Chemical production wastewater flocculation and precipitation tank treatment device

Abstract

This invention relates to the field of chemical wastewater treatment technology, and particularly to a flocculation sedimentation tank treatment device for chemical production wastewater. The device includes a traveling frame, a track, and a sludge scraping mechanism. The sludge scraping mechanism includes a lifting drive unit, a sludge scraping section mounted on the lower end of the traveling frame via the lifting drive unit, and a pretreatment section. The sludge scraping section includes a scraper blade and a drag-reducing component to reduce the resistance encountered by the scraper blade during its reversing movement. The pretreatment section includes multiple agitator plates rotatably arranged on the left side of the scraper blade and distributed front and back, and a swinging component to drive the agitator plates to reciprocate back and forth. This invention reduces the resistance of the scraper blade during sludge scraping by using a pretreatment section to agitate and disperse the sludge at the bottom of the sedimentation tank. The drag-reducing component further reduces the resistance when the scraper blade reverses its reversing movement. Simultaneously, the symmetrically distributed and counter-oscillating agitator plates improve the uniformity of sludge distribution, thereby improving the uniformity of force on the scraper blade, ultimately extending its service life and improving the sludge cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of chemical wastewater treatment technology, and in particular to a flocculation sedimentation tank treatment device for chemical production wastewater. Background Technology

[0002] Sodium metabisulfite is an inorganic compound, appearing as white or yellow crystals with a strong, pungent odor. It is readily soluble in water, and its aqueous solution is acidic. The production of sodium metabisulfite generates a large amount of wastewater, which mainly contains abundant sulfates (such as sodium sulfate and sodium sulfite), small amounts of unreacted elemental sulfur, suspended solids, and acidic substances. Flocculation and sedimentation are among the most crucial steps in treating this wastewater. The process typically involves adding flocculants to the wastewater, causing large molecules that are difficult to settle to aggregate and form flocs that settle and separate from the water, thereby reducing the organic matter and hardness content. The flocs deposited in the sedimentation tank form sludge, which needs to be cleaned regularly to maintain the treatment efficiency of the sedimentation tank and prevent secondary pollution.

[0003] Currently, sludge at the bottom of sedimentation tanks is often cleaned using a traveling scraper. During cleaning, the sludge scraper moves horizontally via the traveling frame to push the sludge to the discharge port for centralized treatment. However, due to the thick sludge buildup, the scraper experiences significant resistance during movement, which can affect the scraping effect or even damage the scraper. Although the thickness of the sludge at the bottom of the sedimentation tank can be reduced by shortening the cleaning cycle, this would affect the sedimentation operation of the sedimentation tank and the overall wastewater treatment efficiency.

[0004] Secondly, since most existing scraper blades are solid plates, they experience significant reaction forces from the wastewater in the sedimentation tank during the reverse reset process after scraping. This also disturbs the wastewater, affecting sedimentation efficiency. Furthermore, the sludge at the bottom of the sedimentation tank is typically thicker in the middle and thinner at the sides. Therefore, the scraper blades experience uneven stress during sludge removal, which can easily lead to structural damage due to excessive localized stress and also affect the uniformity of the cleaning process.

[0005] Therefore, in order to reduce the resistance encountered by the scraper blade during the sludge cleaning process, extend its service life, and improve the sludge scraping effect, this invention proposes a flocculation sedimentation tank treatment device for chemical production wastewater. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a chemical production wastewater flocculation sedimentation tank treatment device to overcome the shortcomings of the prior art. The device includes a traveling frame, tracks and a sludge scraping mechanism. Two tracks are symmetrically installed on the top of the sedimentation tank. A traveling frame for driving the sludge scraping mechanism to move left and right is fixedly installed between the two tracks. The sludge scraping mechanism is located at the lower end of the traveling frame.

[0007] The sludge scraping mechanism includes a lifting drive unit, a sludge scraping unit installed at the lower end of the trolley frame via the lifting drive unit, and a pretreatment unit located on the left side of the sludge scraping unit. The pretreatment unit, driven by the trolley frame, divides and pushes the sludge in the sedimentation tank into blocks and reduces the resistance encountered by the sludge scraping unit during the sludge scraping process.

[0008] The scraping section includes a scraper blade and a drag-reducing component for reducing the resistance encountered by the scraper blade during its reset movement.

[0009] The pretreatment section includes multiple agitators rotatably disposed on the left side of the scraper and distributed back and forth, as well as an oscillating assembly for driving the multiple agitators to oscillate back and forth to agitate and disperse the sludge.

[0010] Multiple agitators are symmetrically divided into two groups, with the two groups of agitators swinging in opposite directions.

[0011] The scraper blade has a storage groove on its left side that corresponds to the agitator plate.

[0012] Preferably, the scraper blade has a cavity near its upper end, and the oscillating assembly is located inside the cavity; the oscillating assembly includes a gear fixedly connected to the upper end of the agitator and an active component for driving the gear to rotate.

[0013] Preferably, the active component consists of a mounting rod, a set of racks I and an L-shaped rod mounted on the left side of the mounting rod, and a set of racks II mounted on the left side of the L-shaped rod; wherein, the left side of rack I meshes with a gear on a set of agitators located behind the scraper, and the right side of rack II meshes with a gear on a set of agitators located in front of the scraper.

[0014] Preferably, the scraper has square grooves symmetrically arranged at the upper end, and the swing assembly further includes a moving component for driving the active component to move back and forth; the moving component consists of two guide rails symmetrically installed on the inner wall of the sedimentation tank, and the guide rails have wavy guide grooves with left and right openings inside; the wavy structures of the front and rear guide grooves are arranged correspondingly on the left and right, and a sliding rod is slidably arranged in the guide groove, the lower end of the sliding rod is fixedly connected to the upper end of the slider that is slidably installed in the square groove, and the lower end of the slider is fixedly connected to the active component.

[0015] Preferably, in the oscillating assembly, the diameter of the gear near the center of the scraper is larger than the diameter of the gear away from the center of the scraper; when the gear is driven to rotate by the driving component, the rotation amplitude of the gear near the center of the scraper is smaller than the rotation amplitude of the gear away from the center of the scraper.

[0016] Preferably, the upper end of the scraper plate is provided with a positioning hole one corresponding to the receiving groove, and the upper end of the agitator plate is provided with a positioning hole two corresponding to the positioning hole one.

[0017] Preferably, the moving end of the lifting drive unit has a strip groove, and a lifting plate is slidably installed between the front and rear strip grooves. A positioning rod corresponding to the positioning hole is installed at the lower end of the lifting plate.

[0018] Preferably, the sliding rod is divided into upper and lower parts, which are hinged to each other; wherein, the upper part of the sliding rod is slidably connected to the guide groove, and the lower part is fixedly connected to the slider, and the front and rear ends of the lifting plate are elastically slidably and symmetrically equipped with U-shaped limiting frames, which are sleeved on the outside of the sliding rod.

[0019] Preferably, the drag reduction component includes multiple drag reduction grooves evenly spaced vertically on the right side of the scraper blade located in the receiving groove. The drag reduction grooves are all located below the cavity of the scraper blade, and a movable plate is slidably installed vertically inside the drag reduction groove. A matching groove corresponding to the drag reduction groove is provided on the side wall of the stirring plate. The lower end of the movable plate is a hollow structure, and the lower end of the movable plate is slidably connected vertically to the scraper blade. The upper and lower adjacent movable plates are fixedly connected by a connecting rod.

[0020] Preferably, a synchronizing rod is fixedly connected between the uppermost movable plate and the lifting plate; when the movable plate moves to the upper limit position, the drag-reducing groove is completely blocked by the movable plate.

[0021] As can be seen from the above technical solutions, the chemical production wastewater flocculation sedimentation tank treatment device designed in this invention has the following beneficial effects:

[0022] 1. Equipped with a pretreatment section, which can agitate and disperse the sludge at the bottom of the sedimentation tank before the scraper operates, reducing the resistance exerted by the sludge on the scraper, ensuring the service life of the scraper and the cleaning effect. The pretreatment section uses a small back-and-forth oscillation method to agitate the sludge, which reduces the sludge resistance without causing excessive disturbance to the wastewater in the sedimentation tank, thus preventing the sludge from being resuspended in the water and causing secondary pollution.

[0023] 2. Equipped with a drag-reducing component, which can reduce the resistance experienced by the scraper and the disturbance to the wastewater in the sedimentation tank during the reverse movement of the scraper, thereby ensuring the service life of the scraper and the sedimentation effect of the sedimentation tank.

[0024] 3. The agitator plates in the pretreatment section are symmetrically divided into two groups, and the two groups of agitator plates swing in opposite directions. This can push the sludge deposited in the middle of the sedimentation tank to both sides, so that the scraper plates are subjected to more uniform force when cleaning the sludge, thereby ensuring the cleaning effect. At the same time, it also avoids structural damage caused by uneven force on the scraper plates due to more sludge in the middle.

[0025] In summary, this invention reduces the resistance of the scraper blades when scraping sludge by a pretreatment section that agitates and disperses the sludge at the bottom of the sedimentation tank, reduces the resistance of the scraper blades when reversing by a drag-reducing component, and improves the uniformity of sludge distribution by agitating plates that are symmetrically distributed and swing in opposite directions, thereby improving the uniformity of force on the scraper blades, so as to extend the service life and improve the sludge cleaning effect. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0029] Figure 3 yes Figure 2 A schematic diagram of the structure from another perspective.

[0030] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0031] Figure 5 This is a top sectional view of the scraper, agitator, etc. of the present invention.

[0032] Figure 6 This is a side sectional view of the scraper, moving plate, and connecting rod of the present invention.

[0033] Figure 7 This is a front sectional view of the scraper, moving plate, and connecting rod of the present invention.

[0034] Figure 8 This is a side sectional view of the sliding rod of the present invention.

[0035] Figure 9 This is a top sectional view of the front and rear guide rails of the present invention.

[0036] Reference numerals: 1. Overhead frame; 2. Track; 3. Sludge scraping mechanism; 31. Lifting drive unit; 311. Fixed frame; 312. Lifting rod; 313. Hydraulic cylinder; 32. Sludge scraping unit; 321. Sludge scraper; 322. Drag reduction component; 3221. Moving plate; 3222. Connecting rod; 3223. Synchronizing rod; 33. Pretreatment unit; 331. Stirring plate; 332. Swinging component; 333. Gear; 334. Driving component; 335. Mounting rod; 336. Rack one; 337. L-shaped rod; 338. Rack two; 339. Moving component; 340. Baffle; 341. Guide rail; 342. Sliding rod; 343. Sliding block; 344. Lifting plate; 345. Positioning rod; 346. Limiting frame. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely 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.

[0038] See Figure 1 A chemical production wastewater flocculation sedimentation tank treatment device is used to clean the sludge at the bottom of the sedimentation tank. A sludge discharge port is provided on the left side of the bottom of the sedimentation tank, and a sludge discharge hopper is provided below the sludge discharge port. The sludge in the sludge discharge hopper can be discharged by an external sewage pump. A drain outlet is provided on the right side of the bottom of the sedimentation tank. The treatment device includes a traveling frame 1, a track 2, and a sludge scraping mechanism 3. There are two tracks 2, which are symmetrically installed on the top of the sedimentation tank. The traveling frame 1 for driving the sludge scraping mechanism 3 to move left and right is fixedly installed between the two tracks 2. The sludge scraping mechanism 3 is located at the lower end of the traveling frame 1.

[0039] See Figure 1 The sludge scraping mechanism 3 includes a lifting drive unit 31, a sludge scraping part 32 installed at the lower end of the trolley frame 1 via the lifting drive unit 31, and a pretreatment part 33 located on the left side of the sludge scraping part 32. The pretreatment part 33, driven by the trolley frame 1, pushes the sludge in the sedimentation tank in sections and reduces the resistance encountered by the sludge scraping part 32 during the sludge scraping process.

[0040] See Figure 1 , Figure 2 , Figure 3 and Figure 5 The sludge scraping section 32 includes a sludge scraper 321, and the pretreatment section 33 includes a plurality of agitating plates 331 rotatably disposed on the left side of the sludge scraper 321 and distributed back and forth, and an oscillating assembly 332 for driving the plurality of agitating plates 331 to oscillate back and forth to agitate and disperse the sludge. The plurality of agitating plates 331 distributed back and forth are symmetrically divided into two groups, and the two groups of agitating plates 331 oscillate in opposite directions.

[0041] See Figure 1 and Figure 3 The lifting drive unit 31 includes a fixed frame 311 symmetrically fixedly installed at the lower end of the traveling frame 1. Lifting rods 312 are slidably installed inside the fixed frame 311. The mud scraper 321 is fixedly installed at the lower end of the two lifting rods 312 by bolts. The two lifting rods 312 are connected by a connecting plate. A hydraulic cylinder 313 is fixedly installed between the connecting plate and the lower end of the traveling frame 1.

[0042] The height of the scraper blade 321 is adjusted by the hydraulic cylinder 313 to meet the actual working needs. During the height adjustment process, the lifting rod 312 slides inside the fixed frame 311. The sliding cooperation between the two improves the stability during adjustment.

[0043] See Figure 5 The scraper blade 321 has a cavity near its upper end, and the swing assembly 332 is located in the cavity. The swing assembly 332 includes a gear 333 fixedly connected to the upper end of the agitator plate 331 and an active component 334 for driving the gear 333 to rotate. The active component 334 consists of a mounting rod 335, a set of racks 336 and an L-shaped rod 337 mounted on the left side of the mounting rod 335, and a set of racks 338 mounted on the left side of the L-shaped rod 337. The left side of the racks 336 meshes with the gear 333 on the agitator plate 331 located behind the scraper blade 321, and the right side of the racks 338 meshes with the gear 333 on the agitator plate 331 located in front of the scraper blade 321, so that the two sets of gears 333 rotate in opposite directions.

[0044] See Figure 3 , Figure 4 , Figure 5 and Figure 9 The scraper blade 321 has square grooves symmetrically opened at the front and back of its upper end. The swing assembly 332 also includes a moving part 339 for driving the active part 334 to move back and forth. The moving part 339 consists of two guide rails 341 symmetrically installed on the inner wall of the sedimentation tank. Sufficient gaps are left between the left and right ends of the guide rails 341 and the left and right inner walls of the sedimentation tank so that the scraper blade 321 can be moved to the bottom of the sedimentation tank by the lifting drive part 31, or the scraper blade 321 can be moved out of the bottom of the sedimentation tank. The guide rails 341 have left and right openings and wavy guide grooves. The wavy structures of the front and rear guide grooves are arranged correspondingly on the left and right. A sliding rod 342 is slidably arranged in the guide groove. The lower end of the sliding rod 342 is fixedly connected to the upper end of the slider 343 that is slidably installed in the square groove. The lower end of the slider 343 is fixedly connected to the active part 334. Specifically, the rear slider 343 is fixedly connected to the mounting rod 335, and the front slider 343 is fixedly connected to the rack 338.

[0045] It should be noted that, for reference Figure 4 and Figure 5 A clearance groove (not shown in the figure) is provided on one side of the two square grooves that are close to each other. A baffle 340 is installed on one side of the two sliders 343 that are close to each other. The baffle 340 is slidably connected to the clearance groove on one side of the two sliders 343 that are close to each other. The baffle 340 is used to prevent mud and water in the sedimentation tank from entering the cavity of the scraper 321 and causing corrosion to the swing assembly 332.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 9 When the scraper mechanism 3 moves from left to right via the gantry frame 1, the scraper 321 drives the sliding rod 342 to slide along the guide groove via the slider 343. The wave-shaped structure of the guide grooves on the front and rear sides pushes the sliding rod 342 to move back and forth. The sliding rod 342 drives the driving member 334 to move back and forth via the slider 343. This causes a set of racks 336 and racks 338 to drive their respective meshing gears 333 to deflect back and forth. As a result, the stirring plate 331 moves to the right with the scraper 321 and stirs the sludge in the front and back directions, dispersing the deposited sludge and reducing the resistance when the scraper 321 pushes the sludge to move.

[0047] Because the water flow velocity is faster near the pool wall, sludge does not easily settle, meaning there is less sludge. The sludge deposition thickness near the center of the sedimentation tank is often greater than that near the outer edges. Therefore, the resistance encountered when agitating the sludge in the center is greater. To address this, the present invention incorporates the following design: Figure 5 As shown, in the swing assembly 332, the diameter of the gear 333 near the middle of the scraper 321 is larger than the diameter of the gear 333 far from the middle of the scraper 321. When the gear 333 is driven to rotate by the driving member 334, the rotation amplitude of the gear 333 near the middle of the scraper 321 is smaller than the rotation amplitude of the gear 333 far from the middle of the scraper 321, so as to prevent the gear 333 in the middle and the agitator 331 from being damaged due to excessive resistance during rotation, thus affecting their service life.

[0048] See Figure 2 and Figure 3 The scraper 321 has a storage groove on its left side that corresponds to the agitator 331. The scraper 321 has a positioning hole 1 that corresponds to the storage groove on its upper end. The agitator 331 has a positioning hole 2 that corresponds to the positioning hole 1 on its upper end. The upper end of the positioning hole 2 is chamfered.

[0049] See Figure 2 , Figure 3 , Figure 4 and Figure 9 The lifting rod 312 has a strip groove, and a lifting plate 344 is slidably installed between the front and rear strip grooves. An electric push rod or other waterproof driving element (not shown in the figure) is installed between the lifting plate 344 and the strip groove to drive the lifting plate 344 to move up and down. A positioning rod 345 corresponding to the positioning hole is installed at the lower end of the lifting plate 344, and the lower end of the positioning rod 345 is chamfered.

[0050] The length and wave curvature of the guide groove are designed according to actual working needs, so that when the scraper 321 moves to the left or right side of the guide rail 341 and the sliding rod 342 moves out of the guide groove, the agitator 331 is completely retracted into the receiving groove.

[0051] When the sludge deposition thickness is small, there is no need to stir and disperse the sludge through the pretreatment section 33. After the stirring plate 331 is put into the receiving tank, the positioning hole one and the positioning hole two are distributed vertically. The lifting plate 344 drives the positioning rod 345 to move downward, so that the positioning rod 345 passes through the positioning hole one and the positioning hole two in turn, thereby fixing the stirring plate 331 in the receiving tank and forming a whole with the sludge scraper 321. Then, the whole moves from left to right to clean the sludge until the sludge enters the sludge discharge hopper through the sludge discharge port.

[0052] See Figure 4 , Figure 8 and Figure 9 The sliding rod 342 is divided into upper and lower parts, which are hinged to each other. The upper part of the sliding rod 342 is slidably connected to the guide groove, and the lower part is fixedly connected to the slider 343. The lifting plate 344 is symmetrically and elastically slidably mounted with a U-shaped limiting frame 346 (a spring is connected between the limiting frame 346 and the lifting plate 344, but the spring is not shown in the figure). The limiting frame 346 is sleeved on the outside of the sliding rod 342.

[0053] When the sliding rod 342 moves within the guide groove, thereby driving the agitator 331 to agitate and disperse the sludge, the limiting frame 346 is located between the upper and lower parts of the sliding rod 342 and moves synchronously back and forth with the sliding rod 342. The upper part of the sliding rod 342 is supported by the limiting frame 346 and remains upright. When the sliding rod 342 moves out of the guide groove, and the limiting frame 346 moves downward with the lifting plate 344 until it no longer contacts the upper part of the sliding rod 342, the upper part of the sliding rod 342 loses support and bends downward under the action of gravity, so that the upper end of the sliding rod 342 is located below the guide groove. The guide groove cannot drive the sliding rod 342 to move back and forth, and thus cannot drive the agitator 331 to swing back and forth. Therefore, the state of the agitator 331 can be adjusted according to actual needs to avoid unnecessary swinging of the agitator 331 and affect the normal operation of the sedimentation tank.

[0054] As one embodiment of the present invention, see [reference]. Figure 1 , Figure 2 , Figure 6 and Figure 7The scraping part 32 also includes a drag-reducing component 322 for reducing the resistance encountered by the scraper plate 321 during its reset movement. The drag-reducing component 322 includes multiple drag-reducing grooves evenly spaced vertically on the right side of the scraper plate 321 located in the receiving groove. The drag-reducing grooves are all located below the cavity of the scraper plate 321. The side wall of the stirring plate 331 is provided with a matching groove corresponding to the drag-reducing groove. The upper cross section of the matching groove is triangular. A moving plate 3221 is slidably installed vertically in the drag-reducing groove. The lower end of the moving plate 3221 is hollow. The lower end of the moving plate 3221 is slidably connected vertically to the scraper plate 321. The upper and lower adjacent moving plates 3221 are fixedly connected by a connecting rod 3222. The connecting rod 3222 is also slidably connected vertically to the scraper plate 321.

[0055] See Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 A synchronizing rod 3223 is fixedly connected between the uppermost movable plate 3221 and the lifting plate 344. When the movable plate 3221 moves to the upper limit position, the drag reduction groove is completely blocked by the movable plate 3221. When the movable plate 3221 moves to the lower limit position, there is a gap between the drag reduction groove and the movable plate 3221.

[0056] After the sludge is cleaned from left to right, the gantry frame 1 drives the scraper mechanism 3 to move from right to left to reset. Before resetting, the lifting plate 344 drives the moving plate 3221 to move downward to the limit position under the action of the synchronizing rod 3223, so that the drag reduction groove is exposed. When moving from right to left, the wastewater in the sedimentation tank can flow through the drag reduction groove, reducing the resistance when the scraper plate 321 moves, avoiding unnecessary structural damage due to excessive resistance when the scraper plate 321 resets, and extending the service life of the scraper plate 321.

[0057] Meanwhile, the mating groove on the side wall of the agitator 331, which corresponds to the drag reduction groove, can also reduce resistance during the resetting process. It can also reduce the resistance experienced by the agitator 331 when it agitates the sludge. At the same time, the sludge can pass through the strip groove, which further achieves a good dispersion effect and reduces the resistance when scraping the sludge. In addition, the upper cross section of the mating groove is triangular, which can effectively prevent sludge accumulation.

[0058] The above provides a detailed description of a chemical production wastewater flocculation sedimentation tank treatment device provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A chemical production wastewater flocculation sedimentation tank treatment device for cleaning the sludge at the bottom of the sedimentation tank, comprising a travelling crane frame, a track and a mud scraping mechanism, the track is two and symmetrically installed at the top of the sedimentation tank, the travelling crane frame for driving the mud scraping mechanism to move left and right is fixedly installed between the two tracks, and the mud scraping mechanism is located at the lower end of the travelling crane frame, characterized in that: the mud scraping mechanism comprises a lifting driving part, a mud scraping part installed at the lower end of the travelling crane frame through the lifting driving part, and a pretreatment part located at the left side of the mud scraping part, the pretreatment part drives the sludge in the sedimentation tank to be pushed in blocks and reduces the resistance of the mud scraping part during the scraping process under the driving of the travelling crane frame; the mud scraping part comprises a mud scraping plate and a resistance reduction assembly for reducing the resistance of the mud scraping plate during reset movement; the pretreatment part comprises a plurality of stirring plates rotatably arranged at the left side of the mud scraping plate and distributed front and back, and a swinging assembly for driving the plurality of stirring plates to swing back and forth to stir and disperse the sludge; the plurality of stirring plates distributed front and back are symmetrically divided into two groups, and the swinging directions of the two groups of stirring plates are opposite; a receiving groove corresponding to the stirring plate is formed at the left side of the mud scraping plate; the swinging assembly comprises a gear fixedly connected to the upper end of the stirring plate and a driving member for driving the gear to rotate; in the swinging assembly, the diameter of the gear close to the middle of the mud scraping plate is greater than the diameter of the gear away from the middle of the mud scraping plate; when the gear is driven to rotate by the driving member, the rotation amplitude of the gear close to the middle of the mud scraping plate is smaller than the rotation amplitude of the gear away from the middle of the mud scraping plate; a square groove is symmetrically formed at the upper end of the mud scraping plate, and the swinging assembly further comprises a moving member for driving the driving member to move back and forth; the moving member is composed of two guide rails symmetrically installed on the inner wall of the sedimentation tank, and a wave-shaped guide groove is formed in the guide rail; the wave-shaped structures of the front and back guide grooves are correspondingly arranged left and right, a sliding rod is slidably arranged in the guide groove left and right, the lower end of the sliding rod is fixedly connected with the upper end of a sliding block which is slidably arranged in the square groove, and the lower end of the sliding block is fixedly connected with the driving member; a strip-shaped groove is formed in the moving end of the lifting driving part, and a lifting plate is slidably installed between the two strip-shaped grooves; the sliding rod is divided into two parts, which are hingedly connected to each other; wherein, the upper part of the sliding rod is slidably connected with the guide groove, and the lower part is fixedly connected with the sliding block; U-shaped limit frames are symmetrically installed at the front and back ends of the lifting plate which are elastically slidably arranged front and back; 2. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 1, characterized in that, a cavity is formed at the position close to the upper end of the mud scraping plate, and the swinging assembly is located in the cavity.

3. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 2, characterized in that, the driving member is composed of an installation rod, a group of first rack installed at the left side of the installation rod, an L-shaped rod, and a group of second rack installed at the left side of the L-shaped rod; wherein, the left side of the first rack is engaged with the gear on the group of stirring plates located at the back side of the mud scraping plate, and the right side of the second rack is engaged with the gear on the group of stirring plates located at the front side of the mud scraping plate.

4. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 3, characterized in that, a positioning hole one corresponding to the receiving groove is formed at the upper end of the mud scraping plate, and a positioning hole two corresponding to the positioning hole one is formed at the upper end of the stirring plate.

5. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 4, characterized in that, a positioning rod corresponding to the positioning hole one is installed at the lower end of the lifting plate.

6. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 5, characterized in that, The resistance-reducing assembly comprises a plurality of resistance-reducing grooves evenly arranged on the upper and lower portions of the right side of the mud scraping plate in the receiving groove, the resistance-reducing grooves are located below the cavity of the mud scraping plate, and a moving plate is slidably arranged in the resistance-reducing grooves; a matching groove corresponding to the resistance-reducing grooves is arranged on the side wall of the stirring plate. The lower end of the moving plate is a hollow structure, the lower end of the moving plate is slidably connected with the mud scraping plate, and the adjacent moving plates are fixedly connected through connecting rods.

7. The chemical production wastewater flocculation sedimentation tank treatment device according to claim 6, characterized in that, A synchronous rod is fixedly connected between the uppermost moving plate and the lifting plate. When the moving plate moves to the upper limit position, the resistance-reducing grooves are completely blocked by the moving plate.

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