A sedimentation tank bottom plate partitioned sludge discharge device and a sludge discharge method thereof

Abstract

This invention discloses a sedimentation tank bottom plate partitioning sludge loosening and sludge discharge device and its discharge method, belonging to the technical field of sedimentation tank sludge discharge equipment. The partitioning component divides the bottom of the sedimentation tank into multiple sludge zones. A spiral conveying roller is installed in the conveying chamber of the partitioning component, with staggered wastewater inlets on both sides. Multiple scraper blades in the sludge zones are connected by connecting rods. The scraper blades have notches at both ends and a cutting section at the lower edge. A reduction motor drives a power disc to rotate. An eccentric pin on the power disc cooperates with a guide groove on the power rod, causing the scraper blades to reciprocate and loosen the sludge. Simultaneously, the toothed ring on the lower surface of the power disc drives the spiral conveying roller to rotate via a branch drive component. The notches ensure that the scraper blades remain partially connected when passing the wastewater inlets and periodically change the flow area, allowing the loosened sludge to enter the conveying chamber in batches and be discharged via the spiral conveyor, discharge branch pipe, and discharge main pipe. This invention can implement localized sludge loosening and directional sludge discharge, reducing disturbance to the upper water body, dead zones in sludge discharge, and loss of clean water.

Description

Technical Field

[0001] This invention relates to the field of sedimentation tank sludge removal equipment technology, specifically to a sedimentation tank bottom plate zoned sludge loosening and sewage removal device and its sewage removal method. Background Technology

[0002] During the operation of a sedimentation tank, suspended solids in the water are deposited at the bottom of the tank under the action of gravity and form a sludge layer. Due to the differences in flow patterns, sedimentation rates and sludge moisture content at different locations in the sedimentation tank, the sludge at the bottom of the tank often exhibits uneven thickness, local compaction, and adhesion and caking. Relying solely on the suction effect formed by the sewage pipe or sewage pump, it is usually difficult to move the high-concentration sludge far from the sewage outlet to the sewage channel stably, which easily leads to sewage dead zones.

[0003] To improve sludge removal capabilities, existing technologies often employ scrapers, agitators, or flushing structures to disturb the sludge at the bottom of the tank. However, scraping or large-scale flushing can easily cause the deposited sludge to resuspend and spread to the upper water layer, affecting the sedimentation effect. When multiple sludge discharge outlets are operating simultaneously, the flow resistance of each discharge branch is different, which can easily lead to a large discharge volume at the near end and insufficient sludge discharge at the far end, resulting in water loss and a reduction in the average concentration of discharged sludge.

[0004] In view of this, and to address the above problems, a sedimentation tank bottom plate partition loosening and sludge discharge device and its discharge method are proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a sedimentation tank bottom plate partition loosening and sludge discharge device and its discharge method, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device, comprising a sedimentation tank, wherein a partitioning component is provided at the bottom of the sedimentation tank, the partitioning component divides the bottom of the sedimentation tank into multiple sludge zones and forms a conveying chamber communicating with each of the sludge zones; a sludge scraping component is provided in each of the sludge zones, a spiral conveying roller is provided in the conveying chamber, and the conveying chamber is provided with a sewage inlet and a sewage outlet; the sludge scraping component is connected to the reciprocating output end of a drive component, the spiral conveying roller is drivenly connected to the rotating output end of the drive component, and the drive component is configured to convert the same rotational power into the reciprocating sludge loosening motion of the sludge scraping component and the rotational conveying motion of the spiral conveying roller respectively; the sewage outlet is connected to the sewage discharge component.

[0007] Preferably, the separation component includes a first isolation zone and a third isolation zone located on both sides, and a plurality of second isolation zones located between them. A sludge zone is formed between adjacent isolation zones, and the sludge zones are arranged sequentially from left to right along the transverse side of the sedimentation tank as a first sludge zone to a seventh sludge zone.

[0008] Preferably, the sewage inlet is provided on the right side of the isolation belt one, the left side of the isolation belt three, and the left and right sides of the isolation belt two, and the sewage inlets on the left and right sides of the isolation belt two are staggered along the extension direction of the conveying cavity; the top sides of the isolation belt one, isolation belt two and isolation belt three are provided with inclined portions.

[0009] Preferably, the sludge scraping assembly includes a connecting rod and a plurality of sludge scraping blades spaced apart along the connecting rod. The lower edge of each sludge scraping blade is provided with a cutting portion, and both ends are respectively provided with notches corresponding to the sewage inlet. The notches are used to keep the sewage inlet at least partially connected when the sludge scraping blade passes through the sewage inlet.

[0010] Preferably, the drive assembly includes a drive rod, a drive disk, and an eccentric pin. The eccentric pin is offset from the rotation center of the drive disk and slides with a guide groove on the drive rod via a sleeve. The lower surface of the drive disk is provided with a toothed ring. The eccentric pin constitutes the reciprocating output end, and the toothed ring constitutes the rotary output end.

[0011] Preferably, the drive assembly is connected to the spiral conveying roller via a branch drive component; the branch drive component includes a transverse drive rod, a spiral conveying drive shaft, and a support base, one end of the transverse drive rod is reversibly engaged with the toothed ring, and the other end is reversibly engaged with the spiral conveying drive shaft, which is connected to the spiral conveying roller.

[0012] Preferably, the sludge zones are arranged from left to right along the transverse direction of the sedimentation tank as a first sludge zone to a seventh sludge zone; the drive components corresponding to the first to sixth sludge zones are provided with only one set of branch drive components on the left side of the power disk, which respectively drive the spiral conveying rollers located on the left side of the corresponding sludge zone; the drive components corresponding to the seventh sludge zone are provided with a set of branch drive components on the left and right sides of the power disk, which respectively drive the spiral conveying rollers on both sides of the seventh sludge zone, so that any spiral conveying roller is powered by only one transverse transmission rod.

[0013] Preferably, the sewage discharge assembly includes a sewage branch pipe, a sewage valve, a sludge collection chamber, a sludge pipe one, a sludge pipe two, a clamp, and a main sewage discharge pipe; the sewage branch pipe is connected to the corresponding sludge collection chamber through the sewage valve, the sludge collection chamber is connected to the main sewage discharge pipe through the sludge pipe one and the sludge pipe two, and the sludge pipe one and the sludge pipe two are detachably connected by the clamp; the end of the main sewage discharge pipe is provided with a flange for connection to an external sludge pump, the sewage discharge assembly is supported by a support and located inside a pipe protective shell, and the pipe protective shell is provided with a detachable top plate. This invention also provides a method for zoned loosening and sludge removal from the bottom plate of a sedimentation tank, comprising the following steps: S1. Determine the target sludge zone from multiple sludge zones and open the sewage discharge passage corresponding to the target sludge zone; S2. Start the drive component corresponding to the target sludge zone to convert the same rotational power into the reciprocating motion of the sludge scraping component and the rotational motion of the screw conveyor roller respectively; S3. Use the scraping assembly to locally loosen the deposited sludge in the target sludge zone, and let the loosened sludge enter the conveying chamber through the sewage inlet. S4. The sludge entering the conveying chamber is conveyed to the sewage outlet by the spiral conveying roller, and then discharged through the sewage discharge assembly; S5. After reaching the discharge endpoint, stop the drive component corresponding to the target sludge zone and close the corresponding discharge passage, then switch to the next target sludge zone.

[0014] Preferably, each sludge zone is discharged sequentially in a preset order, or in batches according to the interval between adjacent sludge zones; during the discharge process, the discharge endpoint of the target sludge zone is determined based on at least one of the discharge time, discharge flow rate, concentration of the discharged sludge-water mixture, and load of the geared motor.

[0015] The present invention has the following beneficial effects: This is a sedimentation tank bottom plate partition loosening and sewage discharge device and sewage discharge method. The partition component divides the bottom of the tank into multiple sludge zones, which can perform local loosening and partition sewage discharge in the target area, limit the lateral spread of sludge, and reduce the disturbance to the upper water body. This is a sedimentation tank bottom plate partition loosening and sewage discharge device and sewage discharge method. The cutting part of the lower edge of the scraper can break the compacted and hardened sludge. The notches at both ends of the scraper can keep the sewage inlet at least partially connected when the scraper passes by, reducing complete blockage and sludge trapping. This is a sedimentation tank bottom plate partition loosening and sewage discharge device and sewage discharge method. The sewage inlets on both sides of the isolation zone are staggered along the conveying direction, which can disperse the sludge inlet positions of adjacent sludge zones and reduce the probability of local concentrated sludge inlet and blockage in the conveying chamber. This is a sedimentation tank bottom plate partition loosening and sewage discharge device and its sewage discharge method. The power disc outputs reciprocating power and rotational power at the same time, so that the loosening action of the scraper blade and the conveying action of the spiral conveyor roller are synchronized, reducing the number of power components and shortening the time that the loosened sludge stays at the bottom of the tank. This is a sedimentation tank bottom plate partition loosening and sewage discharge device and its sewage discharge method. The spiral conveying roller directs the mud-water mixture along the closed or semi-closed conveying chamber to the sewage branch pipe, and discharges it in coordination with the external sludge pump, which is conducive to improving the sludge discharge capacity far away from the main sewage discharge pipe. This invention relates to a sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device and its sewage discharge method. Each sewage discharge branch is switched through a sewage discharge valve, which can sequentially treat different sludge zones, reducing the uneven distribution of negative pressure and ineffective discharge of clean water caused by simultaneous discharge from multiple zones. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure after the top plate of the pipe protective shell has been removed according to the present invention; Figure 3 This is a schematic diagram of the sedimentation tank, separation components, and sludge zone of the present invention; Figure 4 This is a schematic diagram showing the arrangement of the sludge scraping assembly in each sludge zone of the present invention; Figure 5 This is a top view of the structure of the present invention; Figure 6 This is a side view of the drive assembly and spiral conveyor roller of the present invention. Figure 7 This is a schematic diagram of the transmission relationship between the spiral conveyor roller and the power disc in this invention; Figure 8 This is a schematic diagram of the sludge scraping assembly and the separating assembly within a single sludge zone of the present invention; Figure 9 This is an exploded view of the sludge scraping assembly, the second isolation belt, and the spiral conveying roller of the present invention; Figure 10 This is a schematic diagram of the scraper, cutting part, and connecting structure of the present invention; Figure 11 for Figure 5 Enlarged structural diagram at point A; Figure 12 for Figure 5 Enlarged structural diagram at point B; Figure 13 for Figure 5 A magnified structural diagram at point C.

[0017] The components include: 1. Sedimentation tank; 2. Separation assembly; 201. Separation zone one; 202. Separation zone two; 203. Separation zone three; 204. Wastewater inlet; 205. Wastewater outlet; 206. Inclined section; 3. Sludge zone; 4. Sludge scraping assembly; 401. Sludge scraper; 402. Notch; 403. Cutting section; 404. Connecting rod; 405. Sludge scraper connecting block; 5. Drive assembly; 501. Power rod; 5011. Guide groove; 502. Power disc; 5021. Toothed ring; 503. Drive shaft. 504. Gear motor; 505. Coupling; 506. Eccentric pin; 507. Sleeve; 6. Screw conveyor roller; 7. Branch drive component; 701. Transverse transmission rod; 702. Screw conveyor drive shaft; 703. Support base; 8. Sewage branch pipe; 9. Sewage valve; 10. Sewage collection chamber; 11. Sludge pipe one; 12. Sludge pipe two; 13. Clamp; 14. Main sewage pipe; 15. Support; 16. Pipe protective shell; 1601. Top plate; 17. Flange; 18. Connecting plate; 19. Fixing frame. Detailed Implementation

[0018] 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.

[0019] Example 1: Zoned mud loosening and sewage discharge device; like Figures 1 to 5 As shown, a partition assembly 2 is provided at the bottom of the sedimentation tank 1. The partition assembly 2 includes a first partition 201 and a third partition 203 located on both sides in the lateral direction, and a plurality of second partitions 202 located between them. Each partition extends along the second direction, and a sludge zone 3 is formed between adjacent partitions. In this embodiment, seven sludge zones 3 are arranged sequentially from left to right along the first direction, and are respectively denoted as the first sludge zone to the seventh sludge zone, which correspond to eight conveying cavities for installing the spiral conveying roller 6. Each partition is connected to the fixed frame 19 through a connecting plate 18, thereby limiting the lateral displacement and vertical tilting of the partition relative to the bottom plate of the sedimentation tank 1.

[0020] Isolation belt 1 201, isolation belt 202 and isolation belt 3 203 all form a conveying cavity that can accommodate the spiral conveying roller 6. Multiple sewage inlets 204 are opened on the right side of isolation belt 1 201, the left side of isolation belt 3 203 and the left and right sides of isolation belt 2 202 respectively. The sewage inlets 204 are arranged at intervals along the second direction. The sewage inlets 204 on both sides of isolation belt 2 202 are staggered along the second direction so that the mud-water mixture from the adjacent sludge zone 3 will not enter the conveying cavity at the same axial position at the same time.

[0021] The lower part of the sewage inlet 204 is inclined, and the inclination gradually decreases from the sludge zone 3 towards the inside of the conveying chamber. The mud-water mixture formed by the push or disturbance of the scraper 401 enters the conveying chamber along the sewage inlet 204 under the action of gravity and local flow. The inclination and the edge of the sewage inlet 204 are rounded or chamfered (not shown in the figure) to reduce the probability of fibrous debris getting stuck and hard particles being trapped.

[0022] Among them, inclined sections 206 are provided at the top of isolation zone 1 201, isolation zone 202 and isolation zone 3 203. This can reduce the amount of sludge falling to the top of the isolation zone and allow the sludge to fall into the interior of the sludge zone 3, which is convenient for centralized treatment of the sludge.

[0023] Figures 8 to 10 As shown, a set of scraper components 4 is provided in each sludge zone 3. The scraper component 4 includes a connecting rod 404, a scraper plate connecting block 405 and multiple scraper plates 401. The connecting rod 404 extends along the second direction, and the multiple scraper plates 401 are spaced apart along the length direction of the connecting rod 404 and fixed by the scraper plate connecting block 405. The scraper plate 401 spans the corresponding sludge zone 3 along the first direction, and a working gap is maintained between its lower edge and the bottom plate of the sedimentation tank 1 to allow the scraper plate 401 to move.

[0024] The lower edge of the scraper 401 is provided with multiple toothed or blade-shaped cutting sections 403. When the connecting rod 404 drives the scraper 401 to reciprocate, the cutting sections 403 repeatedly enter the surface layer or the hardened layer of deposited sludge, dividing the continuous hardened sludge into smaller sludge pieces and separating them from the bottom plate. Notches 402 are provided at both ends of the scraper 401, and the notches 402 at least partially overlap with the sewage inlet 204 on the corresponding isolation zone in the height direction. When the scraper 401 moves to the sewage inlet 204, the main body of the scraper 401 partially blocks the sewage inlet 204, while the notches 402 still provide a sludge passage gap, so that the sewage inlet 204 is not completely closed.

[0025] The above structure enables the scraper 401 to periodically change the effective flow area of ​​the sewage inlet 204 when it reciprocates: when the scraper 401 moves away from the sewage inlet 204, the sewage inlet 204 has a larger effective flow area; when the scraper 401 passes the sewage inlet 204, the notch 402 retains a smaller but continuous effective flow area. As a result, the loosened sludge enters the conveying chamber in batches and continuously, avoiding an excessive instantaneous sludge volume after the scraper leaves.

[0026] like Figure 6 , Figure 7 , Figure 11 and Figure 12As shown, the drive assembly 5 is located at the end of the sedimentation tank 1 away from the sewage branch pipe 8. The output end of the geared motor 504 is connected to the transmission shaft 503 through the coupling 505. The transmission shaft 503 is coaxially connected to the power disk 502, so that the power disk 502 rotates continuously around the transmission shaft 503. The geared motor 504 is preferably located in a sealed protective box for maintenance and to reduce sewage corrosion.

[0027] An eccentric pin 506 is eccentrically mounted on the upper part of the power disc 502. The distance between the eccentric pin 506 and the rotation center of the power disc 502 constitutes the eccentricity. A guide groove 5011 is provided at one end of the power rod 501 near the power disc 502, and a sleeve 507 outside the eccentric pin 506 is located in the guide groove 5011. When the power disc 502 rotates, the eccentric pin 506 revolves around the drive shaft 503, and the sleeve 507 rolls or slides in the guide groove 5011, pushing the power rod 501 to reciprocate in the second direction. The power rod 501 is fixedly connected to the connecting rod 404, so the connecting rod 404 drives multiple scraper blades 401 to reciprocate synchronously. The theoretical reciprocating stroke of the scraper blades 401 is about twice the eccentricity, which can be determined according to the length of the sludge zone, the distance between the inlet and outlet, and the allowable load.

[0028] A continuous toothed ring 5021 is provided on the lower surface edge of the power disk 502. The toothed ring 5021 is preferably constructed as an end face toothed ring centered on the drive shaft 503, so that it can input rotational power to the transverse drive rod 701 during the full rotation of the power disk 502. The branch drive member 7 includes the transverse drive rod 701, the screw conveyor drive shaft 702, and the support seat 703. The transverse drive rod 701 is rotatably supported by the support seat 703. One end of the transverse drive rod 701 near the power disk 502 is provided with a first reversing meshing transmission part that cooperates with the toothed ring 5021, and the other end is connected to the screw conveyor drive shaft 702 through a second reversing meshing transmission part. The first and second reversing meshing transmission parts can be mutually meshing bevel gears or spur gears to transmit torque between intersecting shafts.

[0029] The screw conveyor drive shaft 702 is connected to the corresponding screw conveyor roller 6. The screw conveyor roller 6 rotates in the conveying chamber of the isolation belt, pushing the mud-water mixture entering from the sewage inlet 204 to the sewage outlet 205 in the second direction. A conveying gap is maintained between the screw conveyor roller 6 and the inner wall of the conveying chamber. The function of the screw conveyor roller 6 is to generate axial propulsion, rather than relying on the change of the sealed volume to form a suction negative pressure.

[0030] like Figure 5 , Figure 11 and Figure 12As shown, each of the seven sludge zones 3 is equipped with a set of drive components 5. The drive components 5 corresponding to the first to sixth sludge zones have only one transverse transmission rod 701 on the left side of their power disk 502. Each transverse transmission rod 701 drives the spiral conveying roller 6 located in the left conveying cavity of the corresponding sludge zone. The drive components 5 corresponding to the seventh sludge zone have one transverse transmission rod 701 on each side of their power disk 502, which drives the spiral conveying roller 6 in the left and right conveying cavities of the seventh sludge zone, respectively. Thus, the seven sets of drive components 5 form eight independent spiral conveying power paths, which correspond one-to-one with the eight spiral conveying rollers 6. This ensures that each spiral conveying drive shaft 702 receives power input from only one transverse transmission rod 701, avoiding adjacent power disks 502 from driving the same spiral conveying roller 6.

[0031] like Figure 2 and Figure 13 As shown, the sewage outlet 205 is located at one end of the conveying chamber near the sewage discharge assembly and is connected to the sewage discharge branch pipe 8. A sewage discharge valve 9 is installed on the sewage discharge branch pipe 8, and its downstream is connected to the sludge collection chamber 10. The sludge collection chamber 10 is connected to the main sewage discharge pipe 14 via sludge pipe 11 and sludge pipe 22. Sludge pipe 11 and sludge pipe 22 are detachably connected by clamps 13 for disassembly, cleaning, and unblocking. The main sewage discharge pipe 14 is supported by a support 15, and its end is provided with a flange 17 for connecting to an external sludge pump or subsequent sludge treatment equipment.

[0032] The sewage branch pipe 8, sewage valve 9, sewage collection chamber 10, sludge pipe one 11, sludge pipe two 12 and sewage main pipe 14 are installed inside the pipe protective shell 16. The pipe protective shell 16 is equipped with a detachable top plate 1601. When the top plate 1601 is opened, the sewage valve 9, clamp 13 and the connection of each pipe can be inspected and maintained. When closed, it can reduce external collisions and the entry of debris.

[0033] Example 2: Zoned sewage discharge method; S1. Determine the target sludge zone. After sedimentation in sedimentation tank 1 for a period of time, determine the target sludge zone that needs to be discharged this time from the seven sludge zones 3 based on the preset discharge cycle, the historical sedimentation of each sludge zone 3, or the detection results of the external sludge interface. Close the discharge valve 9 on the non-target branch, open the discharge valve 9 corresponding to the target sludge zone, and put the external sludge pump in standby or running state.

[0034] S2. Establish synchronous power output and start the geared motor 504 corresponding to the target sludge zone to make the power disk 502 rotate. The power disk 502 drives the power rod 501 to reciprocate through the eccentric pin 506, sleeve 507 and guide groove 5011, and drives the corresponding spiral conveying roller 6 to rotate through the toothed ring 5021 and branch drive component 7. The same power disk 502 synchronously outputs reciprocating power and rotational power.

[0035] S3. Implement localized sludge loosening and batch sludge feeding. The power rod 501 drives the scraper 401 to move back and forth via the connecting rod 404. The cutting part 403 cuts open the plated sludge, and the surface of the scraper 401 pushes the loosened sludge closer to the isolation zones on both sides. When the scraper 401 passes the sewage inlet 204, the notch 402 keeps the sewage inlet 204 partially connected. After the scraper 401 leaves, the effective flow area of ​​the sewage inlet 204 increases, allowing the sludge-water mixture to enter the conveying chamber in batches.

[0036] S4. Implement directional conveying and discharge. The spiral conveyor roller 6 axially pushes the mud-water mixture entering the conveying chamber to the sewage outlet 205. The mud-water mixture passes through the sewage branch pipe 8, the sewage valve 9 and the sewage collection chamber 10 in sequence, and then enters the main sewage discharge pipe 14 through the sludge pipe 11 and the sludge pipe 2 12. The external sludge pump forms a pumping pressure difference in the main sewage discharge pipe 14 and works in conjunction with the axial pushing action of the spiral conveyor roller 6 to discharge the sludge.

[0037] S5. Determine the discharge endpoint and switch areas. When the target sludge area reaches the preset discharge time, or when the discharge flow rate, sludge-water mixture concentration, or the load of the geared motor 504 reaches the stop condition, stop the corresponding geared motor 504 and close the discharge valve 9. Then select the next sludge area and repeat steps S1 to S5. The seven sludge areas can be discharged sequentially from left to right, or they can be discharged in batches according to the interval between adjacent sludge areas.

[0038] Example 3: Structural parameters and optional methods; The number of scraper blades 401, the spacing between adjacent scraper blades 401, the tooth pitch of the cutting part 403, the size of the sewage inlet 204, and the eccentricity of the power disc 502 can be determined according to the size of the sedimentation tank, the viscosity of the sludge, the sand content, and the target sewage discharge cycle. In order to ensure that the scraper blades 401 still have the ability to pass through the sewage inlet 204, the minimum effective flow area formed by the overlap of the notch 402 and the sewage inlet 204 should be greater than zero, and preferably, the minimum effective flow area should be able to meet the needs of low-load continuous feeding of the screw conveyor roller 6.

[0039] When the sludge contains a lot of sand, fiber or other impurities, an elastic coupling and a torque-limiting clutch (not shown in the figure) can be set between the branch drive 7 and the screw conveyor drive shaft 702. When the resistance torque of the screw conveyor roller 6 exceeds the set value, the torque-limiting clutch slips or disengages, isolating the stalled conveying branch from the power input, while other non-stalled branches can still operate. The above-mentioned elastic coupling and torque-limiting clutch are optional protective structures and do not change the basic concept of the present invention of synchronously outputting reciprocating power and rotational power from the same power plate.

[0040] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0041] 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 sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device, comprising a sedimentation tank (1), characterized in that: The bottom of the sedimentation tank (1) is provided with a partition component (2), which divides the bottom of the sedimentation tank (1) into multiple sludge zones (3) and forms a conveying chamber that communicates with each of the sludge zones (3); each of the sludge zones (3) is provided with a sludge scraping component (4), and the conveying chamber is provided with a spiral conveying roller (6). The conveying chamber is provided with a sewage inlet (204) and a sewage outlet (205); the sludge scraping component (4) is connected to the reciprocating output end of the drive component (5), and the spiral conveying roller (6) is connected to the rotating output end of the drive component (5). The drive component (5) is configured to convert the same rotational power into the reciprocating sludge loosening motion of the sludge scraping component (4) and the rotating conveying motion of the spiral conveying roller (6); the sewage outlet (205) is connected to the sewage discharge component.

2. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 1, characterized in that: The separation component (2) includes a first isolation zone (201) and a third isolation zone (203) located on both sides, and a plurality of second isolation zones (202) located between them. A sludge zone (3) is formed between adjacent isolation zones. The sludge zone (3) is arranged from left to right along the transverse direction of the sedimentation tank (1) as the first sludge zone to the seventh sludge zone.

3. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 2, characterized in that: The sewage inlet (204) is provided on the right side of the isolation belt one (201), the left side of the isolation belt three (203), and the left and right sides of the isolation belt two (202). The sewage inlets (204) on the left and right sides of the isolation belt two (202) are staggered along the extension direction of the conveying chamber. Inclined portions (206) are provided on both sides of the top of the isolation belt one (201), isolation belt two (202), and isolation belt three (203).

4. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 1, characterized in that: The sludge scraping assembly (4) includes a connecting rod (404) and a plurality of sludge scraping plates (401) spaced apart along the connecting rod (404). The lower edge of the sludge scraping plate (401) is provided with a cutting part (403), and both ends are provided with notches (402) corresponding to the sewage inlet (204). The notches (402) are used to keep the sewage inlet (204) at least partially connected when the sludge scraping plate (401) passes through the sewage inlet (204).

5. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 1, characterized in that: The drive assembly (5) includes a power rod (501), a power disk (502), and an eccentric pin (506). The eccentric pin (506) is offset from the rotation center of the power disk (502) and slides in contact with the guide groove (5011) on the power rod (501) through a sleeve (507). The lower surface of the power disk (502) is provided with a toothed ring (5021). The eccentric pin (506) constitutes the reciprocating output end, and the toothed ring (5021) constitutes the rotating output end.

6. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 5, characterized in that: The drive assembly (5) is connected to the spiral conveying roller (6) via a branch drive component (7); the branch drive component (7) includes a transverse drive rod (701), a spiral conveying drive shaft (702) and a support base (703). One end of the transverse drive rod (701) is reversibly engaged with the toothed ring (5021), and the other end is reversibly engaged with the spiral conveying drive shaft (702). The spiral conveying drive shaft (702) is connected to the spiral conveying roller (6).

7. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 6, characterized in that: The sludge zone (3) is arranged from left to right along the lateral side of the sedimentation tank (1) as the first sludge zone to the seventh sludge zone; the drive components (5) corresponding to the first sludge zone to the sixth sludge zone are provided with a set of branch drive components (7) on the left side of the power disk (502) to drive the spiral conveying rollers (6) located on the left side of the corresponding sludge zone respectively; the drive components (5) corresponding to the seventh sludge zone are provided with a set of branch drive components (7) on the left and right sides of the power disk (502) to drive the spiral conveying rollers (6) on both sides of the seventh sludge zone respectively, so that any spiral conveying roller (6) is powered by only one transverse transmission rod (701).

8. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge device according to claim 1, characterized in that: The sewage discharge assembly includes a sewage branch pipe (8), a sewage valve (9), a sewage collection chamber (10), a sludge pipe one (11), a sludge pipe two (12), a clamp (13), and a sewage main pipe (14). The sewage branch pipe (8) is connected to the corresponding sewage collection chamber (10) through the sewage valve (9). The sewage collection chamber (10) is connected to the sewage main pipe (14) through the sludge pipe one (11) and the sludge pipe two (12). The sludge pipe one (11) and the sludge pipe two (12) are detachably connected through the clamp (13). The end of the sewage main pipe (14) is provided with a flange (17) for connecting to an external sludge pump. The sewage discharge assembly is supported by a support (15) and located inside a pipe protective shell (16). The pipe protective shell (16) is provided with a detachable top plate (1601).

9. A method for zoned sludge loosening and wastewater discharge from the bottom plate of a sedimentation tank implemented using the apparatus described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Determine the target sludge zone from multiple sludge zones (3) and open the sewage discharge passage corresponding to the target sludge zone; S2. Start the drive component (5) corresponding to the target sludge zone and convert the same rotational power into the reciprocating motion of the sludge scraping component (4) and the rotational motion of the spiral conveying roller (6); S3. The sludge scraping assembly (4) is used to loosen the deposited sludge in the target sludge area, and the loosened sludge enters the conveying chamber through the sewage inlet (204); S4. The sludge entering the conveying chamber is conveyed to the sewage outlet (205) by the spiral conveying roller (6), and then discharged through the sewage discharge assembly; S5. After reaching the discharge endpoint, stop the drive component (5) corresponding to the target sludge zone and close the corresponding discharge passage, and then switch to the next target sludge zone.

10. The sedimentation tank bottom plate partitioning sludge loosening and sewage discharge method according to claim 9, characterized in that: Each sludge zone (3) is discharged in sequence according to a preset order, or in batches according to the interval between adjacent sludge zones (3); during the discharge process, the discharge endpoint of the target sludge zone (3) is determined based on at least one of the discharge time, discharge flow rate, concentration of discharged sludge-water mixture and load of the geared motor (504).

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