Cleaning device for wastewater suspended matters

Abstract

The utility model provides a waste water suspended matter cleaning device which comprises a device body, the device body comprises a water inlet pipe, a primary cleaning part, a secondary cleaning part and a water drainage pipe which are sequentially communicated in the water flow direction, and a rotary drum grating is arranged in the primary cleaning part and used for intercepting floating matter in waste water; an aeration pipe is arranged on the side wall of the lower part of the secondary cleaning part, and a scum cleaning mechanism is arranged at the upper part of the secondary cleaning part and is used for collecting scum; a sand collecting groove is formed in the bottom of the secondary cleaning part and used for collecting gravel. The primary cleaning part is used for intercepting large-particle floating objects by utilizing a rotary drum grid, the secondary cleaning part is used for further treating wastewater possibly penetrating through the rotary drum grid, tiny suspended solids and bubbles in the wastewater are combined to form scum through the aeration effect of an aeration pipe, the scum is collected by a scum cleaning mechanism, and gravels are deposited into a sand collecting tank along with the cyclone centrifugal effect; and the stability and the reliability of the cleaning effect of the suspended matters are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a cleaning device for wastewater suspended solids. Background Art

[0002] The removal of suspended matter in wastewater is an important part of the wastewater treatment process. Its main purpose is to remove suspended matter, floating matter and other impurities in the wastewater to improve the water quality and facilitate subsequent treatment or discharge to meet the standards.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] Most of the current floating solids cleaning devices only use grilles or screens for single cleaning. However, a single cleaning process often cannot completely remove all suspended and floating matter in the wastewater, especially small-size, light or high-viscosity pollutants, which can easily penetrate the grille, resulting in unstable effluent water quality.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a cleaning device for wastewater suspended solids to solve the design defects of the cleaning device for suspended solids in the prior art. A single cleaning process often cannot completely remove all suspended solids and floating solids in the wastewater, especially small-particle, light-weight or high-viscosity pollutants, which easily penetrate the grid and cause the technical problem of unstable effluent water quality. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a cleaning device for wastewater suspended matter, comprising a device body, wherein the device body comprises a water inlet pipe, a primary cleaning part, a secondary cleaning part and a drain pipe which are sequentially connected along the water flow direction; a rotary drum grid is arranged in the primary cleaning part for intercepting floating matter in the wastewater; an aeration pipe is arranged on the side wall of the lower part of the secondary cleaning part; a scum cleaning mechanism is arranged on the upper part of the secondary cleaning part for collecting scum; a sand collecting trough is arranged at the bottom of the secondary cleaning part for collecting sand and gravel.

[0009] Preferably, the rotary drum grille includes a water baffle, a bar mesh cylinder, a scraper brush, a flushing pipe and a first screw conveyor, the water baffle is obliquely arranged on the bottom plate of the primary cleaning portion, the bar mesh cylinder is rotatably connected to the water baffle, the inlet end of the bar mesh cylinder is transmission-connected to the first screw shaft of the first screw conveyor through a transmission connecting piece, the scraper brush and the flushing pipe are respectively mounted on the water baffle and are located above the bar mesh cylinder; the discharge end of the first screw conveyor is connected to the floating object collection device through a first vertical conveying pipe.

[0010] Preferably, the scraping brush and the flushing pipe extend in an axial direction parallel to the grid bar mesh cylinder.

[0011] Preferably, it also includes a second screw conveyor and a third screw conveyor, the second screw conveyor is arranged at the bottom of the sand collecting trough, and the second screw shaft of the second screw conveyor extends along the length direction of the sand collecting trough, the discharge end of the second screw conveyor is connected with the feed end of the third screw conveyor, the third screw shaft of the third screw conveyor is inclined, and the discharge end of the third screw conveyor is connected with the grit collection device through a second vertical conveying pipe.

[0012] Preferably, the aeration pipe extends along the length direction of the secondary cleaning section and is connected to the blower through an air supply pipe.

[0013] Preferably, the secondary cleaning section has a first side wall and a second side wall extending along the length direction and arranged opposite to each other, the second side wall includes a straight section, a first inclined section and a second inclined section arranged in sequence from top to bottom, the straight section is arranged parallel to the first side wall, the angle between the first inclined section and the horizontal plane is smaller than the angle between the second inclined section and the horizontal plane, the sand collecting trough is formed between the second inclined section, the bottom plate of the secondary cleaning section and the first side wall, and the aeration pipe is arranged on the first side wall and is located above the sand collecting trough.

[0014] Preferably, the scum cleaning mechanism includes a scum collecting trough, a driving part, a frame, and a transmission part and a scraper arranged on the frame, the frame is arranged at the upper part of the straight section and extends along the length direction of the secondary cleaning part, the scraper extends along the width direction of the secondary cleaning part and is connected to the transmission part through a connecting plate, the transmission part is in a moving track of the frame, the moving track extends along the length direction of the frame, and the driving part drives the transmission part to drive the scraper to reciprocate along the moving track; the scum collecting trough is a bucket-shaped structure and is arranged close to the primary cleaning part, the scum collecting trough is arranged on the first inclined section, and the scum collecting trough is transported to subsequent processing equipment through a screw pump.

[0015] Preferably, a collecting groove is provided at the bottom of the scraper on one side close to the scum collecting tank.

[0016] Preferably, a guide slope is provided at the inlet of the scum collecting trough, the guide slope is located on the moving path of the scraper, and the guide slope is an inverted V-shaped structure.

[0017] The preferred technical solution of the utility model can also produce at least the following technical effects:

[0018] The utility model effectively avoids the design defects of the cleaning device for suspended matter existing in the prior art. A single cleaning process often cannot completely remove all suspended matter and floating matter in the wastewater, especially small-size, light-weight or high-viscosity pollutants. These substances easily penetrate the grille, resulting in technical problems such as unstable effluent water quality. The utility model provides a cleaning device for suspended matter in wastewater, including a device body, the device body includes an inlet pipe, a primary cleaning part, a secondary cleaning part and a drain pipe connected in sequence along the water flow direction, a rotary drum grille is arranged in the primary cleaning part for intercepting floating matter in the wastewater; an aeration pipe is arranged on the side wall of the lower part of the secondary cleaning part, and a scum cleaning mechanism is arranged on the upper part of the secondary cleaning part for collecting scum; a sand collecting trough is arranged at the bottom of the secondary cleaning part for collecting gravel. The utility model combines the primary cleaning part with the secondary cleaning part to perform multi-stage cleaning of suspended matter and floating matter in the wastewater. The primary cleaning section uses the drum screen to intercept large floating particles, and the secondary cleaning section further processes small-diameter, light or high-viscosity pollutants that may penetrate the drum screen. Through the aeration effect of the aeration pipe, the tiny suspended matter and bubbles in the wastewater in the secondary cleaning section can be combined to form scum, which is easier to be collected by the scum cleaning mechanism. The sand and gravel are deposited in the sand collection tank with the centrifugal effect of the cyclone, which improves the cleaning efficiency and facilitates the subsequent classification and treatment of different types of waste. By combining multi-stage cleaning and aeration-enhanced cleaning, the adaptability to different types of wastewater is improved, ensuring the stability and reliability of the cleaning effect of floating objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a wastewater floating matter cleaning device provided by the utility model;

[0021] Figure 2It is a cross-sectional schematic diagram of a wastewater floating matter cleaning device provided by the utility model;

[0022] Figure 3 The utility model discloses a structural schematic diagram of a scum cleaning mechanism of a wastewater floating matter cleaning device.

[0023] In the figure:

[0024] 1. Water inlet pipe; 2. Primary cleaning section; 3. Secondary cleaning section; 31. First side wall; 32. Straight section; 33. First inclined section; 34. Second inclined section; 35. Sand collecting trough; 4. Drain pipe; 5. Drum grille; 51. Water retaining plate; 52. Slag brush; 53. Bar mesh cylinder; 6. First screw conveyor; 7. Second screw conveyor; 8. Third screw conveyor; 9. First vertical conveying pipe; 10. Second vertical conveying pipe; 11. Aeration pipe; 12. Frame; 13. Scraper; 131. Collecting groove; 14. Scum collecting trough; 15. Guide slope; 16. Connecting plate; 17. Buffer baffle; 18. Grille plate; 19. Driving section. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] like Figure 1-Figure 3 As shown, the utility model provides a cleaning device for wastewater suspended matter, including a device body, the device body including a water inlet pipe 1, a primary cleaning part 2, a secondary cleaning part 3 and a drain pipe 4 which are sequentially connected along the water flow direction, a rotary drum grid 5 is arranged in the primary cleaning part 2 for intercepting floating matter in the wastewater; an aeration pipe 11 is arranged on the side wall of the lower part of the secondary cleaning part 3, a scum cleaning mechanism is arranged on the upper part of the secondary cleaning part 3 for collecting scum; a sand collecting trough 35 is arranged at the bottom of the secondary cleaning part 3 for collecting sand and gravel.

[0027] The suspended matter and floating matter in the wastewater are cleaned in multiple stages by combining the primary cleaning section 2 and the secondary cleaning section 3. The primary cleaning section 2 uses the drum screen 5 to intercept large floating matter, and the secondary cleaning section 3 further processes small-diameter, light-weight or high-viscosity pollutants that may penetrate the drum screen 5. Through the aeration effect of the aeration pipe 11, the tiny suspended matter and bubbles in the wastewater in the secondary cleaning section 3 can be combined to form scum, which is easier to be collected by the scum cleaning mechanism. The sand and gravel are deposited in the sand collecting tank 35 with the centrifugal effect of the cyclone, which improves the cleaning efficiency and facilitates the subsequent classification and treatment of different types of waste. By combining multi-stage cleaning and aeration-enhanced cleaning, the adaptability to different types of wastewater is improved, and the stability and reliability of the cleaning effect of floating matter are ensured.

[0028] As an optional embodiment, the rotary drum screen 5 includes a water baffle 51, a bar mesh cylinder 53, a scraper brush 52, a flushing pipe and a first screw conveyor 6, the water baffle 51 is obliquely arranged on the bottom plate of the primary cleaning part 2, the bar mesh cylinder 53 is rotatably connected to the water baffle 51, the inlet end of the bar mesh cylinder 53 is transmission-connected to the first screw shaft of the first screw conveyor 6 through a transmission connecting piece, the scraper brush 52 and the flushing pipe are respectively installed on the water baffle 51 and are located above the bar mesh cylinder 53; the discharge end of the first screw conveyor 6 is connected to the floating object collection device through a first vertical conveying pipe 9.

[0029] The function of the water baffle 51 is to guide the water flow direction so that the waste water can smoothly flow into the bar mesh cylinder 53 through the water inlet pipe 1. At the same time, the water baffle 51 also plays a certain buffering role, reducing the impact of waste water on the bar mesh cylinder 53 and the screw shaft of the first screw conveyor 6.

[0030] The inlet end of the grid net cylinder 53 faces the water inlet pipe 1. The aperture of the grid net cylinder 53 can be set according to the use requirements, as long as it can intercept most of the large particles of floating objects while allowing wastewater to pass through. When the grid net cylinder 53 rotates, the intercepted floating objects will move with it.

[0031] The scraper brush 52 is used to remove floating objects attached to the bar mesh cylinder 53, so that the floating objects are separated from the bar mesh cylinder 53 and fall into the feed trough on the first spiral shaft. As the bar mesh cylinder 53 rotates, the scraper brush 52 will continuously scrape off the floating objects on the bar mesh cylinder 53.

[0032] The function of the flushing pipe is to spray high-pressure water flow to the bar mesh cylinder 53, further remove floating objects attached to the bar mesh cylinder 53, separate the floating objects from the bar mesh cylinder 53, and drop into the feed trough on the first spiral shaft. As the bar mesh cylinder 53 rotates, the flushing pipe will continuously flush the floating objects on the bar mesh cylinder 53.

[0033] The first screw conveyor 6 is used to convey the floating objects cleaned from the grid mesh cylinder 53 to the discharge end, and is connected to the floating object collecting device through the first vertical conveying pipe 9 to achieve continuous cleaning and collection of the floating objects.

[0034] The first screw shaft of the first screw conveyor 6 drives the bar mesh cylinder 53 and the suspended matter to rotate synchronously when rotating. When the suspended matter rotates to the upper part, due to gravity, the cleaning of the scraper brush 52 and the flushing effect of the flushing pipe, it falls into the feed trough of the first screw shaft of the screw conveyor, and is transported to the discharge end as the screw shaft rotates, and finally discharged into the floating matter collection device through the vertical conveying pipe, so as to effectively intercept, clean and collect the floating matter. Among them, the rotary drum grille 5 and the first screw conveyor 6 adopt the existing technology, which will not be described in detail here.

[0035] As an optional embodiment, the scraping brush 52 and the flushing pipe extend in an axial direction parallel to the grid bar net cylinder 53 .

[0036] The scraper brush 52 and the flushing pipe are sequentially arranged on the upper part of the grid bar mesh cylinder 53 along the circumference of the grid bar mesh cylinder 53, so that the scraper brush 52 and the flushing pipe can effectively cover the surface of the grid bar mesh cylinder 53, thereby achieving a comprehensive cleaning effect.

[0037] As an optional embodiment, the secondary cleaning section 3 has a first side wall 31 and a second side wall extending along the length direction and arranged opposite to each other, the second side wall includes a straight section 32, a first inclined section 33 and a second inclined section 34 arranged in sequence from top to bottom, the straight section 32 is arranged parallel to the first side wall 31, the angle between the first inclined section 33 and the horizontal plane is smaller than the angle between the second inclined section 34 and the horizontal plane, a sand collecting trough 35 is formed between the second inclined section 34, the bottom plate of the secondary cleaning section 3 and the first side wall 31, and the aeration pipe 11 is arranged on the first side wall 31 and is located above the sand collecting trough 35.

[0038] The first inclined section 33 and the second inclined section 34 are provided to change the direction of the water flow, and to enhance the centrifugal effect of the water flow by gradually increasing the inclination angle, thereby promoting the deposition of heavy impurities. When the wastewater flows through the second inclined section 34, the water flow velocity increases slightly due to the increase in the inclination angle, and the centrifugal force generated also increases accordingly, so that the heavy impurities such as sand and gravel in the wastewater are pushed to the sand collecting tank 35.

[0039] The wastewater intercepted and treated by the grid mesh tube 53 enters the secondary cleaning part 3. The wastewater also contains sand and oil impurities. The aeration pipe 11 injects bubbles into the wastewater, causing the wastewater to form an up and down circular motion on the cross section. The bubbles attached to light impurities such as oil impurities and suspended matter rise to form scum, and heavy impurities such as gravel are deposited in the sand collecting tank 35 at the bottom due to the centrifugal action of the cyclone. At the same time, the agitation of bubbles and the cyclone action of water generated during the aeration process can also remove organic pollutants attached to the surface of heavy impurities such as gravel.

[0040] As an optional embodiment, the aeration pipe 11 extends along the length direction of the secondary cleaning section 3 and is connected to the blower through an air supply pipe.

[0041] The blower provides sufficient air source for the aeration pipe 11, ensuring the continuity and stability of the aeration process and providing a continuous and stable supply of bubbles for the wastewater.

[0042] As an optional embodiment, it also includes a second screw conveyor 7 and a third screw conveyor 8. The second screw conveyor 7 is arranged at the bottom of the sand collecting trough 35, and the second screw shaft of the second screw conveyor 7 extends along the length direction of the sand collecting trough 35. The discharge end of the second screw conveyor 7 is connected to the feed end of the third screw conveyor 8. The third screw shaft of the third screw conveyor 8 is inclined, and the discharge end of the third screw conveyor 8 is connected to the grit collection device through the second vertical conveying pipe 10.

[0043] Furthermore, a discharging end of the second screw conveyor 7 is arranged close to the primary cleaning part 2 .

[0044] The second screw conveyor 7 directly contacts the sand and gravel deposited at the bottom of the sand collecting trough 35, and transports the sand and gravel deposited at the bottom of the sand collecting trough 35 to its discharge end along the axial direction of the second screw shaft through the rotation of the second screw shaft. After the sand and gravel reach the discharge end of the second screw conveyor 7, it will smoothly enter the feed end of the third screw conveyor 8. Since the third screw shaft of the third screw conveyor 8 is inclined, the sand and gravel can be gradually increased in height during the transportation process. When the sand and gravel reach the discharge end of the third screw conveyor 8, it falls into the sand and gravel collection device along the second vertical conveying pipe 10 under the action of gravity. Among them, the second screw conveyor 7 and the third screw conveyor 8 adopt the existing technology, which will not be elaborated here.

[0045] As an optional implementation, Figure 2 , 3 As shown, the scum cleaning mechanism includes a scum collecting trough 14, a driving part 19, a frame 12, and a transmission part and a scraper 13 arranged on the frame 12. The frame 12 is arranged at the upper part of the straight section 32 and extends along the length direction of the secondary cleaning part 3. The scraper 13 extends along the width direction of the secondary cleaning part 3 and is connected to the transmission part through a connecting plate 16. The transmission part is in a moving track of the frame 12, and the moving track extends along the length direction of the frame 12. The driving part 19 drives the transmission part to drive the scraper 13 to reciprocate along the moving track; the scum collecting trough 14 is a bucket-shaped structure and is arranged close to the primary cleaning part 2. The scum collecting trough 14 is arranged on the first inclined section 33, and the bottom of the scum collecting trough 14 is transported to the subsequent processing equipment through a screw pump.

[0046] Furthermore, a grid plate 18 is provided at the bottom of the frame 12 on the side away from the straight section 32. The grid plate 18 is inclined from top to bottom toward the aeration pipe 11.

[0047] During the rising process, the scum moves upward along the inclined surface of the grid plate 18, which has a certain interception effect on the scum and can also play a certain guiding role. After being intercepted, the scum moves upward along the inclined surface of the grid plate 18 and finally reaches the area below the scraper 13. When the scraper 13 reciprocates along the length direction of the frame 12, the scum can be easily scraped into the scum collecting tank 14.

[0048] The driving unit 19 is the power source of the scum cleaning mechanism and is responsible for providing the driving force required for the scraper 13 to reciprocate.

[0049] The transmission part is connected to the driving part 19, and is responsible for transmitting the power generated by the driving part 19 to the scraper 13, so that it can reciprocate along the length direction of the frame 12. Among them, the driving part 19 and the transmission part adopt the existing technology, for example, the driving part 19 adopts a motor, the transmission part adopts a gear chain transmission mechanism, and the scraper 13 is connected to the chain through the connecting plate 16, which will not be described in detail here.

[0050] As an optional embodiment, a collecting groove 131 is provided at the bottom of one side of the scraper 13 close to the scum collecting groove 14 , so as to effectively collect the scum on the scraper 13 .

[0051] When the driving part 19 starts driving the transmission part to drive the scraper 13 frame 12 to move, during the movement of the scraper 13, the surface of the scraper 13 and the collecting groove 131 will contact the scum on the water surface, driving the scum to gather in the direction of the scum collecting tank 14.

[0052] As an optional implementation, a guide slope 15 is provided at the inlet of the scum collecting trough 14 . The guide slope 15 is located on the moving path of the scraper 13 , and the guide slope 15 is an inverted V-shaped structure.

[0053] The guide slope 15 is provided at the lower portion of the straight section 32 .

[0054] When the scraper 13 moves, it contacts the guide slope 15 and is subjected to an upward force, which drives the scraper 13 to rotate. The space between the scraper 13 and the guide slope 15 gradually decreases, and the scraper 13 fits more closely to the guide slope 15, driving the scum to gather along the inclined direction of the guide slope 15. Due to the inclination of the guide slope 15 and the pushing effect of the scraper 13, the scum can slide smoothly into the scum collecting trough 14.

[0055] As an optional implementation, a buffer baffle 17 is provided near the inlet of the drain pipe 4 to allow wastewater to enter the drain pipe 4 more smoothly.

[0056] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0057] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "an example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cleaning device for wastewater suspended solids, characterized in that: The device comprises a main body, which comprises a water inlet pipe, a primary cleaning part, a secondary cleaning part and a drain pipe which are sequentially connected along the water flow direction; a rotary drum grid is arranged in the primary cleaning part for intercepting floating objects in the wastewater; an aeration pipe is arranged on the side wall of the lower part of the secondary cleaning part; a scum cleaning mechanism is arranged on the upper part of the secondary cleaning part for collecting scum; a sand collecting trough is arranged at the bottom of the secondary cleaning part for collecting sand and gravel.

2. A wastewater floating matter cleaning device according to claim 1, characterized in that: The rotary drum grille includes a water baffle, a bar mesh cylinder, a scraper brush, a flushing pipe and a first screw conveyor. The water baffle is obliquely arranged on the bottom plate of the primary cleaning portion. The bar mesh cylinder is rotatably connected to the water baffle. The inlet end of the bar mesh cylinder is transmission-connected to the first screw shaft of the first screw conveyor through a transmission connector. The scraper brush and the flushing pipe are respectively mounted on the water baffle and are located above the bar mesh cylinder. The discharge end of the first screw conveyor is connected to the floating object collection device through a first vertical conveying pipe.

3. A wastewater floating matter cleaning device according to claim 2, characterized in that: The scraping brush and the flushing pipe extend in an axial direction parallel to the grid bar mesh cylinder.

4. A wastewater floating matter cleaning device according to claim 1, characterized in that: It also includes a second screw conveyor and a third screw conveyor, the second screw conveyor is arranged at the bottom of the sand collecting trough, and the second screw shaft of the second screw conveyor extends along the length direction of the sand collecting trough, the discharge end of the second screw conveyor is connected with the feed end of the third screw conveyor, the third screw shaft of the third screw conveyor is inclined, and the discharge end of the third screw conveyor is connected with the grit collection device through a second vertical conveying pipe.

5. The wastewater suspended solids cleaning device according to claim 1, characterized in that: The aeration pipe extends along the length direction of the secondary cleaning part and is connected to the blower through an air delivery pipe.

6. The wastewater suspended solids cleaning device according to claim 1, characterized in that: The secondary cleaning part has a first side wall and a second side wall extending in the length direction and arranged opposite to each other, the second side wall includes a straight section, a first inclined section and a second inclined section arranged in sequence from top to bottom, the straight section is arranged parallel to the first side wall, the angle between the first inclined section and the horizontal plane is smaller than the angle between the second inclined section and the horizontal plane, the sand collecting trough is formed between the second inclined section, the bottom plate of the secondary cleaning part and the first side wall, and the aeration pipe is arranged on the first side wall and is located above the sand collecting trough.

7. A wastewater floating matter cleaning device according to claim 6, characterized in that: The scum cleaning mechanism includes a scum collecting trough, a driving part, a frame, and a transmission part and a scraper arranged on the frame. The frame is arranged at the upper part of the straight section and extends along the length direction of the secondary cleaning part. The scraper extends along the width direction of the secondary cleaning part and is connected to the transmission part through a connecting plate. The transmission part is in a moving track of the frame, and the moving track extends along the length direction of the frame. The driving part drives the transmission part to drive the scraper to reciprocate along the moving track. The scum collecting trough is a bucket-shaped structure and is arranged close to the primary cleaning part. The scum collecting trough is arranged on the first inclined section. The scum collecting trough is transported to subsequent processing equipment through a screw pump.

8. The wastewater suspended solids cleaning device according to claim 7, characterized in that: A collecting groove is arranged at the bottom of the scraper on one side close to the scum collecting tank.

9. The wastewater suspended solids cleaning device according to claim 8, characterized in that: A guide slope is provided at the inlet of the scum collecting trough. The guide slope is located on the moving path of the scraper and is an inverted V-shaped structure.

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