Device and method for cleaning floating sludge from the secondary sedimentation tank inlet channel

Abstract

This invention provides a device and method for cleaning floating sludge from the inlet channel of a secondary sedimentation tank. The device includes a track, a sludge pump, a sludge-driving device, an adjustable gate, and a sludge discharge tank. The adjustable gate separates a sludge discharge tank at the end of the inlet channel of the secondary sedimentation tank. The adjustable gate includes a fixed gate and a chute structure, the chute structure being height-adjustably mounted on the fixed gate. A track is erected above the inlet channel of the secondary sedimentation tank, extending circumferentially along the channel. The sludge-driving device is slidably mounted on the track and can drive the sludge from the inlet channel into the sludge discharge tank. Through the sludge-driving device, this invention can discharge the sludge from the inlet channel to the sludge discharge tank, and then the sludge pump can discharge the floating sludge to a sludge storage tank, thus completely removing the floating sludge from the wastewater treatment system.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a device for cleaning floating sludge in the inlet channel of a secondary sedimentation tank, and more particularly to an automatic floating sludge cleaning device for a circumferentially inlet and outlet secondary sedimentation tank inlet channel. Background Technology

[0002] Secondary sedimentation tanks are also called secondary settling tanks. The function of secondary sedimentation tanks is to separate sludge from water, clarify the mixed liquor, collect the supernatant and send it to the next treatment unit, while simultaneously settling and concentrating the sludge and returning the separated sludge to the biological treatment section.

[0003] The weekly inlet and outlet type secondary sedimentation tank is a commonly used type of secondary sedimentation tank in sewage treatment plants. The working principle is that the raw sewage flows into the inlet channel located around the tank. There is an inlet hole at the bottom of the inlet channel, and the suspended particles are evenly introduced into the tank through the inlet hole to settle. After sedimentation, the clear water flows out of the sedimentation tank through the surrounding drainage channel.

[0004] The width of the inlet channels for the two sedimentation tanks varies; the channels are wider and the water flow is faster near the inlet, narrowing and slowing down further away from the inlet. The raw water entering the inlet channels contains a large amount of sludge, some of which ages and forms floating sludge that accumulates at the end of the channels. In severe cases, this floating sludge can cover the entire surface of the water in the inlet channels. This floating sludge is unsightly and can also emit a foul odor when the temperature is high.

[0005] Currently, the sludge is mostly removed manually by shoveling or by periodically opening a sluice gate at the end of the inlet channel. Manual shoveling requires personnel to stand by the secondary sedimentation tank and use scoops or nets to remove the sludge, which is time-consuming, labor-intensive, and dangerous.

[0006] Opening the sluice gate at the end of the channel to discharge sludge also requires personnel to drive the floating sludge into the sludge discharge well. However, after entering the sludge discharge well, the floating sludge reaches the pretreatment section of the wastewater treatment plant and re-enters the biological treatment system. The floating sludge contains some surviving bacteria and a large number of dead bacteria and microorganisms. The surviving bacteria and microorganisms consume the COD of the wastewater influent, reducing the COD concentration; the dead bacteria and microorganisms are converted into inorganic matter, reducing the concentration of organic bacteria and microorganisms in the biological treatment system. Both of these situations have an adverse impact on the biological treatment process of the wastewater treatment plant.

[0007] The best way to handle the floating sludge in the secondary sedimentation tank inlet channel is to discharge it into the biochemical system and then dewater it. Therefore, how to discharge the floating sludge into the inlet channel is a pressing technical problem that needs to be solved. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device and method for cleaning floating sludge from the inlet channel of a secondary sedimentation tank.

[0009] A device for cleaning floating sludge in the inlet channel of a secondary sedimentation tank according to the present invention includes a track, a walking sludge-driving device, an adjustable gate, and a sludge discharge tank. An adjustable gate separates a sludge discharge pool at the end of the inlet channel of the secondary sedimentation tank; The adjustable gate includes a fixed gate and a chute structure, wherein the chute structure is installed on the fixed gate with adjustable height; A track is installed above the inlet channel of the secondary sedimentation tank; the track extends circumferentially along the inlet channel. The walking sludge-driving device is slidably installed on the track, and the walking sludge-driving device can drive the sludge in the inlet channel of the secondary sedimentation tank to the sludge discharge tank.

[0010] Preferably, it also includes a stop block; the stop block is mounted on the track; The walking mud-driving device includes a walking mud-driving device control box, a current collector, a motor, a walking trolley, a main support, a net support, a net, a square guide rod, an electric push rod, a stop, a proximity switch, a connecting beam, and an adjusting pad assembly. The wheels of the traveling trolley are attached to the track and can move along the track under the drive of the motor. The connecting beam is installed under the traveling trolley, and the adjusting pad group and the main bracket are installed in sequence under the connecting beam. The three are connected and fixed with bolts. The main support is equipped with a width adaptive structure, which includes two guide wheel supports on the left and right sides and a torsion spring installed between the two guide wheel supports; each guide wheel support can rotate on the main support, and each guide wheel support is also equipped with a guide wheel, which contacts the side walls of the water inlet channel; A square guide rod is mounted on each of the guide wheel brackets on the left and right sides, and the square guide rod extends upward. There are two electric push rods; the tails of the two electric push rods are respectively connected to the top of two square guide rods, and the telescopic ends of the two electric push rods are respectively connected to two net-catching brackets; one net is installed on two net-catching brackets. The control box of the walking mud-driving device is used to control the motor and electric push rod, thereby controlling the forward and backward movement, travel distance, and lifting and lowering of the mud-driving device; The stop block can trigger a proximity switch; the stop block is installed on the traveling trolley.

[0011] Preferably, the walking mud-driving device also includes a guide plate; Guide plates are installed on the guide wheel brackets on both the left and right sides; the guide plates extend obliquely toward the side wall of the inlet channel.

[0012] Preferably, the scooping net comprises a nylon net with a mesh.

[0013] Preferably, it also includes a limit switch, a spray pump, a spray head, a spray pipe, and a spray pipe support; The spray water pump is placed in the drainage ditch of the secondary sedimentation tank, and the pump outlet is connected to the spray pipe; the limit switch is installed on the rail, and the start and stop of the spray water pump is controlled by the stop iron touching the limit switch; A spray pipe support is installed at the end of the track. The spray pipe is installed on the spray pipe support and a spray head is installed on the spray pipe. There are two spray heads: one sprays at an angle towards the sludge discharge tank, and the other is installed directly above the sludge discharge tank and sprays downwards to break up the floating sludge.

[0014] Preferably, it also includes a liquid level control switch, a sludge pump, and a sludge discharge pipe; The sludge discharge tank is equipped with a sludge discharge pump, a liquid level control switch, and a sludge discharge pipe; the liquid level control switch is electrically connected to control the sludge discharge pump, and the sludge discharge pump is connected to an external sludge storage tank through the sludge discharge pipe.

[0015] Preferably, it also includes a sliding contact line, which is installed on the side of the track and is used to provide power to the walking mud-driving device; The current collector is in contact with the sliding contact line.

[0016] Preferably, the track is an I-beam, and the length of the track is 1 / 6 to 1 / 4 of the total length of the inlet channel.

[0017] Preferably, the chute structure is installed on the fixed gate via a slotted hole and bolts.

[0018] According to the present invention, a method for cleaning floating sludge in an inlet channel is provided, which uses the aforementioned cleaning device for the floating sludge inlet channel of the secondary sedimentation tank. The method further includes dividing the inlet channel area where sludge needs to be removed into multiple sections and cleaning them section by section in order of distance from the sludge discharge tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, through the setting of a walking sludge-driving device, can discharge the sludge in the inlet channel to the sludge discharge tank, and then the sludge discharge pump discharges the floating sludge to the sludge storage tank, so that the floating sludge is completely removed from the sewage treatment system.

[0020] 2. The present invention enables the guide wheels on both sides to roll close to the side walls of the water inlet channel through the setting of the width adaptive structure, so that the opening and closing degree of the net can adapt to the changing width of the water inlet channel.

[0021] 3. Considering the characteristics of floating mud and the limited capacity of the scooping net, this invention proposes a segmented method for cleaning floating mud from the intake channel. Attached Figure Description

[0022] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the view from direction A; Figure 3 yes Figure 2 Schematic diagram of BB cross-section; Figure 4 This is a schematic diagram of the main view of the walking mud-driving device; Figure 5 yes Figure 4 A schematic diagram of the left view; Figure 6 yes Figure 5 CC cross-sectional view schematic diagram; Figure 7 This is a schematic diagram of the working process of the present invention; Figure 8 yes Figure 7 Schematic diagram of DD cross-section; Figure 9 This is an EE cross-sectional view of an adjustable gate.

[0023] The diagram shows: Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] This invention provides a device for cleaning floating sludge from the inlet channel of a secondary sedimentation tank, such as... Figures 1-9 As shown, it includes a track 1, track support 2, sliding contact line 3, walking mud-driving device 4, stop block 5, limit switch 6, spray head 7, spray pipe 8, spray pipe support 9, spray water pump 10, adjustable gate 11, control box 12, mud discharge tank 13, liquid level control switch 14, mud discharge pump 15, and mud discharge pipe 16.

[0026] like Figure 1 , Figure 2 as well as Figure 7 As shown, the adjustable gate 11 separates a sludge discharge pool 13 at the end of the inlet channel 17 of the secondary sedimentation tank. Figure 9As shown, the adjustable gate 11 includes a fixed gate 1102 and a chute structure 1101. The fixed gate 1102 is fixed to the inlet channel 17 pool body with expansion bolts, sealing off a portion of the raw water area from the bottom of the pool to below the water surface. The remaining portion is sealed by the adjustable chute. The chute structure 1101 is height-adjustable and installed on top of the fixed gate 1102. In a preferred embodiment, the chute structure 1101 is installed on the fixed gate 1102 via a slotted hole and bolts, so that the height of the chute structure 1101 on the fixed gate 1102 is adjustable. Specifically, when using this invention, the operator adjusts the position of the adjustable chute according to the water level in the inlet channel to ensure that the upper edge of the adjustable chute (i.e., the highest point of the chute structure 1101) is flush with the water surface of the inlet channel 17. In a preferred embodiment, a rubber sealing gasket 1103 is also provided between the fixed gate 1102 and the chute structure 1101 to prevent leakage.

[0027] Above the inlet channel 17 of the secondary sedimentation tank, a track 1 is erected at a certain distance from the adjustable gate 11, and is suspended in the air by track supports 2. The track 1 is an I-beam. Figure 2 As shown, the track 1 extends circumferentially along the inlet channel 17, with a length approximately 1 / 6 to 1 / 4 of the total length of the inlet channel (adjustable according to actual conditions). The walking sludge-driving device 4 is slidably mounted on the track 1, and can drive the sludge in the inlet channel 17 of the secondary sedimentation tank into the sludge discharge tank 13, that is, the walking sludge-driving device 4 can clean the inlet channel 17 of the secondary sedimentation tank. A sliding contact line 3 is installed on the side of the track 1, which provides power to the walking sludge-driving device 4.

[0028] The sludge discharge tank 13 is equipped with a sludge discharge pump 15, a liquid level control switch 14, and a sludge discharge pipe 16; the liquid level control switch 14 is used to control the opening and closing of the sludge discharge pump 15, and the sludge discharge pump 15 can transport the broken floating sludge to the external sludge storage tank through the sludge discharge pipe 16.

[0029] The spray pump 10 is placed in the drainage channel 18 of the secondary sedimentation tank, and the outlet of the pump is connected to the spray pipe 8. A spray pipe support 9 is installed at the end of the track 1 (near the sludge discharge tank 13), and the spray pipe 8 is installed on the spray pipe support 9, and a spray head 7 is installed on the spray pipe 8; in a preferred embodiment, there are two spray heads 7, one is installed above the adjustable gate 11 chute structure, spraying obliquely towards the sludge discharge tank 13 to wash away the floating mud on the scoop net 410, and the other is installed directly above the sludge discharge tank 13, spraying downwards to disperse the floating mud so that it can be drawn out by the sludge discharge pump 15.

[0030] The most important component in this invention is the walking mud-driving device 4, which includes a walking mud-driving device control box 401, a current collector 402, a motor 403, a walking trolley 404, a main support 405, a net support 409, a net 410, a guide plate 411, a square guide rod 412, an electric push rod 413, a stop 414, a proximity switch 415, a connecting beam 416, and an adjusting pad assembly 417. The control box 401 of the walking mud-driving device is equipped with a frequency converter or PLC to control the motor 403 and the electric push rod 413, thereby controlling the forward and backward movement, travel distance, and lifting and lowering of the net 410 of the walking mud-driving device 4. The current collector 402 is in contact with the sliding contact line 3. The walking trolley 404 is driven by the motor 403, and the wheels of the walking trolley 404 are mounted on the I-beam steel rail 1. The connecting beam 416 is installed below the walking trolley 404, and the adjusting pad group 417 and the main support are installed in sequence below the connecting beam 416, and the three are connected and fixed with bolts. The adjusting pad group 417 includes multiple pads stacked from top to bottom. The height of the main support can be adjusted by increasing or decreasing the number of pads in the adjusting pad group to ensure that the net is in a suitable position when the water level changes. When the net is lowered, the lower edge of the net is submerged in the water by 10-15 cm.

[0031] A width-adaptive structure is installed on the main support 405. This structure includes two guide wheel supports 406 on the left and right sides, and a torsion spring 407 between the guide wheel supports 406. Each guide wheel support 406 can rotate on the main support 405, and each guide wheel support 406 is also equipped with a guide wheel 408. A square guide rod 412 is installed on each of the left and right guide wheel supports 406. The square guide rod 412 serves as a mounting bracket for the electric push rods and extends upwards. There are two electric push rods 413. The tails of the two electric push rods 413 are respectively connected to the tops of the two square guide rods 412, and the telescopic ends of the two electric push rods 413 are respectively connected to two net-catching supports 409. A net 410 is installed on the two net-catching supports 409. In a preferred embodiment, such as... Figure 4 , Figure 5 As shown, there are two width-adaptive structures arranged vertically, with square guide rods 412 mounted only on the two upper guide wheel supports 406. Under the action of the torsion spring 407, the guide wheel supports 406 on both sides always expand outwards, allowing the guide wheels 408 to roll close to the side walls of the inlet channel. This enables the opening and closing degree of the net 410, indirectly mounted on the guide wheel supports 406, to adapt to the changing width of the inlet channel. In other words, this invention uses a torsion spring to control the outward expansion of the left and right guide wheel supports, allowing the guide wheels to roll close to the side walls of the inlet channel, thus adapting the opening and closing degree of the net to changes in the width of the inlet channel.

[0032] The scooping net 410 uses a nylon net with a suitable mesh size, which can both scoop up floating mud and allow the raw water to pass through. It is installed on the scooping net support 409. The extension and retraction of the electric push rod 413 drives the scooping net support 409 to lower and raise the scooping net 410. Guide plates 411 are installed on both the left and right guide wheel supports 406. The guide plates 411 extend obliquely towards the side wall of the inlet channel, bridging the gap between the guide wheel support 406 and the scooping net 410, and guiding the floating mud near the side wall of the inlet channel into the scooping net 410. Figure 4 , Figure 5 As shown, in an embodiment where there are two width-adaptive structures, in the left-right direction, the two guide wheel brackets 406 on the same side share a single guide plate 411.

[0033] When the walking mud-driving device 4 moves forward and approaches the mud discharge tank 13, the scoop net 410 falls down and pushes the floating mud on the water surface into the chute structure 1101, thus entering the mud discharge tank 13; when the walking mud-driving device moves backward and away from the mud discharge tank 13, the scoop net 410 is lifted to avoid the sludge behind.

[0034] The present invention employs a walking mud-driving device linked to a spraying device via a limit switch. Specifically, the start and stop of the spraying water pump 10 are controlled by the stop 414 of the walking mud-driving device 4 touching the limit switch 6. In a preferred embodiment, the control circuit components of the spraying water pump 10, the limit switch 6, the mud-discharging pump 15, and the liquid level control switch 14 are all installed inside the control box 12.

[0035] This invention also provides a method for cleaning floating sludge in the inlet channel, using the aforementioned cleaning device for floating sludge in the secondary sedimentation tank inlet channel. Because the floating sludge is fine and easily disperses when piled up, and the net has a limited capacity, the walking sludge-driving device 4 cannot remove too much floating sludge at once. Therefore, the area of ​​the inlet channel requiring sludge removal, which is also the area covered by track 1, can be divided into three equal sections (or four, five, etc., depending on the amount of floating sludge) or more. These sections are then cleaned sequentially from near to far from the sludge discharge tank 13.

[0036] The following describes the method for cleaning floating sludge in the intake channel, using a three-section cleaning area as an example: When the device is not running, the traveling sludge-driving device 4 is stopped at the starting point of the first cleaning section, and the scoop net 410 is not lowered. When the device starts running, the motor 403 drives the traveling trolley 404 forward, and at the same time, the electric push rod 413 extends, the scoop net 410 falls, and the floating sludge is driven towards the sludge discharge tank 13 via the chute structure 1101. As the traveling sludge-driving device 4 approaches the sludge discharge tank 13, the stop iron 414 on it touches the limit switch 6. The limit switch 6 starts the spray water pump 10, and the spray head 7 starts spraying, breaking up the floating sludge in the sludge discharge tank 13. If the floating sludge is not broken up and discharged with water, it will be difficult for the sludge discharge pump to extract it. When the scoop net 410 of the traveling sludge-driving device 4 reaches above the chute structure 1101 of the adjustable gate 11, if... Figure 7As shown, the highest point of the chute structure forms a ramp at the bottom of the scoop net 410 to ensure that the sludge in the scoop net 410 can flow out smoothly. At this time, the proximity switch 415 is triggered near the stop block 5, the motor 403 reverses, the walking sludge-driving device 4 moves backward, and the electric push rod 413 retracts, causing the scoop net 410 to rise. During this time, the floating sludge on the scoop net 410 is also sprayed by the spray head 7 and flushed into the sludge discharge tank 13. During the backward movement of the walking sludge-driving device 4, the stop block 414 touches the limit switch 6, and the limit switch 6 shuts off the spray water pump 10. The backward movement time of the walking sludge-driving device 4 is set in the walking sludge-driving device control box 401, and its stopping position is the starting point of the second cleaning area. After reaching this point, the motor 403 rotates forward to drive the walking trolley 404 forward, and at the same time, the electric push rod 413 extends, the scoop net 410 falls, and the floating sludge is driven into the sludge discharge tank 13 through the chute structure. Repeat the previous process until the third cleaning area is completely cleared of sludge. The walking sludge-removing device 4 then reverses and stops at the starting point of the first cleaning area, without dropping the scoop net 410. The entire process is complete. The time interval for the next round of work can be set in the control box of the walking sludge-removing device. This time interval can be set based on the time it takes for the floating sludge to nearly cover the cleaning area. Actual conditions are influenced by many factors, such as season, temperature, and sludge condition. After the time interval set in the control box 401 has elapsed, the walking sludge-removing device 4 will begin the next round of work. During this process, when the liquid level in the sludge discharge tank 13 rises to the set position, the liquid level control switch 14 controls the sludge discharge pump 15 to start working, discharging the floating sludge from the sludge discharge tank 13 through the sludge discharge pipe 16 to the sludge storage tank. When the liquid level drops to the set position, the sludge discharge pump 15 stops working.

[0037] The travel distance of the walking mud-driving device 4 from the starting point of the third cleaning area to the chute structure 1101 is three times that of the walking mud-driving device 4 from the starting point of the first cleaning area to the chute structure 1101. The travel distance of the walking mud-driving device 4 from the starting point of the second cleaning area to the chute structure 1101 is twice that of the walking mud-driving device 4 from the starting point of the first cleaning area to the chute structure 1101.

[0038] This invention provides a wastewater treatment plant with an automated, safe, reliable, and convenient device for cleaning floating sludge from the inlet channel of a secondary sedimentation tank. This device requires no human supervision, operates automatically at set times, and thoroughly cleans the sludge, completely removing it from the biochemical system and minimizing its impact. Specifically, this invention uses an adjustable gate to set up a sludge discharge tank at the end of the secondary sedimentation tank inlet channel, lays a track, and installs a walking sludge-driving device. Under the control of a frequency converter or PLC, the walking sludge-driving device cleans the sludge-covered area section by section, driving the sludge to the discharge tank. During the movement of the walking sludge-driving device, a spray pump is activated to spray and disperse the sludge in the discharge tank. The walking sludge-driving device can be set to start at regular intervals to keep the sludge within the cleaning area. When the liquid level in the discharge tank rises to a set position, a level control switch activates the discharge pump, discharging the sludge from the discharge tank to a sludge storage tank, thus completely removing the sludge from the wastewater treatment system. This device requires no human intervention or supervision, operates automatically at set times, cleans thoroughly, is sturdy and durable, and is safe and reliable.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for cleaning floating sludge from the inlet channel of a secondary sedimentation tank, characterized in that, It includes a track (1), a walking mud-driving device (4), an adjustable gate (11), and a mud discharge pool (13). An adjustable gate (11) separates a sludge discharge pool (13) at the end of the inlet channel (17) of the secondary sedimentation tank. The adjustable gate (11) includes a fixed gate (1102) and a chute structure (1101), wherein the height of the chute structure (1101) is adjustable and installed on the fixed gate (1102); A track (1) is installed above the inlet channel (17) of the secondary sedimentation tank; the track (1) extends circumferentially along the inlet channel (17); The walking sludge-driving device (4) is slidably installed on the track (1), and the walking sludge-driving device (4) can drive the sludge in the inlet channel (17) of the secondary sedimentation tank to the sludge discharge tank (13); it also includes a baffle (5); the baffle (5) is installed on the track (1); The walking mud-driving device (4) includes a walking mud-driving device control box (401), a current collector (402), a motor (403), a walking trolley (404), a main support (405), a net support (409), a net (410), a square guide rod (412), an electric push rod (413), a stop (414), a proximity switch (415), a connecting beam (416), and an adjusting pad assembly (417). The wheels of the traveling trolley (404) are hung on the track (1) and can move along the track (1) under the drive of the motor (403). The connecting beam (416) is installed below the traveling trolley (404). The adjusting pad group (417) and the main bracket (405) are installed in sequence below the connecting beam (416). The three are connected and fixed with bolts. A width adaptive structure is installed on the main support (405), the width adaptive structure includes two guide wheel supports (406) on the left and right and a torsion spring (407) installed between the two guide wheel supports (406); each guide wheel support (406) can rotate on the main support (405), and each guide wheel support (406) is also equipped with a guide wheel (408), the guide wheel (408) is in contact with the two side walls of the water inlet channel (17); A square guide rod (412) is mounted on each of the guide wheel brackets (406) on the left and right sides, and the square guide rod (412) extends upward; There are two electric push rods (413); the tails of the two electric push rods (413) are respectively connected to the top of two square guide rods (412), and the telescopic ends of the two electric push rods (413) are respectively connected to two net-catching brackets (409); a net (410) is installed on the two net-catching brackets (409); The control box (401) of the walking mud-driving device is used to control the motor (403) and the electric push rod (413), thereby controlling the forward and backward movement, travel distance, and lifting and lowering of the walking mud-driving device (4); The stop (5) can trigger the proximity switch (415); the stop (414) is mounted on the traveling trolley (404); The walking mud-driving device (4) also includes a guide plate (411); Guide plates (411) are installed on the guide wheel brackets (406) on both the left and right sides; the guide plates (411) extend obliquely toward the side wall of the inlet channel (17).

2. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that, The scooping net (410) includes a nylon net with mesh.

3. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that, It also includes a limit switch (6), a spray pump (10), a spray head (7), a spray pipe (8), and a spray pipe bracket (9). The spray pump (10) is placed in the drainage ditch (18) of the secondary sedimentation tank, and the outlet of the pump is connected to the spray pipe (8); the limit switch (6) is installed on the track (1), and the opening and closing of the spray pump (10) is controlled by the stop iron (414) touching the limit switch (6); A spray pipe bracket (9) is installed at the end of the track (1). The spray pipe (8) is installed on the spray pipe bracket (9), and a spray head (7) is installed on the spray pipe (8). There are two spray heads (7), one sprays at an angle to the sludge discharge tank (13), and the other is installed directly above the sludge discharge tank (13) and sprays downwards to disperse floating sludge.

4. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that, It also includes a level control switch (14), a sludge pump (15), and a sludge pipe (16). The sludge discharge tank (13) is equipped with a sludge discharge pump (15), a liquid level control switch (14), and a sludge discharge pipe (16); the liquid level control switch (14) is electrically connected to control the sludge discharge pump (15), and the sludge discharge pump (15) is connected to the external sludge storage tank through the sludge discharge pipe (16).

5. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 3, characterized in that, It also includes a sliding contact line (3), which is installed on the side of the track (1) and is used to provide power to the walking mud-driving device (4); The current collector (402) is in contact with the sliding contact line (3).

6. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that, The track (1) is an I-beam, and the length of the track (1) is 1 / 6 to 1 / 4 of the length of the entire inlet channel.

7. The device for cleaning floating sludge from the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that, The chute structure (1101) is installed on the fixed gate (1102) through a waist-shaped hole and bolts.

8. A method for cleaning floating sludge from an inlet channel, characterized in that, The cleaning device for the floating sludge in the secondary sedimentation tank inlet channel according to any one of claims 1-7 further includes dividing the inlet channel area where sludge needs to be removed into multiple sections and cleaning them section by section in order from near to far from the sludge discharge tank (13).

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