A wastewater treatment system for phosphorus recovery from tailings

Abstract

The application discloses the technical field of tailing phosphorus extraction wastewater treatment and relates to a wastewater treatment system for tailing phosphorus extraction, which comprises an inclined plate thickening box, a first water inlet and a water outlet pipe arranged on the inclined plate thickening box, and further comprises: a mounting head arranged above the inclined plate thickening box and provided with a cylindrical through groove penetrating through the top and bottom ends thereof; a discharging head coaxially arranged with the through groove and rotationally connected with the mounting head; a first material groove is formed in the discharging head; a feeding pipe is fixedly installed at the top of the mounting head and communicates with the through groove; the feeding pipe is used for conveying a flocculating agent into the discharging head; a measuring cylinder is fixedly installed in the through groove and located directly below the discharging head; a second material groove that can communicate with the first material groove is formed in the measuring cylinder; a baffle is hingedly connected with the mounting head and used for shielding the second material groove; and a dissolving box is arranged below the mounting head.

Description

Technical Field

[0001] This invention relates to the field of tailings phosphorus extraction wastewater treatment technology, specifically a wastewater treatment system for tailings phosphorus extraction. Background Technology

[0002] Phosphorus extraction wastewater from tailings mainly originates from various stages of the phosphate ore beneficiation process. It is typically characterized by high phosphorus content, high suspended solids, high chemical oxygen demand (COD), and the presence of various heavy metals. Therefore, effective treatment measures are required to remove harmful substances from the wastewater.

[0003] In the treatment of tailings phosphate extraction wastewater, inclined plate thickeners can be used to remove suspended solids and particulate matter from the wastewater, reducing its turbidity and suspended solids content. Currently, flocculants are typically added before the wastewater enters the inclined plate thickener to facilitate faster concentration and separation of suspended solids and particulate matter. Because tailings wastewater contains a large amount of suspended solids, which often carry a negative charge, they remain dispersed in the water. Polyacrylamide (PAM) flocculants can effectively capture and adsorb suspended matter into coarse particles through mechanisms such as adsorption bridging, entrapment, and charge neutralization of their long molecular chains. These larger particles, due to their higher molecular weight and lower charge content, are more effectively separated from the suspended solids and particulate matter in the water. Larger particles settle quickly in water, thus separating suspended solids from water. However, polyacrylamide (PAM), due to its long molecular chain, may be difficult to disperse and function quickly when directly added to water. Therefore, it usually needs to be diluted to a certain concentration before use to achieve the best wastewater treatment effect. However, the dissolution and dilution of polyacrylamide (PAM) flocculants is usually done manually, making it difficult to accurately control the concentration of the polyacrylamide (PAM) flocculant solution. This results in the polyacrylamide (PAM) flocculant failing to perform at its best and greatly reducing the separation of suspended solids and particulate matter in wastewater.

[0004] Based on this, the present invention designs a wastewater treatment system for phosphorus extraction from tailings to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater treatment system for phosphorus extraction from tailings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment system for phosphorus extraction from tailings, comprising an inclined plate thickener and a first inlet and an outlet pipe disposed on the inclined plate thickener, further comprising: an installation head disposed above the inclined plate thickener and having a cylindrical through-slot extending through its top and bottom ends; a discharge head coaxially arranged with the through-slot and rotatably connected to the installation head; the discharge head having a first material trough; a feed pipe fixedly installed on the top of the installation head and communicating with the through-slot; the feed pipe being used to convey flocculant into the discharge head; and a measuring cylinder. The measuring cylinder is fixedly installed in the channel and located directly below the discharge head; a second material trough is provided on the measuring cylinder, which can communicate with the first material trough; a baffle is hinged to the mounting head and is used to cover the second material trough; a dissolving tank is located below the mounting head; a first drive unit is used to drive the discharge head to rotate, so that the first material trough and the second material trough are intermittently connected, and flocculant is delivered into the measuring cylinder; a second drive unit is used to drive the baffle to open when the first material trough and the second material trough are misaligned, so that the flocculant in the measuring cylinder falls into the dissolving tank; a control unit is used to control the inlet and outlet water of the dissolving tank.

[0007] As a further embodiment of the present invention, the first driving unit includes: a first gear, coaxially arranged with and fixedly connected to the unloading head; a first incomplete gear, rotatably connected to the mounting head and capable of meshing with the first gear; a first sprocket, fixedly mounted on the rotating shaft of the first incomplete gear and connected to a second sprocket via a chain drive; and a motor for driving the second sprocket to rotate.

[0008] As a further embodiment of the present invention, the second driving unit includes: an elastic element, one end of which is connected to a baffle and the other end of which is connected to a mounting head; the elastic element is used for resetting the baffle and for ensuring that the baffle is tightly fitted to the bottom surface of the unloading head when closed; a first bevel gear, fixedly mounted on the rotating shaft of the first incomplete gear; a second bevel gear, meshing with the first bevel gear and rotatably connected to the mounting head; a first rotating shaft, coaxially arranged with the second bevel gear and elastically slidingly connected to the rotating shaft of the second bevel gear along the axial direction; a second incomplete gear, fixedly connected to the first rotating shaft; and a first push block, disposed near the mounting head on the first rotating shaft. One side of the head; a wedge-shaped push rod, which is slidably connected to the mounting head in the vertical direction and the wedge-shaped surface is located directly above the first push block; an arc-shaped push rod, which is fixedly installed on the outer wall of the unloading head, and the end of the arc-shaped push rod is provided with an inclined surface; during the rotation of the unloading head, the arc-shaped push rod can drive the wedge-shaped push rod to move downward through the inclined surface, thereby driving the first push block to push the first rotating axis to move closer to the second bevel gear; a first rack, which is slidably connected to the mounting head in the vertical direction and can mesh with the second incomplete gear; a top block, which is fixedly connected to the baffle and has a receiving groove on the top that is clearance-fitted with the bottom end of the first rack.

[0009] As a further embodiment of the present invention, the control unit includes: an inlet pipe, installed on the side wall of the dissolving tank; a second inlet is provided inside the inlet pipe, the diameter of the second inlet being smaller than the diameter of the inlet pipe; a first inlet valve, installed inside the inlet pipe and used to control the opening and closing of the second inlet; a pin, slidably connected to the inlet pipe; a float, disposed inside the dissolving tank and fixedly connected to a rotating arm; the end of the rotating arm away from the float is hinged to the dissolving tank via a pin; a push rod, installed on the rotating arm; when the float rises and drives the rotating arm to rotate upward, it can drive the pin through the push rod to apply pressure to the first inlet valve to close the second inlet; a drain pipe, one end of which is fixedly installed at the bottom of the dissolving tank, and the other end of which is connected to the first inlet; a frame, fixedly installed at the bottom of the dissolving tank; a drain valve, slidably connected to the frame in the vertical direction; a second rack, slidably connected to the mounting head in the vertical direction, and disposed at the end of the first rack away from the mounting head. The device consists of a second rack and a third traction rope, one end of which is fixedly connected to the second rack and the other end of which is fixedly connected to the top of the drain valve; a wedge-shaped limiting block, which is elastically slidably connected to the drain valve in the horizontal direction and is used to limit the drain valve after it is opened; a second push block, which is fixedly connected to the rotating arm; a pressure rod, which is slidably connected to the drain valve in the vertical direction and is located at the bottom of the rotation path of the second push block; the pressure rod is connected to the wedge-shaped limiting block through the second traction rope; when the second push block drives the pressure rod to move downward, the wedge-shaped limiting block moves into the drain valve under the action of the second traction rope; a second water inlet valve, which is slidably connected to the dissolving tank in the vertical direction and is used to seal the end of the water inlet pipe located inside the dissolving tank; a connecting rod is hinged to the bottom of the second water inlet valve, and a first slider is hinged to the bottom of the connecting rod and is horizontally slidably connected to the dissolving tank; and a third traction rope, one end of which is fixedly connected to the first slider and the other end of which is fixedly connected to the drain valve.

[0010] As a further embodiment of the present invention, the bottom end of the drain valve, the first inlet valve, and the second inlet valve are all made of rubber material.

[0011] As a further embodiment of the present invention, the float is a rubber sphere.

[0012] As a further embodiment of the present invention, the measuring cylinder comprises a cylinder body and a rotating stop block; the cylinder body is fixedly connected to the mounting head, and a slot for receiving the rotating stop block is provided on the cylinder body; the rotating stop block is coaxially arranged with the cylinder body and rotatably connected to the cylinder body; the rotating stop block is used to control the volume of the second material tank; the water inlet pipe is slidably connected to the dissolving tank in the horizontal direction; a driving mechanism is provided on the side of the mounting head, and the driving mechanism is used to control the rotation of the rotating stop block and the sliding of the water inlet pipe according to the water pressure of the water outlet pipe.

[0013] As a further embodiment of the present invention, the driving mechanism includes a first hydraulic cylinder, a second hydraulic cylinder, and a turbine flow meter; the fixed end of the first hydraulic cylinder is fixedly connected to the mounting head, and the output end is fixedly connected to the rotating stop block; the fixed end of the second hydraulic cylinder is fixedly connected to the dissolving tank, and the output end is fixedly connected to the inlet pipe; the turbine flow meter is installed on the outlet pipe and is used to measure the water pressure in the outlet pipe, and to control the extension and retraction of the first hydraulic cylinder and the second hydraulic cylinder according to the water pressure in the outlet pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention, through the configuration of an installation head, a feeding head, a first material trough, a measuring cylinder, a second material trough, and a first driving unit, ensures that when the first driving unit drives the feeding head to rotate, the first and second material troughs are intermittently connected. The second material trough is intermittently filled with flocculant, and the amount of flocculant remains stable. Subsequently, when mixed with the solvent in the dissolving tank, the concentration of the solution is more precise, allowing the polyacrylamide (PAM) flocculant to exert its optimal effect. This enables the suspended solids and particulate matter to be concentrated and separated more quickly after the flocculant solution is mixed with wastewater and enters the inclined plate thickener. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a cross-sectional schematic diagram of the mounting head, feeding head, and measuring cylinder structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the first driving unit of the present invention;

[0019] Figure 4 This is a schematic diagram of the second driving unit structure of the present invention;

[0020] Figure 5 This is a cross-sectional schematic diagram of the second bevel gear and its related structures according to the present invention;

[0021] Figure 6 This is a schematic diagram of the first rack and top block structure of the present invention;

[0022] Figure 7 This is a cross-sectional view of the control unit structure of the present invention;

[0023] Figure 8 for Figure 7 Enlarged view of a portion of point A in the middle;

[0024] Figure 9 This is a schematic diagram showing the positional relationship between the second incomplete gear, the first rack, and the second rack of the present invention.

[0025] Figure 10This is a cross-sectional schematic diagram of the drain valve and its internal structure according to the present invention;

[0026] Figure 11 This is a schematic diagram illustrating the working principle of the control unit of the present invention;

[0027] Figure 12 This is a cross-sectional schematic diagram of the cylinder and rotating stop block structure of the present invention;

[0028] Figure 13 This is a schematic diagram illustrating the working principle of the rotating stop block of the present invention.

[0029] The components represented by the numbers in the attached diagram are as follows:

[0030] 1- Inclined plate thickening tank; 2- First water inlet; 3- Water outlet pipe; 4- Mounting head; 5- Discharge head; 6- First material trough; 7- Feed pipe; 8- Measuring cylinder; 9- Second material trough; 10- Baffle; 11- Dissolving tank; 12- First gear; 13- First incomplete gear; 14- First sprocket; 15- Chain; 16- Second sprocket; 17- Motor; 18- Elastic element; 19- First bevel gear; 20- Second bevel gear; 21- Second incomplete gear; 22- First rack; 23- Top block; 24- Receiving trough; 25- Water inlet pipe; 26- Second water inlet; 27- First water inlet. Valve, 28-Pin, 29-Float, 30-Rotating arm; 31-Push rod, 32-Drain pipe, 33-Frame, 34-Drain valve, 35-Second rack, 36-First traction rope, 37-Wedge-shaped limit block, 38-Second push block, 39-Pressure rod, 40-Second traction rope, 41-Second inlet valve, 42-Connecting rod, 43-First slider; 44-Third traction rope, 45-Cylinder, 46-Rotating stop, 47-First hydraulic cylinder, 48-Second hydraulic cylinder, 49-Turbine flow meter; 50-Wedge-shaped push rod, 51-Arc-shaped push rod, 52-First rotating shaft, 53-First push block. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-13This invention provides a technical solution: a wastewater treatment system for phosphorus extraction from tailings, comprising an inclined plate thickener 1, a first inlet 2 and an outlet pipe 3 disposed on the inclined plate thickener 1, and further comprising an installation head 4, a discharge head 5, a feed pipe 7, a measuring cylinder 8, a baffle 10, a dissolving tank 11, a first drive unit, a second drive unit, and a control unit; the installation head 4 is disposed above the inclined plate thickener 1 and has a cylindrical through-slot penetrating its top and bottom ends; the discharge head 5 is coaxially arranged with the through-slot and rotatably connected to the installation head 4; a first material trough 6 is provided on the discharge head 5; the feed pipe 7 is fixedly installed on the top of the installation head 4 and communicates with the through-slot; the feed pipe 7 is used for... Flocculant is fed into the feed head 5; the measuring cylinder 8 is fixedly installed in the through groove and located directly below the feed head 5; the measuring cylinder 8 has a second material trough 9 that can communicate with the first material trough 6; the baffle 10 is hinged to the mounting head 4 and is used to block the second material trough 9; the dissolving tank 11 is located below the mounting head 4; the first drive unit is used to drive the feed head 5 to rotate, so that the first material trough 6 and the second material trough 9 are intermittently connected, and flocculant is fed into the measuring cylinder 8; the second drive unit is used to drive the baffle 10 to open when the first material trough 6 and the second material trough 9 are misaligned, so that the flocculant in the measuring cylinder 8 falls into the dissolving tank 11; the control unit is used to control the inlet and outlet of the dissolving tank 11.

[0033] Before the wastewater is introduced into the first inlet 2, a flocculant solution needs to be prepared; the specific process is as follows: Figure 2 and Figure 3As shown, when the first drive unit drives the discharge head 5 to rotate, connecting the first material tank 6 and the second material tank 9, the flocculant enters the second material tank 9 from the feed pipe 7 through the first material tank 6. When the first drive unit drives the discharge head 5 to rotate, displacing the first material tank 6 and the second material tank 9, the weight of the flocculant in the second material tank 9 remains stable. Then, the second drive unit drives the baffle 10 to rotate downwards, opening the bottom of the second material tank 9, and the flocculant falls into the dissolving tank 11 below to mix and dissolve with the solvent. It should be noted that polyacrylamide (PAM) flocculant comes in powder and granular forms. Granular PAM dissolves relatively slowly, but the resulting solution is more uniform and less prone to clumping, exhibiting better dispersibility and uniform distribution in wastewater, thus improving the flocculation effect. Powdered PAM dissolves faster, but is prone to clumping during dissolution. Therefore, when using powdered PAM, stirring blades need to be installed in the dissolving tank 11 to stir the solution. When using granular PAM, the first drive unit connects the first material tank 6 and the second material tank 9. The interval needs to be longer to allow time for the granular PAM to dissolve; before the first drive unit drives the discharge head 5 to rotate and reconnect the first material tank 6 and the second material tank 9, the control unit discharges the solution in the dissolving tank 11 into the first water inlet 2 to mix with the wastewater, and injects a certain amount of solvent into the dissolving tank 11 after the solution is discharged; then, after the wastewater enters the inclined plate thickening tank 1, the flocculated suspended solids and particulate matter in the wastewater are intercepted by the inclined plate assembly, and the purified water flows out from the outlet pipe 3; this invention uses the installation head 4, the discharge head 5, and the first The arrangement of the material tank 6, measuring cylinder 8, second material tank 9, and first drive unit ensures that when the first drive unit drives the material head 5 to rotate, the first material tank 6 and the second material tank 9 are intermittently connected. The second material tank 9 is intermittently filled with flocculant, and the amount of flocculant remains stable. When it is subsequently mixed with the solvent in the dissolving tank 11, the concentration of the solution is more precise, allowing the polyacrylamide (PAM) flocculant to exert its best effect, so that the suspended solids and particulate matter are concentrated and separated more quickly after the flocculant solution is mixed with wastewater and enters the inclined plate thickener.

[0034] Specifically, such as Figure 2 and Figure 3 As shown, the first drive unit includes a first gear 12, a first incomplete gear 13, a first sprocket 14, and a motor 17; the first gear 12 is coaxially arranged with and fixedly connected to the unloading head 5; the first incomplete gear 13 is rotatably connected to the mounting head 4 and can mesh with the first gear 12; the first sprocket 14 is fixedly mounted on the rotating shaft of the first incomplete gear 13 and is connected to a second sprocket 16 via a chain 15; the motor 17 is used to drive the second sprocket 16 to rotate.

[0035] When motor 17 drives the first incomplete gear 13 to rotate via the second sprocket 16, chain 15, and first sprocket 14; Figure 3In this state, the first incomplete gear 13 and the first gear 12 are meshed. At this time, the first incomplete gear 13 rotates counterclockwise, causing the first gear 12 to rotate counterclockwise synchronously. The teeth of the first incomplete gear 13 are distributed in half a circle, and the diameters of the first incomplete gear 13 and the first gear 12 are the same. Therefore, after the first gear 12 rotates half a circle, the first incomplete gear 13 and the first gear 12 disengage. The first gear 12 drives the discharge head 5 to rotate half a circle synchronously, and the first material trough 6 rotates to a position offset from the second material trough 9. For every one rotation of the first incomplete gear 13, the first gear 12 rotates half a circle. For every one rotation of the first gear 12, flocculant is filled into the first material trough 6. Therefore, for every two rotations of the first incomplete gear 13, flocculant is filled into the first material trough 6.

[0036] Specifically, such as Figures 2-6 As shown, the second drive unit includes an elastic element 18, a first bevel gear 19, a second bevel gear 20, a first rotating shaft 52, a second incomplete gear 21, a first push block 53, a wedge-shaped push rod 50, an arc-shaped push rod 51, a first rack 22, and a top block 23; one end of the elastic element 18 is connected to the baffle 10, and the other end is connected to the mounting head 4. The elastic element 18 is used for resetting the baffle 10 and for ensuring that the baffle 10 is tightly fitted to the bottom surface of the unloading head 5 when closed; the first bevel gear 19 is fixedly mounted on the rotating shaft of the first incomplete gear 13; the second bevel gear 20 meshes with the first bevel gear 19 and is rotatably connected to the mounting head 4; the first rotating shaft 52 is coaxially arranged with the second bevel gear 20 and is elastically slidably connected to the rotating shaft of the second bevel gear 20 along the axial direction; the second incomplete gear 21 and the first bevel gear 20 are connected to the first bevel gear 19 and the second incomplete gear 20. The first rotating shaft 52 is fixedly connected; the first push block 53 is disposed on the side of the first rotating shaft 52 near the mounting head 4; the wedge-shaped push rod 50 is slidably connected to the mounting head 4 in the vertical direction and the wedge-shaped surface is located directly above the first push block 53; the arc-shaped push rod 51 is fixedly installed on the outer wall of the unloading head 5, and the end of the arc-shaped push rod 51 is provided with an inclined surface; during the rotation of the unloading head 5, the arc-shaped push rod 51 can drive the wedge-shaped push rod 50 to move downward through the inclined surface, thereby causing the wedge-shaped push rod 50 to drive the first push block 53 to push the first rotating shaft 52 to move closer to the second bevel gear 20; the first rack 22 is slidably connected to the mounting head 4 in the vertical direction and can mesh with the second incomplete gear 21; the top block 23 is fixedly connected to the baffle 10 and the top is provided with a receiving groove 24 that is clearance-fitted with the bottom end of the first rack 22.

[0037] like Figure 2 , Figure 5 and Figure 9As shown, in the illustrated state, the first material trough 6 and the second material trough 9 are in a connected state. The bottom surface of the wedge-shaped push rod 50 is in contact with the top surface of the wedge-shaped push rod 50. The first rotating shaft 52 is retracted into the inner side of the rotating shaft of the second bevel gear 20. The spring connected to the first rotating shaft 52 is in a compressed state. The second incomplete gear 21 is located outside the first rack 22. When the first incomplete gear 13 rotates counterclockwise, it drives the unloading head 5 to rotate through the first gear 12, causing the first material trough 6 and the second material trough 9 to be misaligned. The unloading head 5 then drives the arc-shaped push rod 51 to rotate counterclockwise synchronously. The arc-shaped push rod 51 rotates one... After setting the angle, it disengages from the wedge-shaped push rod 50; after losing the pressure of the arc-shaped push rod 51, under the action of the spring force, the first rotating shaft 52 drives the second incomplete gear 21 to move closer to the mounting head 4, and the second incomplete gear 21 moves to the right side of the first rack 22 (the second incomplete gear 21 will drive the first rack 22 to move when it rotates later); when the first incomplete gear 13 rotates half a turn, the unloading head 5 rotates half a turn simultaneously, the first material groove 6 and the second material groove 9 are misaligned, and at the same time, the inclined surface at the end of the arc-shaped push rod 51 rotates counterclockwise to the side of the wedge-shaped push rod 50; Figure 4 As shown, after the second incomplete gear 21 rotates half a turn synchronously with the first incomplete gear 13, it is in a state of meshing with the first rack 22. The second incomplete gear 21 continues to rotate, driving the first rack 22 to move downward. The first rack 22, in conjunction with the top block 23 and the receiving groove, drives one end of the baffle 10 to move downward and stretches the elastic element 18. At this time, the bottom of the second material tank 9 is in an open state, and the flocculant in the second material tank 9 falls down along the baffle 10 into the dissolving tank 11 to mix with the solvent. When the second incomplete gear 21 rotates counterclockwise to the position where it is disengaged from the first rack 22, the baffle 10 and the first rack 22 move to the initial position under the elastic force of the elastic element 18. After the first incomplete gear 13 rotates again to mesh with the first gear 12, the first incomplete gear 13 drives the discharge head 5 and the arc-shaped push rod 51 to rotate through the first gear 12. The discharge head 5 and the arc-shaped push rod 51 both rotate counterclockwise by half a turn. Rod 51 drives wedge-shaped push rod 50 downward through inclined plane to squeeze first push block 53. First push block 53 pushes first rotating shaft 52 into the rotating shaft of second bevel gear 20. Driven by first rotating shaft 52, second incomplete gear 21 moves to the outside of first rack 22. That is, when first incomplete gear 13 rotates for the second turn to connect first material trough 6 and second material trough 9, second incomplete gear 21 and first rack 22 are in a staggered state. Second incomplete gear 21 does not contact first rack 22 when rotating for the second turn. When first material trough 6 and second material trough 9 are connected, baffle 10 is always in a closed state. This can ensure that the filling and feeding process of flocculant in second material trough 9 is always carried out in sequence without confusion. At the same time, the filling amount of flocculant in second material trough 9 can be kept constant, and the amount of flocculant added to dissolving tank 11 can be kept stable. Therefore, the concentration of flocculant solution can be more accurate.

[0038] Specifically, such as Figure 3 , Figures 8-11 As shown, the control unit includes an inlet pipe 25, a first inlet valve 27, a pin 28, a float 29, a push rod 31, a drain pipe 32, a frame 33, a drain valve 34, a second rack 35, a first traction rope 36, a wedge-shaped limiting block 37, a second push block 38, a pressure rod 39, a second inlet valve 41, and a third traction rope 44; the inlet pipe 25 is installed on the side wall of the dissolving tank 11; a second inlet 26 is provided inside the inlet pipe 25, the diameter of the second inlet 26 being smaller than the diameter of the inlet pipe 25; the first inlet valve 27 is installed inside the inlet pipe 25 and is used to control the opening and closing of the second inlet 26; the pin 28 is slidably connected to the inlet pipe 25; the float 29 is set inside the dissolving tank 11 and is fixedly connected to the rotating arm 30; the end of the rotating arm 30 away from the float 29 is hinged to the dissolving tank 11 by a pin; the push rod 31 is installed on the rotating arm 30; when the float 29 rises and drives the rotating arm 30 to rotate upward, it can drive the pin 28 through the push rod 31 to apply pressure to the first inlet valve 27 to close the second inlet 26; one end of the drain pipe 32 is fixedly installed at the bottom of the dissolving tank 11, and the other end is connected to the first inlet 2; the frame 33 is fixedly installed at the bottom of the dissolving tank 11; the drain valve 34 and the frame 33 are vertically aligned. The system features a sliding connection; the second rack 35 is slidably connected to the mounting head 4 in the vertical direction and is positioned on the side of the first rack 22 away from the mounting head 4, and can mesh with the second incomplete gear 21; one end of the first traction rope 36 is fixedly connected to the second rack 35, and the other end is fixedly connected to the top of the drain valve 34; the wedge-shaped limiting block 37 is elastically slidably connected to the drain valve 34 in the horizontal direction and is used to limit the opening of the drain valve 34; the second push block 38 is fixedly connected to the rotating arm 30; the pressure rod 39 is slidably connected to the drain valve 34 in the vertical direction and is located at the bottom of the rotation path of the second push block 38. The pressure rod 39 is connected to the wedge-shaped limiting block 37 via the second traction rope 40; when the second push block 38 drives the pressure rod 39 to move downward, the wedge-shaped limiting block 37 moves into the drain valve 34 under the action of the second traction rope 40; the second water inlet valve 41 is slidably connected to the dissolving tank 11 in the vertical direction and is used to seal one end of the water inlet pipe 25 located inside the dissolving tank 11; the bottom end of the second water inlet valve 41 is hinged to a connecting rod 42, and the bottom end of the connecting rod 42 is hinged to a first slider 43 that is horizontally slidably connected to the dissolving tank 11; one end of the third traction rope 44 is fixedly connected to the first slider 43, and the other end is fixedly connected to the drain valve 34.

[0039] like Figure 11As shown, in the illustrated state, the dissolving tank 11 is filled with a measured amount of solvent. The float 29 is at a certain height under the buoyancy of the solvent. At this time, the push rod 31 applies pressure to the first water inlet valve 27 through the pin 28, the second water inlet 26 is blocked by the first water inlet valve 27, and the water inlet pipe 25 is closed. When the first incomplete gear 13 rotates for the first turn, the second incomplete gear 21 moves towards the side closer to the mounting head 4. The second incomplete gear 21 moves to the side of the first rack 22. During the rotation of the second incomplete gear 21, the baffle 10 opens, and the flocculant in the second material tank 9 falls into the dissolving tank 11. When the first incomplete gear 13 rotates for the first turn... During the second rotation, the second incomplete gear 21 moves away from the mounting head 4. The second incomplete gear 21 moves to the side of the second rack 35. As the second incomplete gear 21 rotates synchronously with the first incomplete gear 13 for the second rotation, it drives the second rack 35 downwards. The second rack 35 then drives the top end of the first traction rope 36 downwards, and the bottom end of the first traction rope 36 drives the drain valve 34 upwards. After the drain valve 34 moves upwards, the drain pipe 32 opens, and the flocculant solution in the dissolving tank 11 enters the first inlet 2 through the drain pipe 32, mixes with the sewage, and flows into the inclined plate thickening tank 1. Figure 7 As shown, when the drain valve 34 moves upward, one end of the third traction rope 44 will be driven upward synchronously by the drain valve 34, and the other end will drive the first slider 43 to move closer to the drain valve 34. The first slider 43 will lift the second inlet valve 41 through the connecting rod 42, closing the bottom end of the inlet pipe 25; during the discharge process of the solution in the dissolving tank 11, the clear water in the inlet pipe 25 will not flow into the dissolving tank 11; as Figure 10 As shown, when the wedge-shaped limiting block 37 moves upward above the frame 33, the wedge-shaped limiting block 37 limits the drain valve 34; when the solution in the dissolving tank 11 is completely discharged from the drain pipe 32, the float 29 rotates to the position shown. Figure 11 At the bottom, the second push block 38 on the rotating arm 30 drives the pressure rod 39 downward. The pressure rod 39 moves the wedge-shaped limiting block 37 into the drain valve 34 via the second traction rope 40. After the wedge-shaped limiting block 37 is misaligned with the top surface of the frame 33, the supporting force of the drain valve 34 disappears. Under the action of gravity, the drain valve 34 moves downward to the position of closing the drain pipe 32. The pressure exerted by the drain valve 34 on the second water inlet valve 41 via the third traction rope 44 disappears, and the clean water in the water inlet pipe 25 can flow into the dissolving tank 11. As the liquid level rises, the float will rise. When the liquid level reaches the specified height, the rotating arm 30 applies pressure to the first water inlet valve 27 via the push rod 31 and the pin 28 to close the water inlet pipe 25. This ensures that the amount of solvent added in the dissolving tank 11 remains stable and better guarantees the solution concentration.

[0040] Specifically, the bottom of the drain valve 34, the first inlet valve 27, and the second inlet valve 41 are all made of rubber material; the rubber material is elastic and can better seal the inlet pipe 25 and the drain pipe 32.

[0041] Specifically, float 29 is a rubber sphere.

[0042] Specifically, such as Figure 1 , Figure 7 , Figures 12-13 As shown, the measuring cylinder 8 consists of a cylinder body 45 and a rotating stop 46; the cylinder body 45 is fixedly connected to the mounting head 4, and a slot for receiving the rotating stop 46 is provided on the cylinder body 45; the rotating stop 46 is coaxially arranged with the cylinder body 45 and rotatably connected to the cylinder body 45; the rotating stop 46 is used to control the volume of the second material tank 9; the water inlet pipe 25 is slidably connected to the dissolving tank 11 in the horizontal direction; a driving mechanism is provided on the side of the mounting head 4, which is used to control the rotation of the rotating stop 46 and the inlet according to the water pressure of the water outlet pipe 3. The water pipe 25 slides; the drive mechanism includes a first hydraulic cylinder 47, a second hydraulic cylinder 48, and a turbine flow meter 49; the fixed end of the first hydraulic cylinder 47 is fixedly connected to the mounting head 4, and the output end is fixedly connected to the rotating stop block 46; the fixed end of the second hydraulic cylinder 48 is fixedly connected to the dissolving tank 11, and the output end is fixedly connected to the inlet pipe 25; the turbine flow meter 49 is installed on the outlet pipe 3 and is used to measure the water pressure in the outlet pipe 3, and to control the extension and retraction of the first hydraulic cylinder 47 and the second hydraulic cylinder 48 according to the water pressure in the outlet pipe 3.

[0043] The turbine flow meter 49 installed on the outlet pipe 3 can detect the pressure of the purified water flow from the inclined plate thickener 1. When the water pressure decreases, it indicates that there is some blockage in the inclined plate assembly inside the inclined plate thickener 1. At this time, the amount of sewage entering the inclined plate thickener 1 from the first inlet 2 will decrease accordingly, so the amount of flocculant dilution solution prepared should also be reduced accordingly; Figure 12 As shown, when the turbine flow meter 49 detects a certain drop in water pressure in the outlet pipe 3, the first hydraulic cylinder 47 drives the rotating stop 46 to rotate counterclockwise by a specified angle within the cylinder 45. As the rotating stop 46 rotates, the volume of the second feed trough 9 decreases accordingly, thus reducing the amount of flocculant added to the dissolving tank 11. Figure 13As shown, in this embodiment, the capacity of the second material tank 9 is divided into three levels, and the rotating stop 46 rotates counterclockwise by 60° each time. While the first hydraulic cylinder 47 is working, the second hydraulic cylinder 48 drives the water inlet pipe 25 to move a small distance into the dissolving tank 11, so that the pin 28 is closer to the top rod 31. The rotating arm 30 can rotate a smaller angle so that the top rod 31 drives the pin 28 to press the first water inlet valve 27. The liquid level of the solution injected into the dissolving tank 11 will decrease, and the amount of the prepared flocculant solution will decrease, which can better match the sewage flow and make the sewage purification efficiency the highest. After the blockage in the inclined plate assembly is cleared, the first hydraulic cylinder 47 and the second hydraulic cylinder 48 can drive the rotating stop 46 and the water inlet pipe 25 to move back to the initial position.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment system for phosphorus extraction from tailings, comprising an inclined plate thickener and a first inlet and an outlet pipe disposed on the inclined plate thickener, characterized in that: Also includes: The mounting head is located above the inclined plate thickening box and has a cylindrical through slot that runs through both its top and bottom ends; A material feeding head is coaxially arranged with the through groove and rotatably connected to the mounting head; the material feeding head is provided with a first material groove. A feed pipe is fixedly installed on the top of the mounting head and communicates with the through groove; the feed pipe is used to convey flocculant into the downward feed head. A measuring cylinder is fixedly installed in the through groove and located directly below the material feed head; the measuring cylinder has a second material groove that can communicate with the first material groove; A baffle, hinged to the mounting head and used to cover the second hopper; The dissolving tank is located below the mounting head; The first drive unit is used to drive the discharge head to rotate, so that the first material trough and the second material trough are intermittently connected to deliver flocculant into the measuring cylinder; The second drive unit is used to drive the baffle to open when the first and second material tanks are misaligned, so that the flocculant in the measuring cylinder falls into the dissolving tank. A control unit for controlling the inlet and outlet water of the dissolving tank; the control unit includes: A water inlet pipe is installed on the side wall of the dissolving tank; a second water inlet is provided inside the water inlet pipe, the diameter of the second water inlet being smaller than the diameter of the water inlet pipe; The first inlet valve is installed inside the inlet pipe and is used to control the opening and closing of the second inlet. The pin is slidably connected to the water inlet pipe. A float is set inside a dissolving tank and fixedly connected to a rotating arm; the end of the rotating arm away from the float is hinged to the dissolving tank by a pin. A push rod is installed on the rotating arm; when the float rises and drives the rotating arm to rotate upward, the push rod can drive the pin to apply pressure to the first water inlet valve to close the second water inlet. The measuring cylinder consists of a cylinder body and a rotating stop block; the cylinder body is fixedly connected to the mounting head, and a slot for receiving the rotating stop block is provided on the cylinder body; the rotating stop block is coaxially arranged with the cylinder body and rotatably connected to the cylinder body; the rotating stop block is used to control the volume of the second material tank; the water inlet pipe is slidably connected to the dissolving tank in the horizontal direction; a driving mechanism is provided on the side of the mounting head, and the driving mechanism is used to control the rotation of the rotating stop block and the sliding of the water inlet pipe according to the water pressure of the water outlet pipe; The driving mechanism includes a first hydraulic cylinder, a second hydraulic cylinder, and a turbine flow meter; the fixed end of the first hydraulic cylinder is fixedly connected to the mounting head, and the output end is fixedly connected to the rotating stop; the fixed end of the second hydraulic cylinder is fixedly connected to the dissolving tank, and the output end is fixedly connected to the inlet pipe; the turbine flow meter is installed on the outlet pipe and is used to measure the water pressure in the outlet pipe, and to control the extension and retraction of the first and second hydraulic cylinders according to the water pressure in the outlet pipe.

2. The wastewater treatment system for phosphorus extraction from tailings according to claim 1, characterized in that: The first driving unit includes: The first gear is arranged coaxially with the unloading head and is fixedly connected to the unloading head; The first incomplete gear is rotatably connected to the mounting head and can mesh with the first gear; The first sprocket is fixedly mounted on the rotating shaft of the first incomplete gear and is connected to the second sprocket via chain drive; The motor is used to drive the second sprocket to rotate.

3. The wastewater treatment system for phosphorus extraction from tailings according to claim 2, characterized in that: The second drive unit includes: An elastic element, one end of which is connected to a baffle and the other end of which is connected to a mounting head, is used for resetting the baffle and for ensuring that the baffle fits tightly against the bottom surface of the discharge head when closed. The first bevel gear is fixedly mounted on the rotating shaft of the first incomplete gear; The second bevel gear meshes with the first bevel gear and is rotatably connected to the mounting head; The first rotating shaft is arranged coaxially with the second bevel gear and is elastically slidably connected to the rotating shaft of the second bevel gear along the axial direction; The second incomplete gear is fixedly connected to the first rotating shaft; The first push block is located on the side of the first rotating shaft near the mounting head; The wedge-shaped push rod is slidably connected to the mounting head in the vertical direction, and the wedge-shaped surface is located directly above the first push block; An arc-shaped push rod is fixedly installed on the outer wall of the unloading head, and the end of the arc-shaped push rod is provided with an inclined surface; during the rotation of the unloading head, the arc-shaped push rod can drive the wedge-shaped push rod to move downward through the inclined surface, thereby causing the wedge-shaped push rod to drive the first push block to push the first rotating axis to move closer to the second bevel gear. The first rack is slidably connected to the mounting head in the vertical direction and can mesh with the second incomplete gear; The top block is fixedly connected to the baffle and has a receiving groove on its top that fits with the bottom end of the first rack.

4. A wastewater treatment system for phosphorus extraction from tailings according to claim 3, characterized in that: The control unit further includes: The drain pipe is fixedly installed at one end at the bottom of the dissolving tank, and the other end is connected to the first water inlet; The frame is fixedly installed at the bottom of the dissolving tank; The drain valve is slidably connected to the frame in the vertical direction; The second rack is slidably connected to the mounting head in the vertical direction and is located on the side of the first rack away from the mounting head, and can mesh with the second incomplete gear; The first traction rope is fixedly connected at one end to the second rack and at the other end to the top of the drain valve. The wedge-shaped limiting block is elastically slidably connected to the drain valve in the horizontal direction and is used to limit the drain valve after it is opened. The second push block is fixedly connected to the rotating arm; The pressure rod is slidably connected to the drain valve in the vertical direction and is located at the bottom of the rotation path of the second push block; the pressure rod is connected to the wedge-shaped limiting block through the second traction rope; when the second push block drives the pressure rod to move downward, the wedge-shaped limiting block moves into the drain valve under the action of the second traction rope. The second water inlet valve is slidably connected to the dissolving tank in the vertical direction and is used to seal one end of the water inlet pipe located inside the dissolving tank; a connecting rod is hinged to the bottom end of the second water inlet valve, and a first slider is hinged to the bottom end of the connecting rod and slidably connected to the dissolving tank in the horizontal direction. The third traction rope is fixedly connected at one end to the first slider and at the other end to the drain valve.

5. A wastewater treatment system for phosphorus extraction from tailings according to claim 4, characterized in that: The bottom of the drain valve, the first inlet valve, and the second inlet valve are all made of rubber.

6. A wastewater treatment system for phosphorus extraction from tailings according to claim 4, characterized in that: The float is a rubber sphere.

Images