High-efficiency sewage treatment flocculent precipitation device and method thereof

Abstract

The invention discloses an efficient sewage treatment flocculent precipitation device and a method thereof, and relates to the field of sewage treatment. The efficient sewage treatment flocculation and sedimentation device comprises a folded plate flocculation basin, a horizontal sedimentation basin, a plurality of groups of suspended sand filters and a walking type mud pumping unit, sewage is introduced into the folded plate flocculation basin through the folded plate flocculation basin and then flocculated, the horizontal sedimentation basin is arranged at the water outlet end of the folded plate flocculation basin, and the walking type mud pumping unit is arranged at the water outlet end of the horizontal sedimentation basin. One ends of the multiple groups of suspended sand filters and the inner wall of the horizontal flow sedimentation tank are integrally formed by pouring, the other ends of the suspended sand filters are provided with supporting rods, and the walking type mud pumping unit is movably arranged at the top of the horizontal flow sedimentation tank. According to the efficient sewage treatment flocculent precipitation device, the suspended sand filter does not interfere with the walking path of the walking type sludge pumping unit, cleaning dead angles on the periphery of the sand filter are effectively eliminated, the walking type sludge pumping unit can reciprocate in the length direction of the horizontal flow sedimentation tank, and deposited sludge on the inner bottom wall of the horizontal flow sedimentation tank can be comprehensively cleaned.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a high-efficiency wastewater treatment flocculation sedimentation device and method. Background Technology

[0002] In wastewater treatment processes, flocculation and sedimentation are crucial steps in removing suspended impurities from wastewater, and their treatment effectiveness directly impacts the quality of the effluent. To simplify the treatment process, shorten wastewater transport paths, and reduce equipment footprint, existing flocculation and sedimentation devices often employ an integrated design that directly integrates sand filters within a horizontal flow sedimentation tank. This aims to improve space utilization, reduce head loss, and lower equipment investment and operating energy consumption through a compact layout.

[0003] However, this integrated design resulted in insufficient synergy between sedimentation, sand filtration, and sludge cleaning in the horizontal flow sedimentation tank, which in turn restricted the improvement of the overall treatment efficiency of the device.

[0004] On the one hand, the built-in installation location of the sand filter can easily interfere with the walking path of the mobile sludge suction frame, which not only limits the movement range of the mobile sludge suction frame, but also causes cleaning dead corners to form around the sand filter, making it difficult to effectively remove the deposited sludge. Long-term accumulation can easily breed bacteria and affect water quality.

[0005] On the other hand, the existing walking sludge scraper is equipped with a fixed sludge scraper structure, which causes significant disturbance to the water flow in the pool during the sludge scraping process. This can easily disrupt the sedimentation balance, causing the settled flocs to resuspend and reducing the sedimentation effect. Furthermore, the distribution density of the sludge scraper cannot be flexibly adjusted according to the thickness of the sludge deposit. When dealing with thin sludge layers, it is easy to over-disturb the water body, while when dealing with thick sludge layers, it is difficult to completely break up the compacted sludge, resulting in poor adaptability. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency wastewater treatment flocculation sedimentation device and method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency wastewater treatment flocculation and sedimentation device, comprising:

[0008] The folded plate flocculation tank is used to carry out flocculation after sewage is fed into it.

[0009] The horizontal flow sedimentation tank is located at the outlet end of the folded plate flocculation tank. The wastewater after flocculation is discharged into the horizontal flow sedimentation tank for sedimentation.

[0010] Several sets of suspended sand filters, one end of which is integrally cast with the inner wall of a horizontal flow sedimentation tank and located away from the folded plate flocculation tank, and the other end of the suspended sand filter is equipped with a support rod, and the end of the support rod is fixedly installed on the inner wall of the horizontal flow sedimentation tank.

[0011] The mobile sludge pumping unit is located at the top of the horizontal flow sedimentation tank and can move back and forth along the length of the tank to pump out the sludge deposited on the bottom wall of the tank.

[0012] Preferably, the suspended sand filter has an overflow hole on its outer side, and the interior of the suspended sand filter is filled with a sand layer. A drain pipe connected to the outside is inserted into the sand layer. The supernatant of the settled wastewater enters the interior of the suspended sand filter through the overflow hole, and is discharged through the drain pipe after being filtered by the sand layer. The inlet end of the folded plate flocculation tank is equipped with a stirring tank. The wastewater is mixed with coagulant in the stirring tank and then fed into the folded plate flocculation tank.

[0013] Preferably, a partition wall is longitudinally cast in the middle of the inner wall of the horizontal flow sedimentation tank, and slide rails are symmetrically laid on the top of the horizontal flow sedimentation tank along its length.

[0014] Preferably, the walking sludge pumping unit includes a walking frame slidably mounted on the top of the horizontal flow sedimentation tank via a slide rail, a rigid sludge pumping pipe connected to the walking frame, a sludge-pulling claw assembly for moving the sludge on the bottom wall of the horizontal flow sedimentation tank, and an adjustment component that is drivenly connected to the sludge-pulling claw assembly.

[0015] Preferably, the rigid sludge suction pipe includes a main pipe connected to an external self-priming sludge pump and a sludge suction pipe extending into the horizontal flow sedimentation tank. The main pipe is installed above the traveling frame, and the two sludge suction pipes are symmetrically arranged with a central partition wall. The sludge suction pipes are L-shaped. The top end of the vertical section of the sludge suction pipe is connected to the main pipe. The horizontal section of the sludge suction pipe is parallel to the inner bottom wall of the horizontal flow sedimentation tank. Multiple first sludge suction cylinders and multiple second sludge suction cylinders are respectively arranged on both sides of the horizontal section of the sludge suction pipe. The ends of the first and second sludge suction cylinders away from the sludge suction pipe are inclined downwards. Sludge suction holes are opened on the outer sides of the first and second sludge suction cylinders, and the multiple first sludge suction cylinders and multiple second sludge suction cylinders are staggered.

[0016] Preferably, the mud-removing claw assembly includes a first mud-removing claw fixedly installed at the bottom of the first mud-removing cylinder, a second mud-removing claw fixedly installed at the bottom of the second mud-removing cylinder, and a plurality of densely spaced mud-removing claws installed below the horizontal section of the mud-removing pipe. The densely spaced mud-removing claws are located between adjacent first and second mud-removing claws, and the adjusting component is connected to the plurality of densely spaced mud-removing claws for driving the plurality of densely spaced mud-removing claws to rotate, thereby switching between the vertical mud-removing operation state and the horizontal storage state.

[0017] Preferably, the adjustment assembly includes an adjustment bar, multiple adjustment seats, a first transmission box, and a second transmission box. The multiple adjustment seats are fixedly installed at the bottom of the horizontal section of the mud-dredging pipe, and the ends of the densified mud-dispelling claws are rotatably connected to the inner walls of the adjustment seats. The adjustment bar passes through the multiple adjustment seats and is slidably connected to the inner walls of the adjustment seats. The first transmission box and the second transmission box are fixedly connected at the junction of the horizontal and vertical sections of the mud-dredging pipe. A protective sleeve is fixedly connected between the top of the second transmission box and the bottom of the traveling frame. A drive motor is fixedly installed on the top of the traveling frame. The drive motor is driven by a drive rod, the bottom end of which passes through the protective sleeve, and the drive rod is used to drive the adjustment bar to move laterally.

[0018] Preferably, the adjusting strip has multiple sets of toothed grooves below it, the end of the densified mud-removing claw is equipped with a quarter gear, and the quarter gear meshes with the toothed groove. The adjusting strip has a front-to-back through-groove limiting groove. The inner wall of the adjusting seat is fixedly installed with a limiting block that is slidably disposed in the limiting groove. The inner wall of the first transmission box is rotatably connected with an internal threaded sleeve. A screw is threadedly connected to the inner wall of the internal threaded sleeve. The end of the screw extends outward and is fixedly connected to the end of the adjusting strip. The other end of the internal threaded sleeve and the bottom end of the drive rod both extend toward the interior of the second transmission box and are fixedly fitted with bevel gears. The two bevel gears mesh with each other.

[0019] Preferably, a drive wheel is fitted on the outer side of the output end of the drive motor, the top ends of the two drive rods pass through the walking frame and are fixedly fitted with driven wheels, and the drive wheel and the two driven wheels are connected by belt drive. A protective cover is fixedly installed on the outer side of the drive wheel and the driven wheels, the protective cover is fixedly connected to the top of the walking frame, and the drive motor is fixedly installed on the top of the protective cover.

[0020] A highly efficient wastewater treatment method for flocculation and sedimentation, the method comprising the following steps:

[0021] Step 1: Coagulation pretreatment. The wastewater to be treated is introduced into the mixing tank. A preset dose of coagulant is added to the mixing tank, and the mixing mechanism in the mixing tank is started to fully mix the wastewater and coagulant to form a preliminary floc suspension.

[0022] Step 2: Folded plate flocculation reaction. The floc suspension obtained in Step 1 is passed into the folded plate flocculation tank. The vortex and turbulence generated by the folded plate structure in the folded plate flocculation tank promote the further collision and aggregation of the initial flocs to form large floc particles.

[0023] Step 3: Horizontal flow sedimentation separation. The wastewater after flocculation reaction is discharged into the horizontal flow sedimentation tank. The wastewater flows slowly along the channels on both sides of the partition wall in the horizontal flow sedimentation tank. Under the action of gravity, the flocs gradually settle to the bottom wall of the horizontal flow sedimentation tank, realizing the initial separation of solid and liquid. The supernatant flows to the end of the horizontal flow sedimentation tank away from the folded plate flocculation tank.

[0024] Step 4: Deep purification by sand filtration. The supernatant from step 3 enters the interior of the suspended sand filter through the overflow hole on the outside of the suspended sand filter, passes through the filling sand layer, and uses the interception and adsorption effect of the sand layer to remove the fine suspended particles remaining in the supernatant. The purified water is discharged through the drain pipe inserted in the sand layer.

[0025] Step 5: Sludge extraction and cleaning. While or after sedimentation in Step 3, start the mobile sludge pumping unit and the external self-priming sludge pump to pump the sludge to the designated sludge treatment area.

[0026] The technical effects and advantages of this invention are as follows:

[0027] 1. High-efficiency wastewater treatment flocculation and sedimentation device: Through the series connection of the folded plate flocculation tank and the horizontal flow sedimentation tank, flocculation and sedimentation are connected in an orderly manner, ensuring the effective separation of suspended impurities. The suspended sand filter adopts a suspended installation method with one end integrally cast with the inner wall of the horizontal flow sedimentation tank and the other end fixed by a support rod. This not only greatly improves the installation stability of the sand filter and avoids structural displacement or leakage caused by water flow impact during long-term operation, ensuring stable operation of the filtration process, but also, due to the special structural design of the walking sludge pumping unit, the suspended sand filter will not interfere with the walking path of the walking sludge pumping unit, effectively eliminating cleaning dead corners around the sand filter. The walking sludge pumping unit can move back and forth along the length of the horizontal flow sedimentation tank, which significantly expands the sludge pumping coverage area compared to fixed-point sludge pumping, and can thoroughly clean the deposited sludge on the bottom wall of the horizontal flow sedimentation tank, avoiding sludge accumulation that affects the sedimentation effect.

[0028] 2. High-efficiency wastewater treatment flocculation and sedimentation device: The first sludge-dispersing claw, the second sludge-dispersing claw, and the denser sludge-dispersing claw work together. The density of sludge dispersing can be flexibly adjusted by switching the state of the denser sludge-dispersing claw 433. For thick sludge layers, the denser sludge-dispersing claw is activated to thoroughly disperse the sludge. For thin sludge layers, the denser sludge-dispersing claw is used to collect the sludge and reduce disturbance. It adapts to different sludge thickness requirements. The denser sludge-dispersing claw can switch between vertical sludge dispersing and horizontal collection through the adjustment component. Vertical sludge dispersing ensures the dispersion effect during sludge pumping, while horizontal collection significantly reduces water flow resistance and water disturbance when not pumping or moving, preventing the re-suspension of settled flocs. This reduces energy consumption while ensuring sedimentation effect. The denser sludge-dispersing claw is installed below the horizontal section of the sludge pumping pipe and moves synchronously with the sludge pumping cylinder to achieve coordinated operation of sludge dispersing and pumping, improve sludge cleaning efficiency, and further optimize the synergy between sludge pumping and sedimentation.

[0029] 3. The high-efficiency wastewater treatment flocculation and sedimentation device uses a drive motor as the power source for the adjustment components. The transmission is stable and the power is sufficient, which can effectively drive the action of the densified sludge-removing claws and ensure the reliability of state switching. The setting of the first and second transmission boxes can realize flexible conversion of the driving direction, adapt to the structural layout of the device, reduce space occupation, and the protective sleeve protects the drive rod to prevent sewage and sludge from corroding the drive rod and extend the service life of the equipment. Multiple adjustment seats guide and support the adjustment bar, ensuring the smoothness of the lateral movement of the adjustment bar, avoiding jamming, and improving the smoothness of state switching. The overall transmission structure is compact and integrated into the walking frame and sludge suction pipe, without occupying extra space and ensuring the integrity of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure between the horizontal flow sedimentation tank and the suspended sand filter tank of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure between the horizontal flow sedimentation tank and the mobile sludge pumping unit of the present invention;

[0033] Figure 4 This is a plan view of the horizontal flow sedimentation tank and the mobile sludge removal unit of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the walking sludge pumping unit of the present invention;

[0035] Figure 6 This is a partial structural schematic diagram of the mud suction pipe, mud-removing claw assembly, and adjustment component of the present invention.

[0036] Figure 7 This is a schematic diagram of the mud suction pipe of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure between the encrypted mud-removing claw and the adjustment component of the present invention;

[0038] Figure 9 This is a partial structural cross-sectional view of the regulating component of the present invention;

[0039] Figure 10 This is a cross-sectional view of the connection between the adjustment component and the encrypted mud-removing claw of the present invention;

[0040] Figure 11 This is a partial structural schematic diagram of the adjustment component of the present invention.

[0041] In the diagram: 1. Folded plate flocculation tank; 2. Horizontal flow sedimentation tank; 21. Central partition wall; 22. Slide rail; 3. Suspended sand filter; 31. Sand layer; 32. Support rod; 4. Walking sludge pumping unit; 41. Walking frame; 42. Rigid sludge pumping pipe fittings; 421. Main pipe; 422. Sludge pumping pipe; 423. First sludge pumping cylinder; 424. Second sludge pumping cylinder; 425. Sludge pumping hole; 43. Sludge-pulling claw assembly; 431. First sludge-pulling claw; 432. Second sludge-pulling claw; 433. Densified sludge-pulling claws ; 44. Adjustment assembly; 441. Adjustment bar; 4411. Gear groove; 4412. Quarter gear; 4413. Limiting groove; 4414. Limiting block; 442. Adjustment seat; 443. First transmission box; 4431. Internal threaded sleeve; 4432. Screw; 444. Second transmission box; 445. Protective sleeve; 446. Drive motor; 4461. Drive wheel; 447. Drive rod; 4471. Bevel gear; 4472. Driven wheel; 5. Mixing tank. Detailed Implementation

[0042] 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.

[0043] This invention provides, for example Figures 1-11 The high-efficiency wastewater treatment flocculation and sedimentation device shown includes:

[0044] Folded plate flocculation tank 1: Wastewater is fed into folded plate flocculation tank 1 for flocculation.

[0045] The horizontal flow sedimentation tank 2 is located at the outlet end of the folded plate flocculation tank 1. The wastewater after flocculation is discharged into the horizontal flow sedimentation tank 2 for sedimentation.

[0046] Several sets of suspended sand filters 3 are integrally cast with the inner wall of the horizontal flow sedimentation tank 2 at one end and located away from the folded plate flocculation tank 1. The other end of the suspended sand filter 3 is equipped with a support rod 32, and the end of the support rod 32 is fixedly installed on the inner wall of the horizontal flow sedimentation tank 2.

[0047] The mobile sludge pumping unit 4 is located on top of the horizontal flow sedimentation tank 2 and can move back and forth along the length of the horizontal flow sedimentation tank 2 to pump out the sludge deposited on the bottom wall of the horizontal flow sedimentation tank 2.

[0048] The wastewater to be treated is fed into the folded plate flocculation tank 1. The internal structure of the folded plate flocculation tank 1 enables the flocculation reaction of the wastewater, causing suspended impurities in the wastewater to form flocs. After the flocculation reaction, the wastewater is discharged from the outlet of the folded plate flocculation tank 1 into the horizontal flow sedimentation tank 2. In the horizontal flow sedimentation tank 2, the flocs settle to the bottom wall of the horizontal flow sedimentation tank 2 under the action of gravity. The supernatant in the horizontal flow sedimentation tank 2 flows to the suspended sand filter tank 3 at the end away from the folded plate flocculation tank 1 to complete the subsequent filtration treatment. The walking sludge pumping unit 4 is activated and moves back and forth along the length of the horizontal flow sedimentation tank 2 to simultaneously pump out the sludge deposited on the bottom wall of the horizontal flow sedimentation tank 2 to achieve sludge cleaning.

[0049] By connecting the folded plate flocculation tank 1 and the horizontal flow sedimentation tank 2 in series, the orderly connection between flocculation and sedimentation is achieved, ensuring the effective separation of suspended impurities. The suspended sand filter 3 adopts a suspended installation method in which one end is integrally cast with the inner wall of the horizontal flow sedimentation tank 2 and the other end is fixed by the support rod 32. This not only greatly improves the installation stability of the sand filter and avoids structural displacement or leakage caused by water flow impact during long-term operation, ensuring stable operation of the filtration process, but also, due to the special structural design of the walking sludge pumping unit 4, the suspended sand filter 3 will not interfere with the walking path of the walking sludge pumping unit 4, effectively eliminating the cleaning dead corners around the sand filter. The walking sludge pumping unit 4 can move back and forth along the length of the horizontal flow sedimentation tank 2. Compared with fixed-point sludge pumping, it significantly expands the sludge pumping coverage area and can thoroughly clean the deposited sludge on the inner bottom wall of the horizontal flow sedimentation tank 2, avoiding sludge accumulation that affects the sedimentation effect.

[0050] Furthermore, the suspended sand filter 3 has an overflow hole on its outer side, and the interior of the suspended sand filter 3 is filled with a sand layer 31. A drain pipe connected to the outside is inserted into the sand layer 31. The supernatant of the settled sewage enters the interior of the suspended sand filter 3 through the overflow hole, and is discharged through the drain pipe after being filtered through the sand layer 31. A mixing tank 5 is installed at the inlet end of the folded plate flocculation tank 1. The sewage is mixed with coagulant in the mixing tank 5 and then fed into the folded plate flocculation tank 1.

[0051] Wastewater is first introduced into a mixing tank 5, where a coagulant is added. The wastewater and coagulant are thoroughly mixed through mixing. The mixed wastewater is then introduced into a folded plate flocculation tank 1 for flocculation reaction. The flocculated wastewater is discharged into a horizontal flow sedimentation tank 2 for sedimentation, where the flocs settle to the bottom. The supernatant in the horizontal flow sedimentation tank 2 enters the interior of the sand filter tank through the overflow hole on the outside of the suspended sand filter tank 3. It passes through the sand layer 31 for filtration, removing residual fine suspended impurities. The qualified wastewater after filtration through the sand layer 31 is discharged through the drain pipe inserted in the sand layer 31.

[0052] Furthermore, a central partition wall 21 is longitudinally cast in the middle of the inner wall of the horizontal flow sedimentation tank 2, and slide rails 22 are symmetrically laid on the top of the horizontal flow sedimentation tank 2 along its length.

[0053] After flocculation in the baffle flocculation tank 1, the wastewater enters the horizontal flow sedimentation tank 2. Under the separation effect of the partition wall 21, the wastewater flows smoothly along the two side channels in the horizontal flow sedimentation tank 2 for static sedimentation. The walking sludge pumping unit 4 can move along the length of the tank through the symmetrically laid slide rails 22 on the top of the horizontal flow sedimentation tank 2, and simultaneously complete the sludge pumping in the two side channels.

[0054] Furthermore, the walking sludge pumping unit 4 includes a walking frame 41 slidably mounted on the top of the horizontal flow sedimentation tank 2 via a slide rail 22, a rigid sludge pumping pipe 42 connected to the walking frame 41, a sludge-pulling claw assembly 43 for moving the sludge on the bottom wall of the horizontal flow sedimentation tank 2, and an adjustment component 44 that is pulsatingly connected to the sludge-pulling claw assembly 43.

[0055] The walking frame 41 of the walking sludge pumping unit 4 moves along the length of the tank body at the top of the horizontal flow sedimentation tank 2 via the slide rail 22. During the movement, the adjustment component 44 drives the sludge-pulling claw assembly 43 to move the sludge deposited on the bottom wall of the horizontal flow sedimentation tank 2 to prevent the sludge from hardening. At the same time, the rigid sludge pumping pipe 42 connected to the walking frame 41 simultaneously pumps out the moved sludge to complete the sludge cleaning.

[0056] Furthermore, the rigid sludge suction pipe fitting 42 includes a main pipe 421 connected to an external self-priming sludge pump and a sludge suction pipe 422 extending into the horizontal flow sedimentation tank 2. The main pipe 421 is installed above the walking frame 41. The two sludge suction pipes 422 are symmetrically arranged with the central partition wall 21 and are L-shaped. The top of the vertical section of the sludge suction pipe 422 is connected to the main pipe 421. The horizontal section of the sludge suction pipe 422 is parallel to the inner bottom wall of the horizontal flow sedimentation tank 2. Multiple first sludge suction cylinders 423 and multiple second sludge suction cylinders 424 are respectively arranged on both sides of the horizontal section of the sludge suction pipe 422. The ends of the first sludge suction cylinders 423 and the second sludge suction cylinders 424 away from the sludge suction pipe 422 are both inclined downwards. Sludge suction holes 425 are opened on the outer side of the first sludge suction cylinders 423 and the second sludge suction cylinders 424 are staggered.

[0057] When the external self-priming sludge pump starts, it generates negative pressure through the main pipe 421. The negative pressure is transmitted through the main pipe 421 to two symmetrically arranged L-shaped sludge suction pipes 422. The first sludge suction cylinder 423 and the second sludge suction cylinder 424 on both sides of the horizontal section of the sludge suction pipe 422 extract sludge from the bottom of the pool through the sludge suction hole 425 on the outside. Since the ends of the first sludge suction cylinder 423 and the second sludge suction cylinder 424 that are away from the sludge suction pipe 422 are inclined downward and staggered, the sludge area on both sides of the sludge suction pipe 422 can be fully covered while minimizing disturbance to the water body. The extracted sludge is transported to the external sludge treatment equipment through the sludge suction pipe 422 and the main pipe 421.

[0058] Furthermore, the mud-removing claw assembly 43 includes a first mud-removing claw 431 fixedly installed at the bottom of the first mud-removing cylinder 423, a second mud-removing claw 432 fixedly installed at the bottom of the second mud-removing cylinder 424, and a plurality of dense mud-removing claws 433 installed below the horizontal section of the mud-removing pipe 422. The dense mud-removing claws 433 are located between adjacent first mud-removing claws 431 and second mud-removing claws 432, and the adjusting component 44 is connected to the plurality of dense mud-removing claws 433 for driving the plurality of dense mud-removing claws 433 to rotate, thereby realizing the switching between the vertical mud-removing operation state and the horizontal storage state.

[0059] During sludge removal, the adjusting component 44 drives multiple densely packed sludge-pulling claws 433 to rotate, switching to the vertical sludge-pulling operation state. The walking frame 41 drives the sludge-pulling pipe 422 to move, simultaneously driving the first sludge-pulling claw 431 at the bottom of the first sludge-pulling cylinder 423, the second sludge-pulling claw 432 at the bottom of the second sludge-pulling cylinder 424, and the densely packed sludge-pulling claws 433 in between to move synchronously, comprehensively moving the sludge at the bottom of the pool and breaking up the compacted sludge. After the sludge removal operation is completed, the adjusting component 44 drives the densely packed sludge-pulling claws 433 to rotate again, switching to the horizontal storage state to reduce water flow resistance during movement.

[0060] The cooperation of the first mud-dispersing claw 431, the second mud-dispersing claw 432, and the dense mud-dispersing claw 433 allows for flexible adjustment of mud-dispersing density through the switching of the state of the dense mud-dispersing claw 433. For thick sludge layers, the dense mud-dispersing claw 433 is activated to thoroughly disperse the sludge, while for thin sludge layers, the dense mud-dispersing claw 433 is retracted to reduce disturbance, adapting to different sludge thickness requirements. The dense mud-dispersing claw 433 can switch between vertical mud-dispersing and horizontal retraction states through the adjustment component 44. Vertical mud-dispersing during sludge pumping ensures the dispersion effect, while horizontal retraction during non-pumping or movement significantly reduces water flow resistance and water disturbance, preventing the re-suspension of settled flocs, reducing energy consumption while ensuring sedimentation effect. The dense mud-dispersing claw 433 is installed below the horizontal section of the sludge pumping pipe 422 and moves synchronously with the sludge pumping cylinder to achieve coordinated operation of mud dispersing and pumping, improving sludge cleaning efficiency and further optimizing the synergy between sludge pumping and sedimentation.

[0061] Furthermore, the adjustment assembly 44 includes an adjustment bar 441, multiple adjustment seats 442, a first transmission box 443, and a second transmission box 444. The multiple adjustment seats 442 are fixedly installed at the bottom of the horizontal section of the mud suction pipe 422, and the ends of the dense mud-pulling claws 433 are rotatably connected to the inner wall of the adjustment seat 442. The adjustment bar 441 is set through the multiple adjustment seats 442 and is slidably connected to the inner wall of the adjustment seat 442. The first transmission box 443 and the second transmission box 444 are fixedly connected at the connection between the horizontal section and the vertical section of the mud suction pipe 422. A protective sleeve 445 is fixedly connected between the top of the second transmission box 444 and the bottom of the walking frame 41. A drive motor 446 is fixedly installed on the top of the walking frame 41. The drive motor 446 is driven by a drive rod 447. The bottom end of the drive rod 447 is set through the protective sleeve 445, and the drive rod 447 is used to drive the adjustment bar 441 to move laterally.

[0062] When it is necessary to adjust the state of the densified mud-removing claws 433, the drive motor 446 above the walking frame 41 is started. The drive motor 446 drives the drive rod 447 to rotate. The drive rod 447 drives the adjusting bar 441 to move laterally through the transmission structure inside the first transmission box 443 and the second transmission box 444. The adjusting bar 441 moves smoothly under the guidance of multiple adjusting seats 442, thereby driving multiple densified mud-removing claws 433 to rotate and completing the switching of the working state; Fourth step: When the walking frame 41 moves, the drive motor 446 works synchronously to ensure that the mud-removing operation continues.

[0063] The adjustment component 44 uses a drive motor 446 as its power source, ensuring stable transmission and sufficient power. This effectively drives the densified mud-removing claw 433, guaranteeing the reliability of state switching. The first transmission box 443 and the second transmission box 444 allow for flexible switching of the driving direction, adapting to the structural layout of the device and reducing space occupation. The protective sleeve 445 protects the drive rod 447, preventing sewage and sludge from corroding it and extending the equipment's service life. Multiple adjustment seats 442 guide and support the adjustment bar 441, ensuring the smoothness of the lateral movement of the adjustment bar 441, preventing jamming, and improving the smoothness of state switching. The overall transmission structure is compact and integrated into the walking frame 41 and the mud-removing pipe 422, without occupying additional space and ensuring the integrity of the device.

[0064] Furthermore, multiple sets of toothed grooves 4411 are provided below the adjusting bar 441. A quarter gear 4412 is installed at the end of the encrypted mud-removing claw 433, and the quarter gear 4412 is meshed with the toothed groove 4411. The adjusting bar 441 is provided with a front-to-back through limiting groove 4413. A limiting block 4414 is fixedly installed on the inner wall of the adjusting seat 442 and slidably disposed in the limiting groove 4413. An internal threaded sleeve 4431 is rotatably connected to the inner wall of the first transmission box 443. A screw 4432 is threadedly connected to the inner wall of the internal threaded sleeve 4431. The end of the screw 4432 extends outward and is fixedly connected to the end of the adjusting bar 441. The other end of the internal threaded sleeve 4431 and the bottom end of the drive rod 447 both extend toward the inside of the second transmission box 444 and are fixedly fitted with a bevel gear 4471. The two bevel gears 4471 are meshed together.

[0065] The drive motor 446 drives the drive rod 447 to rotate, and the bevel gear 4471 at the bottom of the drive rod 447 rotates synchronously. Through the meshing transmission of the two bevel gears 4471, the internal threaded sleeve 4431 in the first transmission box 443 is driven to rotate. When the internal threaded sleeve 4431 rotates, the threaded drive screw 4432 on its inner wall moves axially, thereby driving the adjusting bar 441 to move laterally. When the adjusting bar 441 moves, the tooth groove 4411 below it meshes with the quarter gear 4412 at the end of the densified mud-removing claw 433, driving the densified mud-removing claw 433 to rotate. During the movement of the adjusting bar 441, the limiting groove 4413 slides with the limiting block 4414 on the inner wall of the adjusting seat 442 to ensure the accuracy of the moving direction of the adjusting bar 441.

[0066] Furthermore, a drive wheel 4461 is fitted on the outer side of the output end of the drive motor 446, and the top ends of the two drive rods 447 pass through the walking frame 41 and are fixedly fitted with driven wheels 4472. The drive wheel 4461 and the two driven wheels 4472 are connected by belt drive. A protective cover is fixedly installed on the outer side of the drive wheel 4461 and the driven wheels 4472. The protective cover is fixedly connected to the top of the walking frame 41, and the drive motor 446 is fixedly installed on the top of the protective cover.

[0067] Start the drive motor 446. The output of the drive motor 446 drives the drive wheel 4461 to rotate. The drive wheel 4461 drives the two driven wheels 4472 to rotate synchronously via a belt. The two driven wheels 4472 drive the corresponding drive rods 447 to rotate, which in turn drives the adjusting bars 441 below the two mud suction pipes 422 to move synchronously through the transmission structure. The two adjusting bars 441 synchronously drive the densified mud-removing claws 433 on both sides to rotate, completing the state switch and synchronously performing mud removal operation.

[0068] A highly efficient wastewater treatment method involving flocculation and sedimentation includes the following steps:

[0069] Step 1: Coagulation pretreatment. The wastewater to be treated is introduced into the mixing tank 5. A preset dose of coagulant is added to the mixing tank 5. The mixing mechanism in the mixing tank 5 is started to make the wastewater and coagulant fully mixed to form a preliminary floc suspension.

[0070] Step 2: Folded plate flocculation reaction. The floc suspension obtained in Step 1 is passed into the folded plate flocculation tank 1. The vortex and turbulence generated by the folded plate structure in the folded plate flocculation tank 1 promote the further collision and aggregation of the initial flocs to form large floc particles.

[0071] Step 3: Horizontal sedimentation separation. The wastewater after flocculation reaction is discharged into horizontal sedimentation tank 2. The wastewater flows slowly along the channels on both sides of the partition wall 21 inside the horizontal sedimentation tank 2. Under the action of gravity, the flocs gradually settle to the bottom wall inside the horizontal sedimentation tank 2, realizing the initial separation of solid and liquid. The supernatant flows to the end of the horizontal sedimentation tank 2 away from the baffle flocculation tank 1.

[0072] Step 4: Deep purification by sand filtration. The supernatant from Step 3 enters the interior of the suspended sand filter 3 through the overflow hole on the outside of the suspended sand filter 3, passes through the filled sand layer 31, and uses the interception and adsorption effect of the sand layer 31 to remove the fine suspended particles remaining in the supernatant. The purified water is discharged through the drain pipe inserted in the sand layer 31.

[0073] Step 5: Sludge extraction and cleaning. While or after sedimentation in Step 3, start the mobile sludge pumping unit 4 and the external self-priming sludge pump to pump the sludge to the designated sludge treatment area.

[0074] Example: This example is based on the above-mentioned high-efficiency wastewater treatment flocculation sedimentation device, with the addition of a data acquisition module and a control system to achieve automated and precise operation of the device. The specific structure and control process are as follows:

[0075] I. System Composition

[0076] The data acquisition module, located inside the horizontal flow sedimentation tank 2, includes four sets of sludge thickness sensors and two sets of water turbidity sensors. The sludge thickness sensors are evenly installed on the bottom wall of the horizontal flow sedimentation tank 2, corresponding to the sedimentation channels on both sides of the central partition wall 21. One sensor is placed every 5 meters along the length of each channel to collect real-time sludge thickness data in different areas of the tank bottom. The water turbidity sensors are installed in the middle and at the outlet of the horizontal flow sedimentation tank 2 to monitor changes in water turbidity during sedimentation and to determine the sedimentation effect. All sensors are electrically connected to the controller of the control system via signal cables to achieve real-time transmission of the acquired information.

[0077] The execution module is based on the existing mobile sludge pumping unit 4, including the mobile drive component of the mobile frame 41, the drive motor 446 and the external self-priming sludge pump. It receives instructions from the controller and completes the start and stop of the mobile frame 41, the adjustment of the mobile speed, the state switching action of the densified sludge claws 433, and the opening and closing of the external self-priming sludge pump.

[0078] Control system: A PLC controller is used as the core control unit. The sludge thickness threshold and water turbidity compliance threshold are pre-stored. The threshold for thin sludge layer can be set to ≤5cm, the threshold for medium sludge layer is 5-15cm, the threshold for thick sludge layer is ≥15cm, and the threshold for water turbidity compliance is set to ≤10NTU. The controller receives real-time data from the acquisition module, compares it with the preset threshold, generates control commands, and sends them to the execution module.

[0079] II. Control Process

[0080] Start-up and information acquisition: After the device is started, the acquisition module starts simultaneously. The sludge thickness sensor collects sludge thickness data in each area of ​​the bottom wall of the horizontal sedimentation tank 2 in real time, and the water turbidity sensor collects water turbidity data in real time. All data are continuously transmitted to the PLC controller.

[0081] External self-priming sludge pump start-up control: After receiving sludge thickness data, the controller first determines whether there is an area that needs sludge pumping, i.e., a medium or thick sludge layer area with a sludge thickness ≥ 5cm. If there is at least one such area, the controller immediately issues a command to start the external self-priming sludge pump, so that the main pipe 421 and the sludge pumping pipe 422 form a negative pressure sludge pumping channel, preparing for subsequent sludge pumping operations; if the sludge thickness in the entire area is < 5cm, the sludge pumping threshold has not been reached, and the sludge pump will not be started temporarily.

[0082] Walking frame 41 walking control: The controller determines the sludge distribution area based on the data collected by the sludge thickness sensor and generates walking instructions for the walking frame 41: If the sludge thickness in a certain area reaches or exceeds the thick sludge layer threshold, the walking frame 41 is instructed to move to the area at a low speed of 0.2 m / s. If the sludge thickness is between the thin sludge layer threshold and the thick sludge layer threshold, the walking frame 41 is instructed to move at a medium speed of 0.5 m / s. If the sludge thickness is lower than the thin sludge layer threshold, the walking frame 41 is instructed to move through the area at a fast speed of 1.0 m / s to reduce disturbance to the water body. The walking frame 41 moves smoothly via the slide rail 22. During the movement, the controller receives sensor data in real time and dynamically adjusts the walking speed.

[0083] State switching control of the encrypted sludge removal claw 433: The controller generates a state switching command for the encrypted sludge removal claw 433 based on the sludge thickness data. The specific switching process is as follows:

[0084] Step 1: Start the drive motor 446. The output of the drive motor 446 drives the drive wheel 4461 to rotate.

[0085] Step 2: Drive wheel 4461 drives two driven wheels 4472 to rotate synchronously via belt;

[0086] Step 3: The two driven wheels 4472 drive the corresponding drive rods 447 to rotate, and then drive the internal threaded sleeve 4431 to rotate through the meshing of the bevel gears 4471 inside the first transmission box 443 and the second transmission box 444. The internal threaded sleeve 4431 drives the screw 4432 to move axially, and finally synchronously drives the adjusting strips 441 below the two mud suction pipes 422 to move laterally.

[0087] Step 4: The two adjusting bars 441 drive the two sides of the dense mud-removing claws 433 to rotate synchronously through the meshing of the toothed grooves 4411 and the quarter gear 4412, completing the state switching: When the sludge thickness is ≥15cm thick, the dense mud-removing claws 433 switch to the vertical mud-removing state, working together with the first mud-removing claw 431 and the second mud-removing claw 432 to achieve high-density mud removal and thoroughly break up the compacted sludge; when the sludge thickness is ≤5cm thin sludge layer, the dense mud-removing claws 433 switch to the horizontal storage state, using only the first mud-removing claw 431 and the second mud-removing claw 432 for low-disturbance mud removal, avoiding excessive disturbance to the water body.

[0088] Closed-loop adjustment: During the sludge removal process, the acquisition module continuously collects sludge thickness and water turbidity data. If the sludge thickness in a certain area drops below the thin sludge layer threshold, the controller commands the encrypted sludge removal claw 433 to switch to the storage state and controls the walking frame 41 to speed up. At the same time, if this area is the last area to be sludged, a command is issued to shut down the external self-priming sludge pump. If the water turbidity exceeds the standard threshold, the controller commands the walking frame 41 to decelerate and simultaneously suspends the sludge removal action and sludge pump operation. Operation is resumed after the water stabilizes and the turbidity is ≤10NTU. If an area with a sludge thickness ≥5cm is added during the inspection, the controller immediately restarts the sludge pump, adjusts the speed of the walking frame 41 to the corresponding gear, and starts the sludge removal operation to ensure the sedimentation effect.

[0089] Through the system linkage control of the acquisition module and the execution module, the walking speed of the walking frame 41 and the state of the densified mud-removing claw 433 are precisely and adaptively adjusted. This can ensure thorough mud removal for thick sludge layers and reduce water disturbance for thin sludge layers. It solves the problems of poor adaptability and large disturbance caused by the reliance on manual control in existing devices. At the same time, the real-time monitoring of water turbidity and dynamic adjustment of the operation status further improve the sedimentation effect and the stability of the effluent water quality, and enhance the automation level and operational reliability of the device.

[0090] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency wastewater treatment flocculation and sedimentation device, characterized in that, include: Folded plate flocculation tank (1): Wastewater is introduced into the folded plate flocculation tank (1) for flocculation. The horizontal flow sedimentation tank (2) is located at the outlet end of the folded plate flocculation tank (1). The wastewater after flocculation is discharged into the horizontal flow sedimentation tank (2) for sedimentation. Several sets of suspended sand filters (3) are integrally cast with the inner wall of the horizontal sedimentation tank (2) and located at the end away from the folded plate flocculation tank (1). The other end of the suspended sand filter (3) is equipped with a support rod (32), and the end of the support rod (32) is fixedly installed on the inner wall of the horizontal sedimentation tank (2). The mobile sludge pumping unit (4) is located at the top of the horizontal flow sedimentation tank (2) and can move back and forth along the length of the horizontal flow sedimentation tank (2) to pump out the sludge deposited on the bottom wall of the horizontal flow sedimentation tank (2).

2. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 1, characterized in that, The suspended sand filter (3) has an overflow hole on its outer side, and the interior of the suspended sand filter (3) is filled with a sand layer (31). A drain pipe connected to the outside is inserted into the sand layer (31). The supernatant of the precipitated sewage enters the interior of the suspended sand filter (3) through the overflow hole, and is discharged through the drain pipe after being filtered by the sand layer (31). A stirring tank (5) is installed at the inlet end of the folded plate flocculation tank (1). The sewage is mixed with coagulant in the stirring tank (5) and then fed into the folded plate flocculation tank (1).

3. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 1, characterized in that, The inner wall of the horizontal sedimentation tank (2) is longitudinally cast with a partition wall (21), and the top of the horizontal sedimentation tank (2) is symmetrically laid with slide rails (22) along its length.

4. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 3, characterized in that, The walking sludge pumping unit (4) includes a walking frame (41) that is slidably mounted on the top of the horizontal flow sedimentation tank (2) via a slide rail (22), a rigid sludge pumping pipe (42) connected to the walking frame (41), a sludge-pulling claw assembly (43) for moving the sludge on the bottom wall of the horizontal flow sedimentation tank (2), and an adjustment component (44) that is connected to the sludge-pulling claw assembly (43) in a transmission manner.

5. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 4, characterized in that, The rigid sludge suction pipe fitting (42) includes a main pipe (421) connected to an external self-priming sludge pump and a sludge suction pipe (422) extending into the horizontal flow sedimentation tank (2). The main pipe (421) is installed above the walking frame (41). The two sludge suction pipes (422) are symmetrically arranged with a central partition wall (21), and the sludge suction pipes (422) are L-shaped. The top of the vertical section of the sludge suction pipe (422) is connected to the main pipe (421), and the horizontal section of the sludge suction pipe (422) is parallel to the horizontal flow sedimentation tank. (2) The inner bottom wall is provided, and multiple first mud-draining cylinders (423) and multiple second mud-draining cylinders (424) are respectively provided on both sides of the horizontal section of the mud-draining pipe (422). The ends of the first mud-draining cylinders (423) and the second mud-draining cylinders (424) away from the mud-draining pipe (422) are both inclined downwards. The outer sides of the first mud-draining cylinders (423) and the second mud-draining cylinders (424) are both provided with mud-draining holes (425), and the multiple first mud-draining cylinders (423) and the multiple second mud-draining cylinders (424) are arranged alternately.

6. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 5, characterized in that, The mud-removing claw assembly (43) includes a first mud-removing claw (431) fixedly installed at the bottom of the first mud-dredging cylinder (423), a second mud-removing claw (432) fixedly installed at the bottom of the second mud-dredging cylinder (424), and a plurality of dense mud-removing claws (433) installed below the horizontal section of the mud-dredging pipe (422). The dense mud-removing claws (433) are located between adjacent first mud-removing claws (431) and second mud-removing claws (432), and the adjusting component (44) is connected to the plurality of dense mud-removing claws (433) for driving the plurality of dense mud-removing claws (433) to rotate, thereby realizing the switching between vertical mud-removing operation state and horizontal storage state.

7. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 6, characterized in that, The adjustment assembly (44) includes an adjustment bar (441), multiple adjustment seats (442), a first transmission box (443), and a second transmission box (444). The multiple adjustment seats (442) are fixedly installed at the bottom of the horizontal section of the mud-pushing pipe (422), and the ends of the dense mud-pushing claws (433) are rotatably connected to the inner wall of the adjustment seats (442). The adjustment bar (441) passes through the multiple adjustment seats (442) and is slidably connected to the inner wall of the adjustment seats (442). The first transmission box (443) and the second transmission box (444) are... 44) A protective sleeve (445) is fixedly connected between the top of the second transmission box (444) and the bottom of the walking frame (41), and a drive motor (446) is fixedly installed on the top of the walking frame (41). The drive motor (446) is connected to a drive rod (447), the bottom end of the drive rod (447) is set through the protective sleeve (445), and the drive rod (447) is used to drive the adjusting bar (441) to move laterally.

8. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 7, characterized in that, The adjusting bar (441) has multiple sets of toothed grooves (4411) below it. The end of the encrypted mud-removing claw (433) is equipped with a quarter gear (4412), and the quarter gear (4412) meshes with the toothed grooves (4411). The adjusting bar (441) has a front-to-back through limiting groove (4413). The inner wall of the adjusting seat (442) is fixedly equipped with a limiting block (4414) that is slidably disposed in the limiting groove (4413). The first transmission box (443) The inner wall of the gearbox (444) is rotatably connected to an internal threaded sleeve (4431). A screw (4432) is threaded onto the inner wall of the internal threaded sleeve (4431). The end of the screw (4432) extends outward and is fixedly connected to the end of the adjusting bar (441). The other end of the internal threaded sleeve (4431) and the bottom end of the drive rod (447) both extend toward the interior of the second transmission box (444) and are fixedly fitted with bevel gears (4471). The two bevel gears (4471) are meshed together.

9. The high-efficiency wastewater treatment flocculation and sedimentation device according to claim 7, characterized in that, A drive wheel (4461) is fitted on the outer side of the output end of the drive motor (446). The top ends of the two drive rods (447) pass through the walking frame (41) and are fixedly fitted with driven wheels (4472). The drive wheel (4461) and the two driven wheels (4472) are connected by belt drive. A protective cover is fixedly installed on the outer side of the drive wheel (4461) and the driven wheels (4472). The protective cover is fixedly connected above the walking frame (41), and the drive motor (446) is fixedly installed on the top of the protective cover.

10. A high-efficiency wastewater treatment flocculation and sedimentation method, employing the high-efficiency wastewater treatment flocculation and sedimentation device according to any one of claims 1-9, characterized in that, The method includes the following steps: Step 1: Coagulation pretreatment. The wastewater to be treated is introduced into the mixing tank (5). A preset dose of coagulant is added to the mixing tank (5). The mixing mechanism in the mixing tank (5) is started to make the wastewater and coagulant fully mixed to form a preliminary floc suspension. Step 2: Folded plate flocculation reaction. The floc suspension obtained in Step 1 is passed into the folded plate flocculation tank (1). The vortex and turbulence generated by the folded plate structure in the folded plate flocculation tank (1) are used to promote further collision and coagulation of the initial flocs to form large flocs. Step 3: Horizontal sedimentation separation. The wastewater after flocculation reaction is discharged into the horizontal sedimentation tank (2). The wastewater flows slowly along the channels on both sides of the partition wall (21) inside the horizontal sedimentation tank (2). Under the action of gravity, the flocs gradually settle to the bottom wall inside the horizontal sedimentation tank (2), realizing the initial separation of solid and liquid. The supernatant flows to the end of the horizontal sedimentation tank (2) away from the folded plate flocculation tank (1). Step 4: Deep purification by sand filtration. The supernatant from step 3 enters the interior of the suspended sand filter (3) through the overflow hole on the outside of the suspended sand filter (3), passes through the filled sand layer (31), and uses the interception and adsorption effect of the sand layer (31) to remove the fine suspended particles remaining in the supernatant. The purified water is discharged through the drain pipe inserted in the sand layer (31). Step 5: Sludge extraction and cleaning. While or after sedimentation in Step 3, start the walking sludge pumping unit (4) and the external self-priming sludge pump to pump the sludge to the designated sludge treatment area.

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