilization of heavy metal wastewater include lime or sulfide neutralization precipitation and coagulation sedimentation combined with adsorption. Neutralization precipitation involves adjusting the pH value of the wastewater so that heavy metal ions in the wastewater react with OH- ions. - or S 2- A water-insoluble precipitate is formed, which is then separated into solid and liquid phases to obtain the heavy metal precipitate. This precipitate is then reduced to obtain the remaining heavy metal substances. This method can rapidly precipitate heavy metal ions from wastewater; the process is simple and easy to operate. However, the precipitates formed by antimony and arsenic ions are mixed together, making subsequent recycling difficult. Multiple complex processes are required to separate them, increasing the cost of heavy metal resource recovery and hindering the widespread application of heavy metal ion resource recovery technology in wastewater. Summary of the Invention

[0004] To overcome the problems of complex and costly heavy metal precipitation and separation processes in wastewater treatment in the prior art, the first aspect of the present invention provides an automatic heavy metal precipitation and separation device for wastewater treatment.

[0005] A second aspect of the present invention provides an automatic separation process for heavy metal precipitation in wastewater treatment.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automatic separation device for heavy metal precipitation in wastewater treatment, comprising a precipitation separation tank for containing wastewater, a precipitation collection tank for containing precipitates in the wastewater, an opening at the top of the precipitation collection tank, a push plate above the opening, the precipitation collection tank having separable side walls and bottom plates, a separation driving mechanism connected to the side walls and the push plate, the separation driving mechanism being able to drive the side walls and the push plate to move closer to each other to push the precipitates out along the gap between the side walls and the bottom plates, so that the precipitates fall into different areas for collection.

[0007] In the technical solution of the present invention, the push plate is driven to move toward the sedimentation collection tank by the separation drive mechanism. At the same time, the push plate drives the separation between the side wall of the tank and the bottom plate of the tank to create a bottom gap. The push plate can push the wastewater to generate a thrust water flow to impact the sediment in the sedimentation collection tank, so that the sediment is discharged in a parabolic shape along the gap between the side wall of the tank and the bottom plate of the tank. Since the parabolic shape generated by sediments of different densities is different, the distance from the sedimentation collection tank after sediments of different weights fall to the bottom is different, thereby separating the sediment.

[0008] Furthermore, the separation drive mechanism includes a central shaft, a separation drive motor, a separation rotation assembly, a first separation assembly, and a second separation assembly. The central shaft is fixedly connected to the sedimentation separation tank. The separation rotation assembly is rotatably sleeved on the outside of the central shaft. The output end of the separation drive motor is drively connected to the separation rotation assembly. The separation rotation assembly is respectively provided with a first movable groove and a second movable groove. One end of the first separation assembly is movably connected to the first movable groove along its extension direction. The other end of the first separation assembly is fixedly connected to the side wall of the tank to drive the side wall of the tank to rise and fall. One end of the second separation assembly is movably connected to the second movable groove along its extension direction. The other end of the second separation assembly is fixedly connected to the push plate to drive the push plate to rise and fall. The bottom plate of the tank is fixedly connected to the central shaft. The first movable groove has a first rising groove section that causes the first separation assembly to rise along the rotation direction. The second movable groove has a second descending groove section that causes the second separation assembly to descend along the rotation direction.

[0009] In this solution, the separation drive motor drives the separation rotating assembly to rotate. The first rising groove section can drive the first separation assembly to rise, thereby driving the barrel side wall to rise. The second falling groove section can drive the second separation assembly to fall, thereby driving the push plate to fall. The barrel bottom plate and the central shaft are fixed. When the separation rotating assembly rotates, the first separation assembly and the second separation assembly can move synchronously in opposite directions, thereby driving the barrel side wall and the push plate to move closer or further apart.

[0010] Furthermore, the separation rotation assembly includes a separation shaft, a fixed rod, and a rotating ring. The separation shaft is a hollow structure and is coaxially rotated and sleeved on the outside of the central shaft. The rotating ring is coaxially fixed to the lower end of the separation shaft through the fixed rod. The first rising groove section and the second falling groove section are respectively formed on the inner and outer sidewalls of the rotating ring.

[0011] In this design, the rotating ring, the first rising groove section, and the second falling groove section are rotated by the rotating shaft sleeve on the central shaft. The first rising groove section and the second falling groove section are respectively set on the inner and outer side walls of the rotating ring, making the structure more compact.

[0012] Furthermore, the first movable groove also has a first planar groove segment formed on the inner sidewall of the rotating ring and a first descending groove segment that causes the first separating component to descend along the rotation direction. One end of the first planar groove segment is connected to the lower end of the first ascending groove segment, and the other end of the first planar groove segment is connected to the upper end of the first ascending groove segment through the first descending groove segment. The second movable groove also has a second planar groove segment formed on the outer sidewall of the rotating ring and a second ascending groove segment that causes the second separating component to rise along the rotation direction. One end of the second planar groove segment is connected to the upper end of the second descending groove segment, and the other end of the second planar groove segment is connected to the upper end of the second descending groove segment through the second ascending groove segment.

[0013] In this scheme, the first rising groove section, the first falling groove section, and the first planar groove section are connected end to end in a ring, and the second falling groove section, the second rising groove section, and the second planar groove section are connected end to end in a ring. This allows the separation rotating component to achieve two actions within one rotation cycle: the barrel sidewall and the push plate move closer and further away from each other. The separation drive motor only needs to drive the separation rotating component to rotate in one direction, and the two actions of approaching and separating can be performed intermittently to repeat the separation work.

[0014] Furthermore, the first separation assembly includes a first lifting ring, a first transmission rod, and a first lifting rod. The first lifting ring is axially movably sleeved on the central shaft. One end of the first transmission rod is fixedly connected to the first lifting ring, and the other end of the first transmission rod is movably connected to the first movable groove along the extension direction of the first movable groove. One end of the first lifting rod is fixedly connected to the first lifting ring, and the other end of the first lifting rod is fixedly connected to the side wall of the barrel.

[0015] In this design, the first movable groove drives the first transmission rod to rise and fall, and the first transmission rod then drives the first lifting rod to rise and fall through the first lifting ring, thereby driving the side wall of the barrel to rise and fall.

[0016] Furthermore, the second separation assembly includes a second lifting ring, a second transmission rod, and a second lifting rod. The second lifting ring is axially movably sleeved on the central shaft. One end of the second transmission rod is fixedly connected to the second lifting ring, and the other end of the second transmission rod is movably connected to the second movable groove along the extension direction of the second movable groove. One end of the second lifting rod is fixedly connected to the second lifting ring, and the other end of the second lifting rod is fixedly connected to the push plate.

[0017] In this design, the second movable groove drives the second transmission rod to rise and fall, and the second transmission rod then drives the second lifting rod to rise and fall through the second lifting ring, thereby driving the push plate to rise and fall.

[0018] Furthermore, the sedimentation separation tank is connected to a stirring and crushing assembly, which includes a stirring drive motor, a stirring shaft, stirring blades, and a flocculant comb. The fixed end of the stirring drive motor is fixedly connected to the sedimentation separation tank, the output end of the stirring drive motor is drivenly connected to the stirring shaft, multiple stirring blades are fixedly connected to the stirring shaft, and the flocculant comb is fixedly connected to the inner wall of the sedimentation separation tank.

[0019] In this solution, the mixing and crushing component can be used to crush flocculated sediments in wastewater, making the flocculated sediments smaller and looser, preventing the formation of large flocs, thus facilitating sediment separation. The mixing drive motor drives the mixing shaft to rotate, thereby driving the mixing blades to agitate the wastewater, promoting contact and collision between the flocculated sediments and the broken flocs, resulting in better crushing effect.

[0020] Furthermore, a baffle plate is fixedly connected to the bottom of the sedimentation separation tank. The baffle plate divides the interior of the sedimentation separation tank into a first tank body located above and a second tank body located below. The baffle plate is provided with a one-way valve that leads from the second tank body to the first tank body. The baffle plate has a barrel limiting hole for the barrel sidewall to pass through and move. The barrel bottom plate is disposed in the second tank body and located below the barrel limiting hole. The barrel sidewall does not leave the barrel limiting hole during the movement path.

[0021] In this scheme, the sediment in the first tank is collected in a sedimentation collection bucket. When the side wall of the bucket rises along the bucket limiting hole, the sediment can be discharged and separated in the second tank through the gap between the side wall and the bottom plate of the bucket under the action of the water flow thrust generated by the push plate. The one-way valve on the baffle plate allows the wastewater in the second tank to enter the first tank to maintain water pressure balance. The fact that the side wall of the bucket does not detach from the bucket limiting hole ensures that the sediment can only be discharged through the gap between the side wall and the bottom plate of the bucket, and will not be discharged through the gap after the baffle plate and the side wall of the bucket separate, thus improving the sediment separation effect.

[0022] Furthermore, the barrel sidewall has a first working position and a second working position at the two ends of the movement path. When the barrel sidewall is at the first working position, the separation drive mechanism is at the first stroke end point, and the upper end face of the barrel sidewall is flush with the barrier plate. When the barrel sidewall is at the second working position, the separation drive mechanism is at the second stroke end point, the lower end face of the barrel sidewall is flush with the barrier plate, and the push plate is flush with the upper end face of the barrel sidewall.

[0023] In this scheme, when the barrel sidewall is in the first working position, the barrel sidewall is at its lowest point but does not detach from the baffle plate, preventing the sediment from falling into the second tank through the gap between the baffle plate and the barrel sidewall, so as to facilitate the collection of sediment in the first tank; when the barrel sidewall is in the second working position, the barrel sidewall is at its highest point but does not detach from the baffle plate, preventing the sediment from falling into the second tank through the gap between the baffle plate and the barrel sidewall during sediment separation.

[0024] Furthermore, the bottom of the second pool is provided with a sedimentation collection plate, which has a first collection area close to the sedimentation collection bucket and a second collection area away from the sedimentation collection bucket in vertical projection. The first collection area is connected to a first sedimentation collection pipe, and the second collection area is connected to a second sedimentation collection pipe.

[0025] In this scheme, a first collection area is used to hold precipitates with lower density, which are then discharged through a first precipitate collection pipe for subsequent treatment. A second collection area is used to hold precipitates with higher density, which are then discharged through a second precipitate collection pipe for subsequent treatment.

[0026] The present invention discloses an automatic separation process for heavy metal precipitation in wastewater treatment, which is realized by an automatic separation device for heavy metal precipitation in wastewater treatment. The process includes: collecting precipitates in a sedimentation collection tank containing wastewater in a sedimentation separation tank; pushing water flow to impact the precipitates in the sedimentation collection tank, causing the precipitates to be thrown laterally along the gap at the bottom of the sedimentation collection tank; and separating the precipitates by utilizing the different landing points of precipitates of different weights after being thrown.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] I. The automatic heavy metal precipitation separation device for wastewater treatment of the present invention uses a separation drive mechanism to drive a pusher plate toward a precipitation collection tank. Simultaneously, it drives the tank's sidewall and bottom plate to separate, creating a bottom gap. The pusher plate pushes the wastewater to generate a thrusting water flow that impacts the precipitate in the collection tank. This causes the precipitate to be discharged in a parabolic trajectory along the gap between the tank's sidewall and bottom plate. Because precipitates of different densities produce different parabolic shapes, precipitates of different weights travel different distances from the bottom of the collection tank, thus separating the precipitates. This invention can automatically separate at least two heavy metal precipitates of different densities, reducing the investment cost of wastewater treatment compared to the complexity of existing separation methods.

[0029] II. The automatic separation device for heavy metal precipitation in wastewater treatment of the present invention, by designing the transmission structure of the separation rotating component, uses the separation drive motor to drive the side wall of the tank and the push plate to move closer or further away from each other. The separation rotating component can realize two actions of moving closer and further away from each other within one rotation cycle. The separation drive motor only needs to drive the separation rotating component to rotate in one direction, and the separation work can be repeated by intermittently performing the two actions of moving closer and separating.

[0030] Third, the automatic heavy metal precipitation separation device for wastewater treatment of the present invention, by setting a sedimentation collection plate at the bottom of the sedimentation separation tank to divide the collection areas of different precipitates, can collect the different precipitates after separation separately, which can ensure the collection efficiency of heavy metal precipitates, avoid heavy metal precipitates from sticking to the bottom for a long time and causing corrosion and damage, and improve the service life of the device.

[0031] IV. The automatic separation process for heavy metal precipitation in wastewater treatment of the present invention is realized by using an automatic separation device for heavy metal precipitation in wastewater treatment. By taking advantage of the different landing points of precipitates of different densities in the wastewater after being thrown out, the precipitates in the wastewater are separated, thereby reducing the cost of wastewater treatment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the automatic heavy metal precipitation separation process and device in wastewater treatment according to the present invention (the precipitation separation tank has been cut out).

[0033] Figure 2 yes Figure 1 Side view;

[0034] Figure 3 This is a schematic diagram of the partition plate structure from the lower side when the barrel sidewall is in a low position.

[0035] Figure 4 This is a schematic diagram of the upper view of the partition plate when the side wall of the barrel is in a high position (the rotating ring has been cut out).

[0036] Figure 5 yes Figure 4 Enlarged view of point A;

[0037] Figure 6 yes Figure 4 A diagram showing the view from behind;

[0038] Figure 7 yes Figure 6 Enlarged view of point B;

[0039] Figure 8 yes Figure 4 A schematic diagram of the lower side view (when the barrel sidewall is at a high position);

[0040] Figure 9 This is a schematic diagram of the barrier plate and sediment collection plate from the lower side when the side wall of the barrel is in a high position;

[0041] Figure 10 yes Figure 9 A top-view diagram (with the obstruction removed);

[0042] Figure 11 yes Figure 9 Another top-view diagram (with the sediment collection plate removed);

[0043] Figure 12 This is a schematic diagram of the upper structure of the separation drive mechanism (the stirring shaft, separation shaft, and central shaft have their lower ends cut off at different lengths).

[0044] Figure 13 This is a schematic diagram of the connection structure between the monitoring components and the sedimentation separation tank.

[0045] In the attached diagram: 001, sedimentation separation tank; 011, support plate; 012, crossbeam; 013, inlet pipe; 131, inlet valve; 014, reactant addition pipe; 141, reactant addition valve; 015, coagulant addition pipe; 151, coagulant addition valve; 016, first sedimentation collection pipe; 161, first sedimentation collection valve; 017, second sedimentation collection pipe; 171, second sedimentation collection valve; 002, sedimentation collection tank; 021, tank sidewall; 0 22. Barrel bottom plate; 003. Push plate; 004. Separation drive mechanism; 041. Central shaft; 041a. Inner bearing; 041b. Central extension rod; 042. Separation drive motor; 421. First driving gear; 422. First driven gear; 043. Separation rotating assembly; 431. Separation shaft; 431a. Outer bearing; 432. Fixed rod; 433. Rotating ring; 4331. First movable groove; 4331a. First rising groove section; 4331 b. First planar groove section; 4331c. First descending groove section; 4332. Second movable groove; 4332a. Second descending groove section; 4332b. Second planar groove section; 4332c. Second ascending groove section; 044. First separation assembly; 441. First lifting ring; 442. First transmission rod; 443. First lifting rod; 045. Second separation assembly; 451. Second lifting ring; 452. Second transmission rod; 453. Second lifting rod; 005. Mixing crusher Flocculent assembly; 051, stirring drive motor; 511, second driving gear; 512, second driven gear; 052, stirring shaft; 053, stirring blade; 054, flocculation comb; 006, baffle plate; 061, one-way valve; 062, barrel limiting hole; 007, sedimentation collection plate; 071, first collection area; 072, second collection area; 008, monitoring assembly; 081, monitoring tank; 082, monitoring plug; 083, monitoring pipe; 084, monitoring valve. Detailed Implementation

[0046] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0047] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0048] The technical solution of the present invention will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0049] Example 1

[0050] refer to Figures 1 to 12 This embodiment discloses an automatic heavy metal precipitation separation device for wastewater treatment, including a precipitation separation tank 001 for containing wastewater, a precipitation collection tank 002 for containing precipitates in the wastewater in the precipitation separation tank 001, an opening at the top of the precipitation collection tank 002, a push plate 003 above the opening, the precipitation collection tank 002 having a separable side wall 021 and a bottom plate 022, a separation drive mechanism 004 connected to the side wall 021 and the push plate 003, the separation drive mechanism 004 being able to drive the side wall 021 and the push plate 003 to move closer to each other to push the wastewater and precipitates out along the gap between the side wall 021 and the bottom plate 022, so that the precipitates fall into different areas for collection.

[0051] In this embodiment, the separation drive mechanism 004 drives the push plate 003 to move toward the sedimentation collection tank 002, and at the same time drives the separation between the side wall 021 of the tank and the bottom plate 022 of the tank to create a bottom gap. The push plate 003 can push the wastewater to generate a thrust water flow to impact the sediment in the sedimentation collection tank 002, so that the sediment is discharged in a parabolic shape along the gap between the side wall 021 of the tank and the bottom plate 022 of the tank. Since the parabolic shape generated by sediments of different densities is different, the distance of sediments of different weights from the sedimentation collection tank 002 after falling to the bottom is different, thereby separating the sediment.

[0052] In this embodiment, reference Figure 1The top two sides of the sedimentation separation tank 001 are connected to support plates 011 in the vertical direction. The upper end of the support plates 011 is fixedly connected to a crossbeam 012 that spans the sedimentation separation tank 001. The fixed end of the separation drive mechanism 004 is fixedly connected to the crossbeam 012 so that it can be set in the upper middle part of the sedimentation separation tank 001. The output end of the separation drive mechanism 004 extends downward into the sedimentation separation tank 001 and connects to the side wall 021 and the bottom plate 022 of the tank for driving.

[0053] refer to Figure 2 An inlet pipe 013, a reactant addition pipe 014, and a coagulant addition pipe 015 are connected to the side wall of the sedimentation separation tank 001. An inlet valve 131 is connected to the inlet pipe 013, a reactant addition valve 141 is connected to the reactant addition pipe 014, and a coagulant addition valve 151 is connected to the coagulant addition pipe 015. For example, in this embodiment, the wastewater contains arsenic ions (As...). 3+ ) and antimony ions (Sb 3+ The reactants include oxidants, alkaline agents, etc., which can be added sequentially according to the reaction order, with the coagulant added last. Under the action of the coagulant, the two heavy metal precipitates will precipitate in a flocculent state. Of course, in other embodiments, other different heavy metal ions can be used, which can form precipitates of different densities for separation. The reagents used are determined according to the reaction requirements of the corresponding heavy metal ions.

[0054] In this embodiment, both the sedimentation reaction and separation of wastewater can be carried out in the sedimentation separation tank 001. In other embodiments, wastewater containing heavy metal ions can also be reacted in other external equipment first, and then the wastewater and the generated heavy metal precipitates can be sent together to the sedimentation separation tank 001 for separation. The precipitates in the wastewater can be crushed, for example, by using a stirring and crushing component 005 to form finer and looser flocs, making subsequent separation easier and more precise.

[0055] refer to Figure 1 , Figure 4 and Figure 5The separation drive mechanism 004 includes a central shaft 041, a separation drive motor 042, a separation rotation assembly 043, a first separation assembly 044, and a second separation assembly 045. The central shaft 041 is fixedly connected to the sedimentation separation tank 001. The separation rotation assembly 043 is rotatably sleeved on the outside of the central shaft. The output end of the separation drive motor 042 is drively connected to the separation rotation assembly 043. The separation rotation assembly 043 is respectively provided with a first movable groove 4331 and a second movable groove 4332. One end of the first separation assembly 044 is movably connected to the first movable groove 4331 along the extension direction of the first movable groove 4331. The other end of 044 is fixedly connected to the side wall 021 of the bucket to drive the side wall 021 of the bucket to rise and fall. One end of the second separation component 045 is movably connected to the second movable groove 4332 along the extension direction of the second movable groove 4332. The other end of the second separation component 045 is fixedly connected to the push plate 003 to drive the push plate 003 to rise and fall. The bottom plate 022 of the bucket is fixedly connected to the central shaft 041. The first movable groove 4331 has a first rising groove section 4331a that causes the first separation component 044 to rise in the rotation direction. The second movable groove 4332 has a second falling groove section 4332a that causes the second separation component 045 to fall in the rotation direction.

[0056] In this embodiment, the separation drive motor 042 drives the separation rotation assembly 043 to rotate. The first rising groove section 4331a drives the first separation assembly 044 to rise, thereby driving the barrel side wall 021 to rise. The second descending groove section 4332a drives the second separation assembly 045 to descend, thereby driving the push plate 003 to descend. The barrel bottom plate 022 is fixed to the central shaft 041 by the central extension rod 041b. When the separation rotation assembly 043 rotates, the first separation assembly 044 and the second separation assembly 045 can move synchronously in opposite directions, thereby driving the barrel side wall 021 and the push plate 003 to move closer or further apart. In this embodiment, the separation drive motor 042 can be a stepper motor or a servo motor, thereby enabling precise control of the rotation angle of the separation rotation assembly 043.

[0057] refer to Figure 5 and Figure 6In this embodiment, the first rising groove segment 4331a and the second falling groove segment 4332a are positioned on the separation rotation assembly 043 relative to the central axis 041. Taking a top-down view as an example, the central axis 041 is at the center of rotation, and the separation rotation assembly 043 is arranged around the central axis 041. From a top-down view, when the first rising groove segment 4331a is above the central axis 041, the second falling groove segment 4332a is also above the central axis 041; when the first rising groove segment 4331a is below the central axis 041, the second falling groove segment 4332a is also below the central axis 041. The first rising groove segment 4331a and the second falling groove segment 4332a are on the same side of the separation rotation assembly 043 relative to the central axis 041. "Same side" refers to their position relative to the central axis 041, not the inner and outer surfaces of the separation rotation assembly 043.

[0058] In this embodiment, the first ascending groove segment 4331a is located on the inner side of the separating rotating assembly 043, and the second descending groove segment 4332a is located on the outer side of the separating rotating assembly 043. In other embodiments, the first ascending groove segment 4331a and the second descending groove segment 4332a may also be located simultaneously on the inner or outer side of the separating rotating assembly 043, and can be staggered in vertical height without causing motion interference.

[0059] refer to Figure 4 and Figure 8 The separation and rotation assembly 043 includes a separation shaft 431, a fixing rod 432, and a rotating ring 433. The separation shaft 431 is a hollow structure and is coaxially rotated and sleeved on the outside of the central shaft 041. The rotating ring 433 is coaxially fixedly connected to the lower end of the separation shaft 431 through the fixing rod 432. The first rising groove section 4331a and the second falling groove section 4332a are respectively opened on the inner side wall and the outer side wall of the rotating ring 433.

[0060] In this embodiment, by rotating the separate rotating shaft 431 on the central shaft 041, the rotating ring 433 and the first rising groove section 4331a and the second falling groove section 4332a are driven to rotate. The first rising groove section 4331a and the second falling groove section 4332a are respectively positioned on the inner and outer side walls of the rotating ring 433, making the structure more compact. More specifically, refer to... Figure 12The fixed end of the separation drive motor 042 is fixedly connected to the crossbeam 012. The output shaft of the separation drive motor 042 passes through the crossbeam 012 and is connected to the first driving gear 421. The upper end of the separation shaft 431 is coaxially fixedly connected to the first driven gear 422, and the first driving gear 421 and the first driven gear 422 mesh and transmit power. The separation shaft 431 and the central shaft 041 are rotatably connected through the inner bearing 041a. Three fixed rods 432 are provided along the circumference of the rotating ring 433, and the two ends of each fixed rod 432 are fixedly connected to the rotating ring 433 and the separation shaft 431, respectively.

[0061] refer to Figure 4 , Figure 6 and Figure 7 The first movable groove 4331 further includes a first planar groove segment 4331b formed on the inner sidewall of the rotating ring 433 and a first descending groove segment 4331c that causes the first separating component 044 to descend along the rotation direction. One end of the first planar groove segment 4331b is connected to the lower end of the first ascending groove segment 4331a, and the other end of the first planar groove segment 4331b is connected to the upper end of the first ascending groove segment 4331a through the first descending groove segment 4331c. The second movable groove 4332 further includes a second planar groove segment 4332b formed on the outer sidewall of the rotating ring 433 and a second ascending groove segment 4332c that causes the second separating component 045 to rise along the rotation direction. One end of the second planar groove segment 4332b is connected to the upper end of the second descending groove segment 4332a, and the other end of the second planar groove segment 4332b is connected to the upper end of the second descending groove segment 4332a through the second ascending groove segment 4332c.

[0062] In this embodiment, the first ascending groove segment 4331a, the first descending groove segment 4331c, and the first planar groove segment 4331b are connected end to end in a ring, and the second descending groove segment 4332a, the second ascending groove segment 4332c, and the second planar groove segment 4332b are connected end to end in a ring, so that the separation rotating component 043 can realize the two actions of the barrel side wall 021 and the push plate 003 moving closer and further away from each other in one rotation cycle. The separation drive motor 042 only needs to drive the separation rotating component 043 to rotate in one direction, and the two actions of approaching and separating can be performed intermittently to repeat the separation work.

[0063] For more specific details, please refer to Figure 4 and Figure 6The first ascending groove segment 4331a and the first descending groove segment 4331c smoothly transition to form a symmetrical arc-shaped groove. The first planar groove is set on the first plane and its two ends are connected to the two ends of the arc-shaped groove. The second descending groove segment 4332a, the second ascending groove segment 4332c, and the second planar groove segment 4332b are similar and will not be described in detail here. From the side projection, the arc-shaped groove formed by the first ascending groove segment 4331a and the first descending groove segment 4331c bulges upward, while the arc-shaped groove formed by the second descending groove segment 4332a and the second ascending groove segment 4332c bulges downward. From the top view, the separation drive motor 042 drives the separation rotating assembly 043 to rotate clockwise.

[0064] refer to Figure 5 The first separation component 044 includes a first lifting ring 441, a first transmission rod 442, and a first lifting rod 443. The first lifting ring 441 is axially movably sleeved on the central shaft 041. One end of the first transmission rod 442 is fixedly connected to the first lifting ring 441, and the other end of the first transmission rod 442 is movably connected to the first movable groove 4331 along the extension direction of the first movable groove 4331. One end of the first lifting rod 443 is fixedly connected to the first lifting ring 441, and the other end of the first lifting rod 443 is fixedly connected to the barrel side wall 021.

[0065] In this embodiment, the first movable groove 4331 drives the first transmission rod 442 to rise and fall, and the first transmission rod 442 then drives the first lifting rod 443 to rise and fall via the first lifting ring 441, thereby driving the barrel side wall 021 to move up and down. Specifically, refer to... Figure 5 A groove is vertically formed on the central shaft 041. The first lifting ring 441 is movably connected to the groove via a rolling bearing, thus achieving a movable sleeve relative to the central shaft 041. The length of the groove limits the vertical movement distance of the first lifting ring 441. The first lifting ring 441 can be composed of two ring bodies and three vertical connecting parts. The two ring bodies are parallel and spaced apart on the outside of the central shaft 041, and the two ring bodies are fixedly connected to each other via the connecting parts. One end of the first transmission rod 442 is fixedly connected to the first lifting ring 441, and the other end of the first transmission rod 442 can be connected to the first movable groove 4331 via a rolling bearing, which can roll along the first movable groove 4331.

[0066] refer to Figure 5The second separation component 045 includes a second lifting ring 451, a second transmission rod 452, and a second lifting rod 453. The second lifting ring 451 is axially movably sleeved on the central shaft 041. One end of the second transmission rod 452 is fixedly connected to the second lifting ring 451, and the other end of the second transmission rod 452 is movably connected to the second movable groove 4332 along the extension direction of the second movable groove 4332. One end of the second lifting rod 453 is fixedly connected to the second lifting ring 451, and the other end of the second lifting rod 453 is fixedly connected to the push plate 003.

[0067] In this embodiment, the second movable groove 4332 drives the second transmission rod 452 to rise and fall, and the second transmission rod 452 then drives the second lifting rod 453 to rise and fall via the second lifting ring 451, thereby driving the push plate 003 to move up and down. The second separation component 045 is similar to the first separation component 044; the size and shape of the second transmission rod 452 and the second lifting rod 453 can be set according to requirements, ensuring that there is no structural interference between the first separation component 044 and the second separation component 045.

[0068] refer to Figure 1 The sedimentation separation tank 001 is connected to a stirring and crushing assembly 005. The stirring and crushing assembly 005 includes a stirring drive motor 051, a stirring shaft 052, stirring blades 053, and a flocculation comb 054. The fixed end of the stirring drive motor 051 is fixedly connected to the sedimentation separation tank 001, and the output end of the stirring drive motor 051 is drivenly connected to the stirring shaft 052. The multiple stirring blades 053 are fixedly connected to the stirring shaft 052, and the flocculation comb 054 is fixedly connected to the inner wall of the sedimentation separation tank 001.

[0069] In this embodiment, the stirring and crushing component 005 can be used to crush flocculated sediments in wastewater, making the flocculated sediments finer and looser, preventing the formation of large flocs, thus facilitating sediment separation. The stirring drive motor 051 drives the stirring shaft 052 to rotate, thereby driving the stirring blades 053 to agitate the wastewater, promoting contact and collision between the flocculated sediments and the flocculants 054, resulting in better crushing effect. Four flocculants 054 are provided on the inner wall of the sedimentation separation tank 001. The flocculants 054 are composed of fine, dense strips. When the stirring blades 053 rotate, the rotating water flow carries the flocculated sediments through the flocculants 054. The fine flocculants 054 further crush the flocculated sediments, making them finer and looser, preventing the formation of large flocs, thus facilitating the subsequent separation of the two heavy metal precipitates. The stirring blades 053 on the stirring shaft 052 are arranged in two layers along the axial direction, with three blades arranged in each layer along the circumference, which can achieve a good stirring effect, promote the reaction to produce sediment, and promote the crushing of sediment.

[0070] refer to Figure 12 The fixed end of the stirring drive motor 051 is fixedly connected to the crossbeam 012. The output shaft of the stirring drive motor 051 passes through the crossbeam 012 and is connected to the second driving gear 511. The upper end of the stirring shaft 052 is coaxially fixedly connected to the second driven gear 512. The second driving gear 511 and the second driven gear 512 mesh with each other. The stirring shaft 052 has a hollow structure and is coaxially rotatably connected to the outside of the separation shaft 431 through the outer bearing 431a.

[0071] refer to Figure 1 and Figure 3 The bottom of the sedimentation separation tank 001 is fixedly connected to a baffle plate 006. The baffle plate 006 divides the interior of the sedimentation separation tank 001 into a first tank body located above and a second tank body located below. The baffle plate 006 is provided with a one-way valve 061 that leads from the second tank body to the first tank body. The baffle plate 006 has a barrel limiting hole 062 for the barrel side wall 021 to pass through and move. The barrel bottom plate 022 is disposed in the second tank body and located below the barrel limiting hole 062. The barrel side wall 021 does not leave the barrel limiting hole 062 during the movement path.

[0072] In this embodiment, the sediment in the first pool is collected in the sedimentation collection bucket 002. When the bucket side wall 021 rises along the bucket limiting hole 062, under the water flow thrust generated by the push plate 003, the sediment can be discharged and separated in the second pool through the gap between the bucket side wall 021 and the bucket bottom plate 022. The one-way valve 061 on the baffle plate 006 allows the wastewater in the second pool to enter the first pool to maintain water pressure balance. The fact that the bucket side wall 021 does not detach from the bucket limiting hole 062 ensures that the sediment can only be discharged through the gap between the bucket side wall 021 and the bucket bottom plate 022, and will not be discharged through the gap after the baffle plate 006 and the bucket side wall 021 separate, thereby improving the sediment separation effect.

[0073] The barrel sidewall 021 has a first working position and a second working position at both ends of the movement path. When the barrel sidewall 021 is in the first working position, the separation drive mechanism 004 is at the first stroke end point, and the upper end surface of the barrel sidewall 021 is flush with the barrier plate 006. When the barrel sidewall 021 is in the second working position, the separation drive mechanism 004 is at the second stroke end point, the lower end surface of the barrel sidewall 021 is flush with the barrier plate 006, and the push plate 003 is flush with the upper end surface of the barrel sidewall 021.

[0074] In this embodiment, when the barrel sidewall 021 is in the first working position, the barrel sidewall 021 is at its lowest point but does not detach from the baffle plate 006, preventing the sediment from falling into the second pool from the gap between the baffle plate 006 and the barrel sidewall 021, so as to facilitate the collection of sediment in the first pool; when the barrel sidewall 021 is in the second working position, the barrel sidewall 021 is at its highest point but does not detach from the baffle plate 006, preventing the sediment from falling into the second pool from the gap between the baffle plate 006 and the barrel sidewall 021 during sediment separation.

[0075] refer to Figure 10 The bottom of the second pool is provided with a sedimentation collection plate 007. The sedimentation collection plate 007 has a first collection area 071 that is close to the sedimentation collection tank 002 and a second collection area 072 that is far away from the sedimentation collection tank 002 in vertical projection. The first collection area 071 is connected to a first sedimentation collection pipe 016, and the second collection area 072 is connected to a second sedimentation collection pipe 017.

[0076] In this embodiment, the first collection area 071 contains the precipitate with a smaller weight, and then discharges it through the first precipitate collection pipe 016 for subsequent processing. The second collection area 072 contains the precipitate with a larger weight, and then discharges it through the second precipitate collection pipe 017 for subsequent processing.

[0077] For more specific details, please refer to Figure 9 and Figure 10 The first collection area 071 is a funnel shape with a central depression. The first sedimentation collection tube 016 is located at the bottom of the funnel shape, thereby effectively collecting heavy metal precipitates within the first collection area 071. The second collection area 072 is a ring shape surrounding the first collection area 071. Multiple annular fan-shaped areas are arranged outside the first collection area 071, with height differences between adjacent fan-shaped areas, forming an annular fan-shaped stepped distribution, highest on the left and decreasing sequentially to the right. The second sedimentation collection tube 017 is located at the bottom of the lowest fan-shaped area, thereby effectively collecting heavy metal precipitates within the second collection area 072. A first sedimentation collection valve 161 is connected to the first sedimentation collection tube 016, and a second sedimentation collection valve 171 is connected to the second sedimentation collection tube 017.

[0078] Example 2

[0079] refer to Figure 1 as well as Figure 13This embodiment is similar to Embodiment 1, except that a monitoring component 008 is also connected to the sedimentation separation tank 001. The monitoring component 008 includes a monitoring tank 081, a monitoring plug 082, a monitoring pipe 083, and a monitoring valve 084. The monitoring tank 081 is fixedly connected to the side wall of the sedimentation separation tank 001 via the monitoring plug 082. The monitoring pipe 083 communicates with the interior of the sedimentation separation tank 001. The monitoring valve 084 is located on the monitoring pipe 083, and the outlet of the monitoring pipe 083 is located above the monitoring tank 081. Opening the monitoring valve 084 allows wastewater from the sedimentation separation tank 001 to be drawn into the monitoring tank 081 for sampling and testing to determine the concentration of heavy metal ions in the sedimentation separation tank 001 and ensure sufficient sedimentation.

[0080] Example 3

[0081] This embodiment discloses an automatic separation process for heavy metal precipitation in wastewater treatment, referring to... Figures 1 to 13 The method utilizes the automatic heavy metal precipitation separation device in wastewater treatment according to Example 1 or Example 2, including the following steps: In a sedimentation separation tank 001 containing wastewater, the precipitate is collected in a sedimentation collection tank 002 in the sedimentation separation tank 001, and the water flow is pushed to impact the precipitate in the sedimentation collection tank, causing the precipitate to be thrown out laterally along the gap at the bottom of the sedimentation collection tank. The precipitate is separated by utilizing the different landing points of heavy metal precipitates of different densities after being thrown out.

[0082] The process steps of this embodiment will be described in more detail, taking into account the automatic separation device for heavy metal precipitation in wastewater treatment. First, arsenic-containing (As) ions are introduced into the sedimentation separation tank 001 through the inlet pipe 013. 3+ ) and antimony ions (Sb 3+ The heavy metal wastewater was treated by adding hydrogen peroxide to the sedimentation and separation tank through a reactant addition pipe, which removed the As... 3+ Sb 3+ Oxidized to a less toxic pentavalent form (As). 5+ Sb 5+The reaction involves adding alkaline substances such as sodium hydroxide, calcium oxide, or calcium hydroxide to generate calcium arsenate (Ca3(AsO4)2) and antimony hydroxide (Sb(OH)5). A coagulant is then added to the sedimentation separation tank to promote precipitation. Since the relative molecular mass of calcium arsenate is 398.08 and that of antimony hydroxide is 152.758, the density of the resulting calcium arsenate flocculent precipitate is greater than that of antimony hydroxide, allowing for separation using this process. The reaction can be accelerated by stirring the wastewater. Because a baffle plate 006 is installed in the sedimentation separation tank 001, and an open sedimentation collection tank 002 is located in the middle of the baffle plate 006, most of the two heavy metal precipitates are collected in the sedimentation collection tank 002 under the swirling effect generated by stirring. Then, the separation drive mechanism 004 drives the side wall 021 of the tank to move upward, while the push plate 003 moves downward. At this time, the push plate 003 generates a thrusting water flow towards the sediment collection tank. After the side wall 021 rises, an annular gap is created between it and the bottom plate 022 of the tank. The thrusting water flow causes the sediment to be discharged laterally along the annular gap, landing on the sediment collection plate 007 in a parabolic motion. The denser calcium arsenate precipitate falls into the first collection area 071, while the lighter antimony hydroxide precipitate falls into the second collection area 072, thus achieving the separation and collection of the two precipitates.

[0083] According to laboratory-scale studies, when the pusher plate 003 moves downward at a speed of 10 m / s, the radius of the bottom plate 022 is 0.5 m, the height of the side wall 021 is 0.35 m, the drop between the bottom plate 022 and the upper edge of the first collection area 071 is 1.6 m, the radius of the first collection area 071 is 1.6 m, and the ring width of the second collection area 072 is 3.3 m, the first collection area 071 of this device can collect more than 96% of calcium arsenate, and the second collection area 072 can collect more than 96% of antimony hydroxide.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An automatic heavy metal precipitation and separation device for wastewater treatment, characterized in that: The system includes a sedimentation separation tank (001) for containing wastewater, wherein the sedimentation separation tank (001) is provided with a sedimentation collection tank (002) for containing sediment in the wastewater, the sedimentation collection tank (002) has an opening at the top, and a push plate (003) is provided above the opening. The sedimentation collection tank (002) has separable side walls (021) and bottom plates (022). The side walls (021) and the push plate (003) are connected to a separation drive mechanism (004), which can drive the side walls (021) and the push plate (003) to move closer to each other to push the sediment out through the gap between the side walls (021) and the bottom plates (022). The separation drive mechanism (004) includes a central shaft (041), a separation drive motor (042), a separation rotation assembly (043), a first separation assembly (044), and a second separation assembly (045). The central shaft (041) is fixedly connected to the sedimentation separation tank (001). The separation rotation assembly (043) is rotatably sleeved on the outside of the central shaft (041). The output end of the separation drive motor (042) is drively connected to the separation rotation assembly (043). The separation rotation assembly (043) is respectively provided with a first movable groove (4331) and a second movable groove (4332). One end of the first separation assembly (044) is movably connected to the first movable groove (4331) along the extension direction of the first movable groove (4331). The other end of component (044) is fixedly connected to the side wall (021) of the bucket to drive the side wall (021) of the bucket to rise and fall. One end of the second separation component (045) is movably connected to the second movable groove (4332) along the extension direction of the second movable groove (4332). The other end of the second separation component (045) is fixedly connected to the push plate (003) to drive the push plate (003) to rise and fall. The bottom plate (022) of the bucket is fixedly connected to the central shaft (041). The first movable groove (4331) has a first rising groove section (4331a) that causes the first separation component (044) to rise along the rotation direction. The second movable groove (4332) has a second falling groove section (4332a) that causes the second separation component (045) to fall along the rotation direction. The separation and rotation assembly (043) includes a separation shaft (431), a fixing rod (432), and a rotating ring (433). The separation shaft (431) is a hollow structure and is coaxially rotated and sleeved on the outside of the central shaft (041). The rotating ring (433) is coaxially fixedly connected to the lower end of the separation shaft (431) through the fixing rod (432). The first rising groove section (4331a) and the second falling groove section (4332a) are respectively opened on the inner side wall and the outer side wall of the rotating ring (433). A baffle plate (006) is fixedly connected to the bottom of the sedimentation separation tank (001). The baffle plate (006) divides the interior of the sedimentation separation tank (001) into a first tank body located above and a second tank body located below. A one-way valve (061) is provided on the baffle plate (006) leading from the second tank body to the first tank body. The baffle plate (006) has a barrel limiting hole (062) through which the barrel side wall (021) moves. The barrel bottom plate (022) is located in the second tank body and below the barrel limiting hole (062). The barrel side wall (021) does not detach from the barrel limiting hole (062) during its movement path.

2. The automatic heavy metal precipitation and separation device for wastewater treatment according to claim 1, characterized in that: The first movable groove (4331) further comprises a first planar groove segment (4331b) formed on the inner wall of the rotating ring (433) and a first descending groove segment (4331c) that causes the first separating assembly (044) to descend along the rotation direction. One end of the first planar groove segment (4331b) is connected to the lower end of the first rising groove segment (4331a), and the other end of the first planar groove segment (4331b) is connected to the upper end of the first rising groove segment (4331a) through the first descending groove segment (4331c). The second movable groove (4332) also has a second planar groove segment (4332b) formed on the outer wall of the rotating ring (433) and a second rising groove segment (4332c) that raises the second separation component (045) in the rotation direction. One end of the second planar groove segment (4332b) is connected to the upper end of the second falling groove segment (4332a), and the other end of the second planar groove segment (4332b) is connected to the upper end of the second falling groove segment (4332a) through the second rising groove segment (4332c).

3. The automatic heavy metal precipitation and separation device for wastewater treatment according to claim 1, characterized in that: The first separation assembly (044) includes a first lifting ring (441), a first transmission rod (442), and a first lifting rod (443). The first lifting ring (441) is axially movably sleeved on the central shaft (041). One end of the first transmission rod (442) is fixedly connected to the first lifting ring (441), and the other end of the first transmission rod (442) is movably connected to the first movable groove (4331) along the extension direction of the first movable groove (4331). One end of the first lifting rod (443) is fixedly connected to the first lifting ring (441), and the other end of the first lifting rod (443) is fixedly connected to the barrel sidewall (021). / Or the second separation component (045) includes a second lifting ring (451), a second transmission rod (452) and a second lifting rod (453). The second lifting ring (451) is axially movably sleeved on the central shaft (041). One end of the second transmission rod (452) is fixedly connected to the second lifting ring (451), and the other end of the second transmission rod (452) is movably connected to the second movable groove (4332) along the extension direction of the second movable groove (4332). One end of the second lifting rod (453) is fixedly connected to the second lifting ring (451), and the other end of the second lifting rod (453) is fixedly connected to the push plate (003).

4. The automatic heavy metal precipitation and separation device for wastewater treatment according to claim 1, characterized in that: The sedimentation separation tank (001) is connected to a stirring and crushing assembly (005). The stirring and crushing assembly (005) includes a stirring drive motor (051), a stirring shaft (052), stirring blades (053), and a flocculation comb (054). The fixed end of the stirring drive motor (051) is fixedly connected to the sedimentation separation tank (001), and the output end of the stirring drive motor (051) is drivenly connected to the stirring shaft (052). Multiple stirring blades (053) are fixedly connected to the stirring shaft (052), and the flocculation comb (054) is fixedly connected to the inner wall of the sedimentation separation tank (001).

5. The automatic heavy metal precipitation and separation device for wastewater treatment according to claim 1, characterized in that: The barrel sidewall (021) has a first working position and a second working position at both ends of the moving path. When the barrel sidewall (021) is in the first working position, the separation drive mechanism (004) is at the first stroke end point, and the upper end face of the barrel sidewall (021) is flush with the barrier plate (006). When the barrel sidewall (021) is in the second working position, the separation drive mechanism (004) is at the second stroke end point, the lower end face of the barrel sidewall (021) is flush with the barrier plate (006), and the push plate (003) is flush with the upper end face of the barrel sidewall (021).

6. The automatic heavy metal precipitation and separation device for wastewater treatment according to claim 1, characterized in that: The bottom of the second pool is provided with a sedimentation collection plate (007). The sedimentation collection plate (007) has a first collection area (071) that is close to the sedimentation collection tank (002) in vertical projection and a second collection area (072) that is far away from the sedimentation collection tank (002). The first collection area (071) is connected to a first sedimentation collection pipe (016), and the second collection area (072) is connected to a second sedimentation collection pipe (017).

7. An automatic separation process for heavy metal precipitation in wastewater treatment, implemented using the apparatus described in any one of claims 1 to 6, characterized in that: The steps include: in a sedimentation separation tank (001) containing wastewater, collecting sediment in a sedimentation collection bucket (002) in the sedimentation separation tank (001), pushing water flow to impact the sediment in the sedimentation collection bucket (002), causing the sediment to be thrown horizontally along the gap at the bottom of the sedimentation collection bucket (002), and separating the sediment by utilizing the different landing points of sediments of different densities after being thrown.

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