A high-salt and high-COD sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment equipment, and specifically discloses a high-salt and high-COD sewage treatment device, comprising a treatment tank, a scraper plate and a driving mechanism for driving the scraper plate to move, the scraper plate is provided with a collecting mechanism, the collecting mechanism comprises a collecting assembly for collecting scum and a collecting box for storing the collected scum, the collecting box is arranged on the scraper plate, the collecting assembly comprises a rotating roller rotatably matched with the collecting box and a scraper plate for scraping the scum, the bottom end portion of the rotating roller extends below the liquid level in the treatment tank, the scraper plate is installed on the outer peripheral surface of the rotating roller, a slag inlet is provided on the collecting box, when the rotating roller rotates, the scraper plate is driven to scrape the scum, and the scum between the scraper plate and the outer peripheral surface of the rotating roller enters the collecting box through the slag inlet; the high-salt and high-COD sewage treatment device of the invention can improve the treatment effect of sewage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment equipment, and in particular to a high-salt and high-COD sewage treatment device. Background Art

[0002] High-salt and high-COD (chemical oxygen demand) sewage usually refers to wastewater with serious organic pollution in the water body, which mainly comes from industrial production, agricultural discharge, domestic sewage and other aspects, especially wastewater from some chemical, pharmaceutical, printing and dyeing, papermaking and other industries. Since a large amount of organic raw materials are used in their production process, the COD value in the discharged wastewater is often high. Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc. Sewage treatment equipment is an industrial equipment that can effectively treat urban domestic sewage, industrial wastewater, etc.

[0003] A Chinese patent application document with publication number CN116119765A discloses a vertical dissolved air flotation machine, comprising a machine body, a slag discharge channel and a flotation tank, wherein the machine body is rotatably mounted between inner walls on opposite sides above the flotation tank, two transmission shafts are fixedly mounted on the outer surfaces of both ends of the two transmission shafts, chains are sleeved on the outer surfaces of the two sprockets at the same end of the two transmission shafts, and multiple scraper plates are evenly fixedly mounted on the outer surfaces of the two chains, a C-shaped plate and two fixed plates are fixedly mounted on the inner wall of the machine body near one end of the slag discharge channel, and a water storage cavity with a central opening is formed between the C-shaped plate and one of the fixed plates; when in use, after compressed gas is introduced into the sewage in the flotation tank, the bubbles combine with flocculants in the sewage to make the flocculants float on the liquid to achieve solid-liquid separation, and the floating flocculants usually form a thick layer of scum above the flotation tank, which needs to be gradually scraped out to the slag discharge channel by the scraper plates.

[0004] In the above technology, when the scum is scraped off by the scraper plate, the bubbles will be broken in the process of being continuously pushed from one side of the flotation tank to the other side by the scraper plate, and the flocculants will re-enter the tank, resulting in poor sewage treatment effect. Summary of the invention

[0005] The present invention provides a high-salt and high-COD sewage treatment device, which aims to solve the technical problem in the prior art that when scum is scraped off by a scraper plate, bubbles will break during the process of being continuously pushed from one side of the flotation tank to the other side by the scraper plate, and flocculants will re-enter the water tank, resulting in poor sewage treatment effect.

[0006] A high-salt and high-COD sewage treatment device of the present invention comprises a treatment tank, a scraper plate and a driving mechanism for driving the scraper plate to move, the scraper plate is provided with a collecting mechanism, the collecting mechanism comprises a collecting assembly for collecting scum and a collecting box for storing the collected scum, the collecting box is arranged on the scraper plate, the collecting assembly comprises a rotating roller rotatably matched with the collecting box and a scraper plate for scraping the scum, the bottom end portion of the rotating roller extends below the liquid level in the treatment tank, the scraper plate is installed on the outer peripheral surface of the rotating roller, a slag inlet is provided on the collecting box, when the rotating roller rotates, the scraper plate is driven to scrape the scum, and the scum between the scraper plate and the outer peripheral surface of the rotating roller enters the collecting box through the slag inlet.

[0007] Through the setting of the collecting mechanism, when the scum is treated, the rotating roller part extends below the liquid surface in the treatment pool. When the rotating roller rotates, it drives the scraping plate to scrape the scum. At this time, the scum is collected between the scraping plate and the outer peripheral surface of the rotating roller. When the rotating roller continues to rotate, the scum between the scraping plate and the outer peripheral surface of the rotating roller can enter the collection box through the scum inlet, thereby realizing the collection of the scum, which can improve the treatment effect of sewage.

[0008] Preferably, the collecting box is provided with a receiving mechanism at the slag inlet, and the receiving mechanism includes a receiving plate that slides toward or away from the rotating roller and an elastic member for pushing the receiving plate to slide toward the rotating roller. The receiving plate is slidably fitted in the collecting box, and the scraping plate is used to push the receiving plate to slide away from the rotating roller.

[0009] By setting the receiving mechanism, the receiving plate can cooperate with the rotating roller, so as to better collect the scum between the scraping plate and the outer peripheral surface of the rotating roller.

[0010] Preferably, the scraping plate is rotatably matched with a rotating roller, and the rotating roller is provided with a torsion spring for driving the scraping plate to reset.

[0011] During the rotation of the rotating roller, the scraping plate pushes the receiving plate to slide. During the rotation of the scraping plate, the scraping plate can be rotated and folded to avoid the scraping plate from getting stuck in the collection box.

[0012] Preferably, a defoaming mechanism is provided in the collecting box, and the defoaming mechanism includes a sealing component for sealing the slag inlet, a defoaming plate for pumping negative pressure into the collecting box, and a driving component for driving the defoaming plate to move. The defoaming plate is slidably fitted in the collecting box. After the sealing component seals the slag inlet, the defoaming plate slides and pumps negative pressure into the collecting box to perform defoaming.

[0013] Through the setting of the defoaming mechanism, when the driving component drives the defoaming plate to slide and adjust, it can drive the sealing component to seal the slag inlet. When the defoaming plate continues to slide and adjust, it can draw negative pressure into the collection box, thereby breaking the bubbles entering the collection box, which is convenient for subsequent processing of the bubbles.

[0014] Preferably, the sealing assembly includes a sealing plate for sealing the slag inlet and an elastic member 2 for driving the sealing plate to reset. The sealing plate is slidably fitted in the collection box, one end of the elastic member 2 is connected to the collection box, and the other end is connected to the sealing plate.

[0015] Preferably, the driving assembly includes a rack 2 installed on the side of the defoaming plate, a gear 2 meshing with the rack 2, a gear 3 coaxially connected to the gear 2, a rack 3 for driving the gear 3 to rotate at intervals, and an elastic member 3 for driving the defoaming plate to reset, and the rack 3 is arranged in the collection box.

[0016] Preferably, a collection area for collecting scum is provided in the treatment pool, and the collection box comprises a box body and a bottom plate, the bottom plate is rotatably matched with a scraper plate, and the scraper plate is provided with a torsion spring 2 for driving the scraper plate to reset.

[0017] Through the setting of the collection area, when the collection box moves to the collection area, the bottom plate is rotated and opened, and the scum in the collection box can fall into the collection area, completing the treatment of the scum and facilitating the subsequent scum collection operation.

[0018] Preferably, the treatment pool is provided with a cleaning device, which includes a nozzle for flushing the bottom plate and a water supply assembly for supplying water to the nozzle, and the nozzle is arranged in the collection area.

[0019] Through the setting of the cleaning device, the water supply component supplies water to the nozzle, and the bottom plate can be flushed through the nozzle, further facilitating the subsequent collection of scum.

[0020] Preferably, the scraping plate comprises a scraping portion and limiting portions arranged at both ends of the scraping portion along the length direction of the rotating roller, and the limiting portions are provided with a clearance groove for allowing liquid to pass through.

[0021] By setting the give-way groove, when the scraper plate scrapes the scum, the scraped liquid can re-enter the treatment pool after passing through the give-way groove, avoiding a large amount of liquid being collected in the collection box, and the subsequent inability to continuously collect the scum.

[0022] Preferably, the treatment pool is provided with a rack one along the movement direction of the scraper plate, and the rotating roller is provided with a gear one meshing with the rack one.

[0023] The beneficial effects of the present invention are:

[0024] In the present invention, through the setting of the collecting mechanism, when the scum is treated, the rotating roller part extends below the liquid surface in the treatment pool, and when the rotating roller rotates, it drives the scraping plate to scrape the scum. At this time, the scum is collected between the scraping plate and the outer peripheral surface of the rotating roller. When the rotating roller continues to rotate, the scum between the scraping plate and the outer peripheral surface of the rotating roller can enter the collection box through the slag inlet, thereby realizing the collection of the scum, reducing the phenomenon of bubbles being easily broken during the scraping plate continuously pushing the scum, and can improve the treatment effect of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a partial cross-sectional view of the present invention.

[0027] Figure 3 It is a partial cross-sectional view showing the connection relationship between the collection assembly and the collection box of the present invention.

[0028] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0029] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0030] Figure 6 It is a partial cross-sectional view showing the connection relationship between the driving assembly and the defoaming plate of the present invention.

[0031] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle.

[0032] Figure 8 It is a partial cross-sectional view showing the connection relationship between the rack three and the treatment tank of the present invention.

[0033] Reference numerals:

[0034] 1. Treatment tank; 11. Collection area; 2. Scraping plate; 3. Driving mechanism; 4. Collection mechanism; 41. Collection assembly; 411. Rotating roller; 412. Scraping plate; 413. Give way groove; 42. Collection box; 421. Slag inlet; 422. Bottom plate; 5. Receiving mechanism; 51. Receiving plate; 52. Elastic part 1; 6. Torsion spring 1; 7. Defoaming mechanism; 71. Sealing assembly; 711. Sealing plate; 712. Elastic part 2; 72. Defoaming plate; 73. Driving assembly; 731. Rack 2; 732. Gear 2; 733. Gear 3; 734. Rack 3; 735. Elastic part 3; 8. Cleaning device; 81. Nozzle; 82. Water supply assembly; 9. Rack 1; 10. Gear 1. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] Reference Figure 1-Figure 8 A high-salt and high-COD sewage treatment device of the present invention comprises a treatment tank 1, a scraper plate 2 and a driving mechanism 3 for driving the scraper plate 2 to move. The driving mechanism 3 is installed on the treatment tank 1. The driving mechanism 3 uses a motor to drive a sprocket and a chain, and then drives the scraper plate 2 to move. The scraper plate 2 is installed on the chain, and the bottom end of the scraper plate 2 extends below the liquid surface of the treatment tank 1. The scraper plate 2 is provided with a collecting mechanism 4, and the collecting mechanism 4 is used to collect the scum in the treatment tank 1. When it is necessary to collect the scum in the treatment tank 1, the driving mechanism 3 is started to drive the scraper plate 2 to move along the trajectory of the chain. At this time, the scraper plate 2 can drive the collecting mechanism 4 to move, and the collecting mechanism 4 is used to collect the scum on the liquid surface.

[0037] Reference Figure 2-Figure 4 The collecting mechanism 4 includes a collecting assembly 41 for collecting the scum and a collecting box 42 for storing the collected scum. Figure 6 The collecting box 42 is fixedly arranged on the scraping plate 2. The collecting box 42 includes a box body and a bottom plate 422. A slag inlet 421 is opened on the box body of the collecting box 42. The bottom plate 422 is rotatably matched with the scraping plate 2. The scraping plate 2 is provided with two torsion springs (not shown in the figure) for driving the scraping plate 2 to reset.

[0038] Reference Figure 2 and Figure 3 The collecting assembly 41 includes a rotating roller 411 rotatably matched with the collecting box 42 and a scraping plate 412 for scraping the scum. The bottom end of the rotating roller 411 extends below the liquid level in the treatment tank 1. The scraping plate 412 is installed on the outer peripheral surface of the rotating roller 411. There are two scraping plates 412. The scraping plates 412 are in a "concave" shape. Figure 7 The scraping plate 412 includes a scraping part and a limiting part fixedly arranged at both ends of the scraping part along the length direction of the rotating roller 411. The limiting part is provided with a clearance groove 413 for liquid to pass through. The scraping plate 412 is rotatably matched with the rotating roller 411. The rotating roller 411 is provided with a torsion spring 6 for driving the scraping plate 412 to reset. One end of the torsion spring 6 is fixedly connected to the scraping plate 412, and the other end is fixedly connected to the rotating roller 411. When the rotating roller 411 rotates, it drives the scraping plate 412 to scrape the scum. The scum between the scraping plate 412 and the outer peripheral surface of the rotating roller 411 enters the collection box 42 through the scum inlet 421.

[0039] Reference Figure 2-Figure 4The treatment pool 1 is fixedly provided with a rack 9 along the moving direction of the scraper plate 2, and the rotating roller 411 is fixedly provided with a gear 10 meshing with the rack 9. When the scraper plate 2 drives the rotating roller 411 to move, the gear 10 can be driven to rotate through the rack 9, thereby driving the rotating roller 411 to rotate, and the rotating roller 411 drives the scraper plate 412 to rotate. During the rotation of the scraper plate 412, the scum can be scraped, and during the rotation of the scraper plate 412, the scraped scum is stored between the scraper plate 412 and the rotating roller 411. As the scraper plate 412 continues to rotate, the scum enters the collection box 42 through the scum inlet 421.

[0040] Reference Figure 6 and Figure 7 In order to make the scum better enter the collecting box 42, a receiving mechanism 5 is provided at the scum inlet 421 of the collecting box 42. The receiving mechanism 5 includes a receiving plate 51 that slides toward or away from the rotating roller 411 and an elastic member 52 for pushing the receiving plate 51 to slide toward the rotating roller 411. The receiving plate 51 is a triangular plate, and the receiving plate 51 is slidably fitted in the collecting box 42. The elastic member 52 directly adopts a spring, one end of the elastic member 52 is fixedly connected to the collecting box 42, and the other end is fixedly connected to the receiving plate 51. In the initial state, the elastic member 52 pushes the receiving plate 51 to slide, and one end of the receiving plate 51 abuts against the outer peripheral surface of the rotating roller 411. When the scraping plate 412 rotates, it can push the receiving plate 51 to slide in the direction away from the rotating roller 411 and compress the elastic member 52.

[0041] Reference Figure 3 , Figure 5 and Figure 6 The collecting box 42 is provided with a defoaming mechanism 7, which is used to eliminate bubbles of scum in the collecting box 42. The defoaming mechanism 7 includes a blocking component 71 for blocking the slag inlet 421, a defoaming plate 72 for pumping negative pressure to the collecting box 42, and a driving component 73 for driving the defoaming plate 72 to move. The blocking component 71 includes a blocking plate 711 for blocking the slag inlet 421 and an elastic member 2 712 for driving the blocking plate 711 to reset. The blocking plate 711 is slidably matched with the collecting box 42. The elastic member 2 712 directly adopts a spring. One end of the elastic member 2 712 is fixedly connected to the collecting box 42, and the other end is fixedly connected to the blocking plate 711. The defoaming plate 72 is slidably matched with the collecting box 42. The defoaming plate 72 is a T-shaped plate. After the blocking component 71 blocks the slag inlet 421, the defoaming plate 72 slides and pumps negative pressure to the collecting box 42 to defoam.

[0042] Reference Figure 3 , Figure 5 and Figure 6The driving assembly 73 includes a rack 2 731 fixedly mounted on the side of the defoaming plate 72, a gear 2 732 meshing with the rack 2 731, a gear 3 733 coaxially fixedly connected to the gear 2 732, a rack 3 734 for driving the gear 3 733 to rotate at intervals, and an elastic member 3 735 for driving the defoaming plate 72 to reset. The gear 2 732 rotates and cooperates with the collection box 42. Figure 8 , rack three 734 is fixedly set on the treatment pool 1, and the rack three 734 includes a horizontal section and an arc section. A plurality of rack three 734 of the horizontal section are arranged at intervals along the movement trajectory of the scraper plate 2, and the rack three 734 of the arc section is meshed with the bottom end of the gear three 733; the elastic member three 735 directly adopts a spring, and one end of the elastic member three 735 is fixedly connected to the defoaming plate 72, and the other end is fixedly connected to the collection box 42.

[0043] Reference Figure 3 , Figure 5 and Figure 6 When the scraper plate 2 is in motion, it drives the gear three 733 to mesh with the rack three 734 of the horizontal section, drives the gear three 733 to rotate, drives the gear two 732 to rotate, and during the rotation of the gear two 732, drives the rack two 731 to rise, drives the defoaming plate 72 to rise, and compresses the elastic member three 735. At this time, the gas pressure in the closed space formed by the top of the collecting box 42, the scraper plate 2, the bottom of the defoaming plate 72 and the sealing plate 711 becomes larger, which can push the sealing plate 711 down, stretch the elastic member two 712, and make the sealing plate 711 abut against the receiving plate 51 to block the slag inlet 421. When the defoaming plate 72 continues to rise, at the bottom of the collecting box 42, the scraper plate 2 and the sealing plate The closed space formed by the blocking plate 711 uses negative pressure to eliminate bubbles in the collection box 42; when the driving gear three 733 is no longer engaged with the rack three 734 of the horizontal section, the elastic member two 712 and the elastic member three 735 release the elastic restoring force, respectively driving the blocking plate 711 to rise and the defoaming plate 72 to descend for resetting. At this time, the slag inlet 421 is opened, and the scraping plate 412 scrapes the slag, and during the rotation of the scraping plate 412, the scraped slag is stored between the scraping plate 412 and the rotating roller 411. As the scraping plate 412 continues to rotate, the slag passes through the slag inlet 421 and enters the collection box 42; this step is repeated to collect and defoam the slag.

[0044] Reference Figure 5 , Figure 6 and Figure 8When the scraper plate 2 moves to the collection area 11, the scraper plate 2 drives the gear three 733 to move to the rack three 734 of the arc segment and meshes with the rack three 734. During the movement of the scraper plate 2, the gear three 733 is driven to rotate, the gear two 732 is driven to rotate, the rack two 731 is driven to descend, the defoaming plate 72 is driven to descend, and the elastic member three 735 is stretched. The bottom end of the defoaming plate 72 can push the bottom plate 422 to turn away, and the scum in the collection box 42 is pushed out of the collection box 42. The scum is collected in the collection area 11. When the scraper plate 2 drives the gear three 733 to move and no longer meshes with the rack three 734 of the arc segment, the elastic member three 735 drives the defoaming plate 72 to reset.

[0045] Reference Figure 1 and Figure 2 A collection area 11 for collecting scum is provided in the treatment pool 1. The liquid storage area and the collection area 11 are separated in the treatment pool 1. After the scum of the liquid to be treated is collected and processed, the driving mechanism 3 drives the scraper plate 2 to move into the collection area 11 to process the collected scum.

[0046] Reference Figure 1 and Figure 2 The treatment pool 1 is provided with a cleaning device 8, which includes a nozzle 81 for flushing the bottom plate 422 and a water supply assembly 82 for supplying water to the nozzle 81. The nozzle 81 is fixedly mounted on the water supply assembly 82, and the nozzle 81 is connected to the water supply assembly 82. The nozzle 81 is arranged in the collection area 11. The water supply assembly 82 directly communicates with the water supply pump, the water supply pipe and the water supply board. The water supply board is provided with a cavity connected with the nozzle 81. When the scraper plate 2 moves to the collection area 11, the bottom plate 422 is turned away, and the water supply assembly 82 is started at this time, and water is sprayed out through the nozzle 81 to flush the bottom plate 422 on the collection box 42.

[0047] The implementation principle of the high-salt and high-COD sewage treatment device of the present invention is as follows: when it is necessary to collect the scum in the treatment pool 1, the driving mechanism 3 is started to drive the scraper plate 2 to move along the trajectory of the chain. At this time, the scraper plate 2 can drive the collection mechanism 4 to move. When the scraper plate 2 drives the rotating roller 411 to move, the gear 10 can be driven to rotate through the rack 9, thereby driving the rotating roller 411 to rotate. The rotating roller 411 drives the scraper plate 412 to rotate. During the rotation of the scraper plate 412, the scum can be scraped, and during the rotation of the scraper plate 412, the scraped scum is stored between the scraper plate 412 and the rotating roller 411; as the scraper plate 412 continues to rotate, the scum passes through the receiving plate 51 and the slag inlet 421 and enters the collection box 42;

[0048] When the scraping plate 412 continues to rotate, it can push the receiving plate 51 to slide in the direction away from the rotating roller 411 and compress the elastic member 1 52. The receiving plate 51 is retracted into the collecting box 42. The scraping plate 412 continues to rotate. The scraping plate 412 contacts the collecting box 42 and pushes the scraping plate 412 to rotate, compressing the torsion spring 1 6. After the scraping plate 412 passes through the collecting box 42, the elastic restoring force of the torsion spring 1 6 drives the scraping plate 412 to rotate and reset.

[0049] At the same time, when the scraper plate 2 is in motion, the gear three 733 is driven to mesh with the rack three 734 of the horizontal section, which drives the gear three 733 to rotate, and drives the gear two 732 to rotate. During the rotation of the gear two 732, the rack two 731 is driven to rise, and the defoaming plate 72 is driven to rise, and the elastic member three 735 is compressed. At this time, the gas pressure in the closed space formed by the top of the collecting box 42, the scraper plate 2, the bottom end of the defoaming plate 72 and the blocking plate 711 becomes large, which can push the blocking plate 711 down, stretch the elastic member two 712, and the blocking plate 711 abuts against the receiving plate 51. , the slag inlet 421 is blocked, and when the defoaming plate 72 continues to rise, the closed space formed by the bottom of the collecting box 42, the scraping plate 2 and the blocking plate 711 uses negative pressure to eliminate the bubbles in the collecting box 42; when the driving gear three 733 is no longer engaged with the rack three 734 of the horizontal section, the elastic member two 712 and the elastic member three 735 release the elastic restoring force, respectively driving the blocking plate 711 to rise and the defoaming plate 72 to descend, and reset, at this time, the slag inlet 421 is opened, and the scraping plate 412 scrapes the slag, and this step is repeated to collect and defoam the slag;

[0050] When the scraper plate 2 moves to the collection area 11, the scraper plate 2 drives the gear three 733 to move to the rack three 734 of the arc segment and meshes with the rack three 734. During the movement of the scraper plate 2, the gear three 733 is driven to rotate, the gear two 732 is driven to rotate, the rack two 731 is driven to descend, the defoaming plate 72 is driven to descend, and the elastic member three 735 is stretched. The bottom end of the defoaming plate 72 can push the bottom plate 422 to turn open, and the scum in the collection box 42 is pushed out of the collection box 42. At this time, the water supply component 82 is started, and water is sprayed through the nozzle 81 to rinse the bottom plate 422 on the collection box 42. When the scraper plate 2 drives the gear three 733 to move, and the gear three 733 is no longer meshed with the rack three 734 of the arc segment, the elastic member three 735 drives the defoaming plate 72 to reset.

[0051] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high-salt and high-COD sewage treatment device, comprising a treatment tank (1), a scraper plate (2) and a driving mechanism (3) for driving the scraper plate (2) to move, characterized in that: The scraper plate (2) is provided with a collecting mechanism (4), the collecting mechanism (4) comprising a collecting assembly (41) for collecting scum and a collecting box (42) for storing the collected scum, the collecting box (42) being arranged on the scraper plate (2), the collecting assembly (41) comprising a rotating roller (411) rotatably matched with the collecting box (42) and a scraping plate (412) for scraping the scum, the bottom end portion of the rotating roller (411) extending below the liquid surface in the treatment tank (1), the scraping plate (412) being mounted on the outer circumference of the rotating roller (411), the collecting box (42) being provided with a scum inlet (421), when the rotating roller (411) rotates, the scraping plate (412) is driven to scrape the scum, and the scum between the scraping plate (412) and the outer circumference of the rotating roller (411) enters the collecting box (42) through the scum inlet (421); A defoaming mechanism (7) is arranged in the collection box (42), and the defoaming mechanism (7) comprises a blocking component (71) for blocking the slag inlet (421), a defoaming plate (72) for pumping negative pressure into the collection box (42), and a driving component (73) for driving the defoaming plate (72) to move, wherein the defoaming plate (72) is slidably engaged with the collection box (42), and after the blocking component (71) blocks the slag inlet (421), the defoaming plate (72) slides and pumps negative pressure into the collection box (42) to defoam.

2. A high-salt and high-COD sewage treatment device according to claim 1, characterized in that: The collecting box (42) is provided with a receiving mechanism (5) at the slag inlet (421), the receiving mechanism (5) comprising a receiving plate (51) that slides towards or away from the rotating roller (411) and an elastic member (52) used to push the receiving plate (51) to slide towards the rotating roller (411), the receiving plate (51) is slidably matched with the collecting box (42), and the scraping plate (412) is used to push the receiving plate (51) to slide away from the rotating roller (411).

3. A high-salt and high-COD sewage treatment device according to claim 2, characterized in that: The scraping plate (412) is rotatably matched with the rotating roller (411), and the rotating roller (411) is provided with a torsion spring (6) for driving the scraping plate (412) to return to its original position.

4. A high-salt and high-COD sewage treatment device according to claim 1, characterized in that: The blocking assembly (71) comprises a blocking plate (711) for blocking the slag inlet (421) and a second elastic member (712) for driving the blocking plate (711) to return to its original position; the blocking plate (711) is slidably fitted in the collection box (42); one end of the second elastic member (712) is connected to the collection box (42) and the other end is connected to the blocking plate (711).

5. A high-salt and high-COD sewage treatment device according to claim 4, characterized in that: The driving assembly (73) comprises a second rack (731) mounted on the side of the defoaming plate (72), a second gear (732) meshing with the second rack (731), a third gear (733) coaxially connected to the second gear (732), a third rack (734) for driving the third gear (733) to rotate at intervals, and a third elastic member (735) for driving the defoaming plate (72) to reset, wherein the third rack (734) is arranged on the collection box (42).

6. A high-salt and high-COD sewage treatment device according to claim 1, characterized in that: A collection area (11) for collecting scum is provided in the treatment pool (1); the collection box (42) comprises a box body and a bottom plate (422); the bottom plate (422) is rotatably engaged with the scraper plate (2); and the scraper plate (2) is provided with a second torsion spring for driving the scraper plate (2) to return to its original position.

7. A high-salt and high-COD sewage treatment device according to claim 6, characterized in that: The treatment pool (1) is provided with a cleaning device (8), the cleaning device (8) comprising a nozzle (81) for flushing the bottom plate (422) and a water supply assembly (82) for supplying water to the nozzle (81), the nozzle (81) being arranged in the collection area (11).

8. A high-salt and high-COD sewage treatment device according to claim 1, characterized in that: The scraping plate (412) comprises a scraping portion and limiting portions arranged at both ends of the scraping portion along the length direction of the rotating roller (411), and the limiting portions are provided with a clearance groove (413) for liquid to pass through.

9. A high-salt and high-COD sewage treatment device according to claim 1, characterized in that: The treatment pool (1) is provided with a rack (9) along the movement direction of the scraper plate (2), and the rotating roller (411) is provided with a gear (10) meshing with the rack (9).

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