Removal and method of heavy metals in sludge of sewage treatment plant

Abstract

The invention discloses a method and a device for removing heavy metals in sludge of a sewage treatment plant, and particularly relates to the field of sludge treatment equipment.The device comprises a treatment box, a partition plate is fixedly installed on the inner wall of the middle of the treatment box, supporting columns are fixedly installed on the two sides of the top of the treatment box, and a batching mechanism and a bulk mixing mechanism are arranged in the treatment box; the belt pulling plate drives the belt bearing plate to deviate upwards to hold up sludge, after the belt bearing plate drives the sludge to move upwards to a high position, the sludge falls into the other side of the partition plate, and the belt pulling plate downwards presses the top of the side plate to enable the belt bearing plate to deflect downwards to be fed into a sludge pile. A plurality of threaded lifting rods and a plurality of rotary stirring plate strips move up and down in a reciprocating mode to synchronously rotate, part of sludge and chemical drugs are stirred to be mixed, meanwhile, a co-location strip drives a pulling strip plate and a clamping plate to synchronously move downwards, and a discharging plate discharges the drugs through inclined areas on the two sides of the discharging plate; the mixing effect of the sludge and the chemical medicine is uniformly corresponding, and the efficient removal treatment effect of heavy metals in the sludge is ensured.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment equipment technology, and more specifically, to a method for removing heavy metals from sludge in wastewater treatment plants. Background Technology

[0002] Sludge is generated during urban life and the operation and maintenance of urban municipal facilities related to urban life activities. Based on its source, it can be divided into sewage treatment plant sludge, water supply plant sludge, drainage pipeline sludge, dredging silt, and construction mud, etc. Sludge from different sources has significantly different properties, and the corresponding treatment and disposal technologies and resource utilization pathways also vary. Furthermore, sludge often contains large amounts of heavy metals.

[0003] Traditionally, heavy metals in wastewater treatment plant sludge are removed by adding chemical agents to precipitate the heavy metals, thus achieving the purpose of treatment. However, in the current technology, the sludge is piled up in a concentrated manner during treatment. Due to the lack of a structure that can process the sludge in batches and evenly, most of the sludge cannot be mixed with chemical agents in a timely and effective manner, and the mixing is uneven. Meanwhile, existing technologies lack a structure that can treat chemical agents and sludge in combination, meaning that the mixing effect of sludge and chemical agents cannot be uniformly achieved, thus failing to guarantee the efficient removal of heavy metals from the sludge.

[0004] To address the aforementioned technical shortcomings, a solution is provided. Summary of the Invention

[0005] This invention provides a method for removing heavy metals from sludge in wastewater treatment plants, thereby solving the technical problems mentioned in the background art, such as the inability to maintain timely and effective mixing of sludge with chemical agents and uneven mixing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heavy metal removal device for sludge from a wastewater treatment plant, comprising a treatment tank, a partition fixedly installed on the inner wall of the middle part of the treatment tank, and support columns fixedly installed on both sides of the top of the treatment tank. The treatment tank is equipped with a batching mechanism and a mixing mechanism. The batching mechanism can lift and discharge the sludge in batches multiple times. The mixing mechanism can reciprocate up and down to stir the sludge and chemical agents, improving the uniformity of mixing. A uniform dispersing mechanism is provided on the top of the treatment tank, which can reciprocate to uniformly add chemical agents to achieve a uniform ratio of chemical agents to sludge.

[0007] In a preferred embodiment, the batching mechanism includes a motor fixedly installed on the top of a support column, a reciprocating threaded rod fixedly installed at the bottom output end of the motor, the reciprocating threaded rod being arranged vertically downward, a pull plate being threadedly connected to the outer wall of the reciprocating threaded rod, the pull plate being slidably installed on the outer wall of the support column, and the pull plate being arranged in a horizontal state.

[0008] In a preferred embodiment, pull ropes are fixedly installed on the bottom of both sides of the pull plate, the two pull ropes are arranged symmetrically, a rotating block is fixedly installed on the top of the two pull ropes, a support plate is rotatably installed on the outer wall of the two rotating blocks, the support plate is arranged horizontally, side plates are fixedly installed on the top of both sides of the support plate, the two side plates are arranged vertically, a rotating shaft block is rotatably installed on one side of the support plate, the rotating shaft block is slidably installed on the outer wall of the partition, and a rear cover plate is rotatably installed on the top of the rotating shaft block, the rear cover plate is arranged vertically.

[0009] In a preferred embodiment, the top of the two side panels is provided with pressure strips, the two pressure strips are fixedly installed on the pull plate, the two pressure strips are arranged in a vertical state, and the bottom of the two pressure strips are arranged parallel to each other with the top of the side panels.

[0010] In a preferred embodiment, the mixing mechanism includes a horizontal push plate fixedly installed on the outer wall of one side of the pull plate. The horizontal push plate is horizontally arranged. A positioning bar is fixedly installed on one side of the horizontal push plate. Multiple threaded lifting rods are rotatably installed at the bottom of the positioning bar. The multiple threaded lifting rods are vertically arranged and are equidistantly arranged.

[0011] In a preferred embodiment, a plurality of turntable strips are fixedly installed on the bottom outer wall of the plurality of threaded lifting rods, and a limiting plate is threadedly connected to the outer wall of the plurality of threaded lifting rods. The plurality of limiting plates are fixedly installed on the top of the partition.

[0012] In a preferred embodiment, the dispersing mechanism includes a material box fixedly installed on the top of one side of the processing box. The bottom of the material box has a slot, and the inner wall of the slot has a retaining plate. The outer wall of the retaining plate is in contact with the slot. A feeding plate is fixedly installed at the bottom of the retaining plate. The top two sides of the feeding plate are inclined, and the feeding plate and the retaining plate are parallel to each other.

[0013] In a preferred embodiment, a lifting strip is fixedly installed on the top of the card plate, the lifting strip is slidably installed on the outer wall of the material box, the lifting strip is arranged in a U-shape, a pressing plate is fixedly installed on the other outer wall of the lifting strip, the pressing plate and the lifting strip are arranged perpendicular to each other, the top of the lifting strip and the bottom of the corresponding strip are in contact with each other, a return spring is fixedly installed on the bottom inner wall of the pressing plate, and the return spring is fixedly installed on the top of the material box.

[0014] A method for removing heavy metals from sludge in a wastewater treatment plant includes the following steps: Step 1: The motor drives the reciprocating threaded rod to rotate, causing the pull plate to move up and down back and forth. When the pull plate moves up, it pulls the pull ropes on both sides, causing the rotating block to lift the bearing plate. Then, the bearing plate drives the side plate to shift upward through the rotating shaft block and picks up the silt. Step 2: After the support plate moves the silt to a high position, the inclined support plate carries the silt over the top of the partition, and then the back cover is squeezed and flipped backward, so that the silt falls into the other side of the partition. Step 3: The pull plate moves, causing the horizontal push plate to move synchronously. The horizontal push plate causes the corresponding bar and multiple threaded lifting rods to move up and down synchronously. The multiple threaded lifting rods cause multiple rotating plate bars to move up and down synchronously. When the multiple threaded lifting rods pass through the limiting plate, the limiting plate squeezes and causes the multiple threaded lifting rods and multiple rotating plate bars to rotate synchronously. That is, the multiple rotating plate bars move up and down back and forth and rotate synchronously. Step 4: When the pull plate moves down, it drives the pressure strip to press down on the top of the side plate, causing the support plate to deflect downward and be sent into the sludge pile, making it easier to lift the sludge next time. Step 5: The chemicals in the hopper are discharged through the slot, while the feed plate and the clamping plate move down in the hopper and the chemicals are loaded through the inclined areas on both sides of the top of the feed plate. Step Six: As the extrusion plate moves down in sync with the compression strip, the extrusion plate drives the lifting strip plate and the clamping plate to move down in sync, and compresses the return spring. At this time, after the feeding plate extends out of the bottom of the material box, it discharges the drug through the inclined areas on both sides, while the clamping plate blocks the slot of the material box.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention utilizes a batching mechanism and a mixing mechanism. A motor drives a reciprocating threaded rod to rotate, causing a pull plate to move up and down repeatedly. The pull plate causes a supporting plate to shift upwards, scooping up sludge. After the supporting plate moves the sludge to a high position, the sludge falls to the other side of the partition. When the pull plate moves downwards, it causes a pressure bar to press down on the top of the side plate, causing the supporting plate to deflect downwards and be fed into the sludge pile for easy sludge removal next time. The movement of the pull plate also causes a horizontal push plate to move multiple threaded lifting rods and multiple turning plates up and down synchronously, stirring up some of the sludge and mixing it with chemical agents, achieving the effect of efficient removal of heavy metals from the sludge.

[0016] 2. The simultaneous dispersing mechanism, with the lowering of the corresponding strips driving the lifting strips and the clamping plate to move down synchronously, allows the discharge plate to discharge the drug through the inclined areas on both sides, thereby completing the addition of some chemical drugs. This ensures that the sludge and chemical drugs are mixed evenly and uniformly, guaranteeing the efficient removal of heavy metals from the sludge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a top view of the present invention.

[0019] Figure 3 This is a vertical sectional view of the present invention.

[0020] Figure 4 For the present invention Figure 3 Enlarged view of the structure of part A.

[0021] Figure 5 This is a partial cross-sectional view of the mixing mechanism in this invention.

[0022] Figure 6 This is a vertical cross-sectional view of the dispersion mechanism in this invention.

[0023] Figure 7 This is a partial cross-sectional view of the dispersion mechanism in this invention.

[0024] The attached diagram is labeled as follows: 1. Processing box; 2. Partition plate; 3. Support column; 4. Batch separation mechanism; 41. Motor; 42. Reciprocating threaded rod; 43. With pull plate; 44. Pull rope; 45. Rotating block; 46. Support plate; 47. Side plate; 48. Rotating shaft block; 49. Rear cover plate; 410. Pressure bar; 5. Mixing mechanism; 51. Horizontal push plate; 52. Corresponding bar; 53. Threaded lifting rod; 54. Turning plate bar; 55. Limiting plate; 6. Mixing mechanism; 61. Material box; 62. Clamping plate; 63. Discharge plate; 64. Pulling bar plate; 65. Pressing plate; 66. Return spring. Detailed Implementation

[0025] 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. Example 1

[0026] In existing technologies, sludge is piled up in a concentrated manner during treatment. Due to the lack of a structure that allows for batch and uniform processing, most of the sludge cannot be mixed effectively and promptly with chemical agents, resulting in uneven mixing. To solve this problem, the following technical solution is proposed: Refer to the instruction manual appendix Figures 1-7 A method for removing heavy metals from sludge in wastewater treatment plants, such as... Figure 1 and Figure 2 As shown, the treatment box includes a treatment box 1. A partition 2 is fixedly installed on the inner wall of the middle part of the treatment box 1. Support columns 3 are fixedly installed on both sides of the top of the treatment box 1. The treatment box 1 is equipped with a batching mechanism 4 and a mixing mechanism 5. The batching mechanism 4 can lift and send out the sludge in batches multiple times. The mixing mechanism 5 can stir the sludge and chemical agents up and down repeatedly to improve the uniformity of mixing. The top of the treatment box 1 is equipped with a uniform dispersing mechanism 6. The uniform dispersing mechanism 6 can repeatedly add uniform chemical agents to achieve a uniform ratio of chemical agents to sludge.

[0027] like Figure 2 and Figure 3 As shown, the batching mechanism 4 includes a motor 41 fixedly installed on the top of the support column 3. A reciprocating threaded rod 42 is fixedly installed at the bottom output end of the motor 41. The reciprocating threaded rod 42 is set vertically downward. A pull plate 43 is threadedly connected to the outer wall of the reciprocating threaded rod 42. The pull plate 43 is slidably installed on the outer wall of the support column 3 and is set in a horizontal state. The motor 41 drives the reciprocating threaded rod 42 to rotate, causing the pull plate 43 to move up and down reciprocally.

[0028] like Figure 3 and Figure 4 As shown, pull ropes 44 are fixedly installed on the bottom of both sides of the pull plate 43. The two pull ropes 44 are arranged symmetrically. A rotating block 45 is fixedly installed on the top of the two pull ropes 44. A support plate 46 is rotatably installed on the outer wall of the two rotating blocks 45. The support plate 46 is arranged in a horizontal state. Side plates 47 are fixedly installed on the top of both sides of the support plate 46. The two side plates 47 are arranged in a vertical state. A rotating shaft block 48 is rotatably installed on one side of the support plate 46. The rotating shaft block 48 is slidably installed on the outer wall of the partition 2. A rear cover plate 49 is rotatably installed on the top of the rotating shaft block 48. The rear cover plate 49 is arranged in a vertical state. When the pull plate 43 moves upward, it pulls the pull ropes 44 on both sides, causing the rotating block 45 to lift the support plate 46. Then, the support plate 46 drives the side plate 47 to shift upward through the rotating shaft block 48 and picks up the silt. It is then restricted by the rear cover plate 49 to prevent it from falling off, thereby causing the silt to move upward synchronously.

[0029] like Figure 3 and Figure 4As shown, the top of the two side plates 47 is provided with pressure strips 410. The two pressure strips 410 are fixedly installed on the pull plate 43. The two pressure strips 410 are set in a vertical state, and the bottom of the two pressure strips 410 is parallel to the top of the side plates 47. When the pull plate 43 moves down, it causes the pressure strip 410 to press down on the top of the side plate 47, causing the support plate 46 to deflect downward and be sent into the sludge pile.

[0030] like Figure 1 and Figure 5 As shown, the mixing mechanism 5 includes a horizontal push plate 51 fixedly installed on the outer wall of one side of the pull plate 43. The horizontal push plate 51 is set in a horizontal state. A corresponding bar 52 is fixedly installed on one side of the horizontal push plate 51. Multiple threaded lifting rods 53 are rotatably installed at the bottom of the corresponding bar 52. The multiple threaded lifting rods 53 are set in a vertical state and are arranged at equal intervals. The movement of the pull plate 43 drives the horizontal push plate 51 to move synchronously, and the horizontal push plate 51 drives the corresponding bar 52 and multiple threaded lifting rods 53 to move up and down synchronously.

[0031] like Figure 1 and Figure 5 As shown, multiple rotating plates 54 are fixedly installed on the bottom outer wall of multiple threaded lifting rods 53, and multiple limiting plates 55 are threadedly connected to the outer wall of multiple threaded lifting rods 53. Multiple limiting plates 55 are fixedly installed on the top of partition plate 2. Multiple threaded lifting rods 53 drive multiple rotating plate strips 54 to move up and down synchronously. When the multiple threaded lifting rods 53 pass through the limiting plate 55, the limiting plate 55 squeezes and drives the multiple threaded lifting rods 53 and the multiple rotating plate strips 54 to rotate synchronously. That is, the multiple rotating plate strips 54 move up and down back and forth and rotate synchronously.

[0032] In specific implementation, the motor 41 drives the reciprocating threaded rod 42 to rotate, causing the pull plate 43 to move up and down reciprocally. When the pull plate 43 moves up, it pulls the pull ropes 44 on both sides, causing the rotating block 45 to lift the support plate 46. The support plate 46 then drives the side plate 47 to shift upward through the rotating shaft block 48 and picks up the silt. The rear cover plate 49 restricts and prevents it from falling off, thereby driving the silt to move upward synchronously. After the support plate 46 drives the silt to move to a high position, the inclined support plate 46 drives the silt past the top of the partition 2, which then squeezes the rear cover plate 49 to flip backward, causing the silt to fall into the other side of the partition 2. When the pull plate 43 moves down, it drives the pressure strip 410 to press down on the top of the side plate 47, causing the support plate 46 to deflect downward and be sent into the sludge pile so that the sludge can be lifted up next time. Simultaneously, the movement of the pull plate 43 drives the horizontal push plate 51 to move synchronously. The horizontal push plate 51 drives the corresponding bar 52 and multiple threaded lifting rods 53 to move up and down synchronously. The multiple threaded lifting rods 53 drive multiple rotating plate bars 54 to move up and down synchronously. When the multiple threaded lifting rods 53 pass through the limiting plate 55, the limiting plate 55 squeezes and drives the multiple threaded lifting rods 53 and multiple rotating plate bars 54 to rotate synchronously. That is, the multiple rotating plate bars 54 move up and down back and forth synchronously to rotate. Example 2

[0033] Existing technologies lack a structure capable of co-processing chemical agents and sludge, meaning the mixing effect of sludge and chemical agents cannot be uniformly achieved, thus failing to guarantee efficient removal of heavy metals from the sludge. To address this issue, the following technical solution is proposed: like Figure 6 and Figure 7 As shown, the dispersing mechanism 6 includes a material box 61 fixedly installed on the top of one side of the processing box 1. The bottom of the material box 61 is provided with a slot, and the inner wall of the slot is provided with a clamping plate 62. The outer wall of the clamping plate 62 is in contact with the slot. A feeding plate 63 is fixedly installed at the bottom of the clamping plate 62. The top two sides of the feeding plate 63 are set in an inclined state, and the feeding plate 63 and the clamping plate 62 are set parallel to each other. The chemical drugs in the material box 61 are discharged through the slot. When the feeding plate 63 and the clamping plate 62 move down in the material box 61, the drugs are loaded through the inclined areas on both sides of the top of the feeding plate 63. After the feeding plate 63 extends out of the bottom of the material box 61, the drugs are discharged through the inclined areas on both sides. At the same time, the clamping plate 62 blocks the slot of the material box 61.

[0034] like Figure 6 and Figure 7 As shown, a lifting strip 64 is fixedly installed on the top of the card plate 62. The lifting strip 64 is slidably installed on the outer wall of the material box 61. The lifting strip 64 is arranged in a U-shape. A pressing plate 65 is fixedly installed on the other outer wall of the lifting strip 64. The pressing plate 65 and the lifting strip 64 are arranged perpendicular to each other. The top of the lifting strip 64 is in contact with the bottom of the corresponding strip 52. A return spring 66 is fixedly installed on the bottom inner wall of the pressing plate 65. The return spring 66 is fixedly installed on the top of the material box 61. When the corresponding strip 52 moves down and squeezes the pressing plate 65 to move down simultaneously, the pressing plate 65 drives the lifting strip 64 and the clamping plate 62 to move down simultaneously, and compresses the reset spring 66.

[0035] In practice, the chemical drugs in the material box 61 are discharged through the slot. When the feeding plate 63 and the clamping plate 62 move down in the material box 61, the drug is loaded through the inclined areas on both sides of the top of the feeding plate 63. The corresponding strip 52 moves down and squeezes the pressing plate 65 down synchronously. The pressing plate 65 drives the pulling strip 64 and the clamping plate 62 to move down synchronously and compress the return spring 66. At this time, after the feeding plate 63 extends out of the bottom of the material box 61, the drug is discharged through the inclined areas on both sides. At the same time, the clamping plate 62 blocks the slot of the material box 61, thus completing the operation of adding part of the chemical drugs.

[0036] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 device for removing heavy metals from sludge in a wastewater treatment plant, comprising a treatment tank (1), wherein a partition (2) is fixedly installed on the inner wall of the middle part of the treatment tank (1), and support columns (3) are fixedly installed on both sides of the top of the treatment tank (1), characterized in that, The treatment tank (1) is equipped with a batching mechanism (4) and a mixing mechanism (5). The batching mechanism (4) can lift and send out sludge in batches multiple times. The mixing mechanism (5) can stir the sludge and chemical agents up and down repeatedly to improve the uniformity of mixing. The top of the treatment tank (1) is equipped with a uniform dispersing mechanism (6). The uniform dispersing mechanism (6) can repeatedly add uniform chemical agents to achieve a uniform ratio of chemical agents and sludge.

2. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 1, characterized in that: The batching mechanism (4) includes a motor (41) fixedly installed on the top of the support column (3). A reciprocating threaded rod (42) is fixedly installed at the bottom output end of the motor (41). The reciprocating threaded rod (42) is set vertically downward. A pull plate (43) is threadedly connected to the outer wall of the reciprocating threaded rod (42). The pull plate (43) is slidably installed on the outer wall of the support column (3). The pull plate (43) is set in a horizontal state.

3. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 2, characterized in that: Pull ropes (44) are fixedly installed on both sides of the bottom of the pull plate (43). The two pull ropes (44) are arranged symmetrically. A rotating block (45) is fixedly installed on the top of the two pull ropes (44). A support plate (46) is rotatably installed on the outer wall of the two rotating blocks (45). The support plate (46) is arranged in a horizontal state. Side plates (47) are fixedly installed on the top of both sides of the support plate (46). The two side plates (47) are arranged in a vertical state. A rotating shaft block (48) is rotatably installed on one side of the support plate (46). The rotating shaft block (48) is slidably installed on the outer wall of the partition (2). A rear cover plate (49) is rotatably installed on the top of the rotating shaft block (48). The rear cover plate (49) is arranged in a vertical state.

4. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 3, characterized in that: The top of the two side plates (47) is provided with pressure strips (410), the two pressure strips (410) are fixedly installed on the pull plate (43), the two pressure strips (410) are set in a vertical state, and the bottom of the two pressure strips (410) is set parallel to the top of the side plates (47).

5. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 2, characterized in that: The mixing mechanism (5) includes a horizontal push plate (51) fixedly installed on the outer wall of one side of the pull plate (43). The horizontal push plate (51) is set in a horizontal state. A corresponding bar (52) is fixedly installed on one side of the horizontal push plate (51). Multiple threaded lifting rods (53) are rotatably installed at the bottom of the corresponding bar (52). The multiple threaded lifting rods (53) are set in a vertical state and are arranged at equal intervals.

6. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 5, characterized in that: Multiple rotating plates (54) are fixedly installed on the bottom outer wall of the multiple threaded lifting rods (53), and the outer wall of the multiple threaded lifting rods (53) is threadedly connected to limiting plates (55), and the multiple limiting plates (55) are fixedly installed on the top of the partition (2).

7. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 5, characterized in that: The dispersing mechanism (6) includes a material box (61) fixedly installed on the top of one side of the processing box (1). The bottom of the material box (61) is provided with a slot, and the inner wall of the slot is provided with a card plate (62). The outer wall of the card plate (62) is in contact with the slot. A feeding plate (63) is fixedly installed at the bottom of the card plate (62). The top two sides of the feeding plate (63) are set in an inclined state, and the feeding plate (63) and the card plate (62) are set parallel to each other.

8. The heavy metal removal device for sludge from a wastewater treatment plant according to claim 7, characterized in that: A lifting strip (64) is fixedly installed on the top of the card plate (62). The lifting strip (64) is slidably installed on the outer wall of the material box (61). The lifting strip (64) is arranged in a U-shape. A pressing plate (65) is fixedly installed on the other outer wall of the lifting strip (64). The pressing plate (65) and the lifting strip (64) are arranged perpendicular to each other. The top of the lifting strip (64) is in contact with the bottom of the corresponding strip (52). A return spring (66) is fixedly installed on the bottom inner wall of the pressing plate (65). The return spring (66) is fixedly installed on the top of the material box (61).

9. A method for removing heavy metals from sludge in a wastewater treatment plant, comprising the heavy metal removal device for sludge in a wastewater treatment plant as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The motor (41) drives the reciprocating threaded rod (42) to rotate, causing the pull plate (43) to move up and down repeatedly. When the pull plate (43) moves up, it pulls the pull ropes (44) on both sides, which drives the rotating block (45) to lift the support plate (46). Then the support plate (46) drives the side plate (47) to shift upward through the rotating shaft block (48) and pick up the silt. Step 2: After the silt is moved up to a high place by the support plate (46), the silt is moved through the top of the partition (2) by the inclined support plate (46), and then the back cover plate (49) is squeezed and flipped backward, so that the silt falls into the other side of the partition (2). Step 3: The pull plate (43) moves and drives the horizontal push plate (51) to move synchronously. The horizontal push plate (51) drives the corresponding bar (52) and multiple threaded lifting rods (53) to move up and down synchronously. The multiple threaded lifting rods (53) drive multiple rotating plate bars (54) to move up and down synchronously. When the multiple threaded lifting rods (53) pass through the limiting plate (55), the limiting plate (55) squeezes and drives the multiple threaded lifting rods (53) and multiple rotating plate bars (54) to rotate synchronously. That is, the multiple rotating plate bars (54) move up and down back and forth synchronously to rotate. Step 4: When the pull plate (43) moves down, it drives the pressure strip (410) to press down on the top of the side plate (47), causing the support plate (46) to deflect downward and be sent into the sludge pile so that the sludge can be lifted up next time. Step 5: The chemical drugs in the material box (61) are discharged through the slot, while the feed plate (63) and the clamping plate (62) move down in the material box (61) and the drugs are loaded through the inclined areas on both sides of the top of the feed plate (63). Step 6: When the corresponding strip (52) moves down and the pressing plate (65) moves down synchronously, the pressing plate (65) drives the lifting strip (64) and the clamping plate (62) to move down synchronously and compress the reset spring (66). At this time, after the feeding plate (63) extends out of the bottom of the material box (61), the drug is discharged through the inclined areas on both sides. At the same time, the clamping plate (62) blocks the slot of the material box (61).

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