A full-process intelligent deslagging system and method suitable for a secondary sedimentation tank inlet channel

Abstract

The application discloses a kind of full-process intelligent deslagging systems and methods suitable for the water channel of secondary sedimentation tank, and relates to the field of sewage treatment equipment, comprising: a deslagging car is arranged in the water channel of secondary sedimentation tank, the deslagging car moves along the length of water channel, one end of water channel is provided with openable and closable gate;Squeezer is arranged outside the water channel, the feed inlet of squeezer is connected with the opening of gate;Lifting mechanism is arranged outside the water channel, the residue box of lifting mechanism is connected with the discharge port of squeezer;Control unit is connected with deslagging car, gate, squeezer and lifting mechanism control;The system can realize the automatic and efficient removal of floating sludge in the water channel, reduce the amount of floating sludge into the main body of secondary sedimentation tank from the source, and improve the stability and economy of sewage treatment process.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment equipment, and more specifically, relates to a fully intelligent sludge removal system and method suitable for the inlet channel of a secondary sedimentation tank. Background Technology

[0002] In the wastewater treatment process, the floating debris forming on the surface of the secondary sedimentation tank mainly consists of lightweight impurities such as grease, foam, sludge fragments, and fibers. If not treated promptly, this scum can negatively impact the operating efficiency of the wastewater treatment plant, effluent quality, and equipment lifespan. When suspended solids exceed standards, they are discharged with the effluent, causing SS (suspended solids) and BOD / COD (biochemical oxygen demand / chemical oxygen demand) levels to exceed limits, thus affecting effluent quality. Scum may adsorb heavy metals, organic pollutants, or pathogenic microorganisms, increasing the load on subsequent disinfection or advanced treatment. Furthermore, it may cause sludge in the secondary sedimentation tank to float, interfering with sludge settling and reducing sludge return efficiency. Therefore, effectively and promptly removing scum from the secondary sedimentation tank inlet channel is a crucial step in ensuring the stable operation of the wastewater treatment system and achieving effluent quality standards. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a fully intelligent slag removal system and method suitable for the inlet channel of a secondary sedimentation tank. This system can automatically and efficiently remove slag in the inlet channel, reducing the amount of slag entering the main body of the secondary sedimentation tank from the source, and improving the stability and economy of the wastewater treatment process.

[0004] To achieve the above objectives, the present invention provides a fully intelligent slag removal system suitable for the inlet channel of a secondary sedimentation tank, comprising: A slag scraper is installed in the inlet channel of the secondary sedimentation tank. The slag scraper moves along the length of the inlet channel, and one end of the inlet channel is equipped with an openable and closable gate. A press is installed outside the water inlet channel, and the feed inlet of the press is connected to the opening of the gate. A lifting mechanism is installed outside the water inlet channel, and the slag box of the lifting mechanism is connected to the discharge port of the press. The control unit is connected to the scraper truck, the gate, the press, and the lifting mechanism.

[0005] Preferably, two sets of track supports are provided on both sides of the water inlet channel, and each set of track supports is provided with a track, and the two ends of the slag scraper are slidably mounted on the track.

[0006] Preferably, a steel wire rope is installed above the water inlet channel, the steel wire rope is connected to a rotating motor, the control unit controls the forward and reverse rotation and the running speed of the rotating motor, and the steel wire rope is connected to the slag scraper truck through a traction hook.

[0007] Preferably, the slag scraper includes a scraper and a tilting motor. The tilting motor is connected to the control unit. The output end of the tilting motor is connected to the top of the scraper. When the slag scraper moves toward the gate, the tilting motor drives the scraper to contact the water surface of the inlet channel. When the slag scraper moves away from the gate, the tilting motor drives the scraper to separate from the water surface of the inlet channel.

[0008] Preferably, the gap between the two ends of the scraper and the inner wall of the water inlet channel does not exceed 5mm.

[0009] Preferably, a limit switch is provided on one side of the water inlet channel, and the limit switch is connected to the control unit.

[0010] Preferably, the feed inlet of the press is connected to the opening of the gate through a dedicated slag guide pipe, and the press is a screw press.

[0011] Preferably, when the slag box of the lifting mechanism is at the bottom, the discharge port of the press faces the slag box of the lifting mechanism.

[0012] Preferably, the liquid outlet of the press is connected to a sewage pit, and a sewage pump is installed in the sewage pit.

[0013] This invention also provides a fully intelligent slag removal method suitable for the inlet channel of a secondary sedimentation tank. Utilizing the aforementioned fully intelligent slag removal system suitable for the inlet channel of a secondary sedimentation tank, the slag removal method includes: The press starts operating by sending a start command to the press through the control unit. The control unit sends a start command to the gate, and the gate opening switches to the open state; The control unit sends a start command to the slag scraper truck, and the slag scraper truck moves from the starting position toward the gate in the water intake channel. The scraper in the slag scraper truck comes into contact with the water surface of the water intake channel. When the slag scraper reaches the end position, the control unit sends a reverse start command to the slag scraper. The slag scraper moves away from the gate in the water intake channel, and the scraper in the slag scraper does not come into contact with the water surface of the water intake channel. After the slag scraper stops moving on the inlet channel, the control unit sends shutdown commands to the gate and the press in sequence. When the dry residue discharged from the press accumulates to a set value in the residue box of the lifting mechanism, the control unit sends a lifting command to the lifting mechanism.

[0014] This invention provides a fully intelligent slag removal system and method suitable for the inlet channel of a secondary sedimentation tank, the advantages of which are: 1. This slag removal system controls the slag scraper, gate, press, and lifting mechanism through a control unit. When the slag scraper moves towards the gate, the control unit will bring the scraper in the slag scraper into contact with the water surface. In this way, the scraper can collect light debris such as grease, foam, sludge fragments, and fibers floating on the water surface. When the debris is collected by the scraper and approaches the gate, the control unit will open the gate, so that the debris enters the press. Under the control of the control unit, the press separates the scum from the sewage. The dry scum discharged from the press is discharged into the scum box of the lifting mechanism. When the dry scum in the scum box accumulates to a certain volume, the control unit will raise the scum box from the lower level to the ground, which facilitates subsequent manual or mechanical transportation and disposal. This slag removal system, controlled by the control unit, can automatically clean the scum in the secondary sedimentation tank inlet channel, reducing the amount of scum entering the main body of the secondary sedimentation tank from the source and ensuring the stable and efficient operation of the sewage treatment process. 2. This slag removal method uses a control unit to adjust the position of the scraper truck reciprocating in the inlet channel. When the scraper truck moves closer to the gate, the scraper blades contact the water surface of the inlet channel, thus collecting the floating debris to the gate opening. When the scraper truck moves away from the gate, the scraper blades detach from the water surface of the inlet channel, avoiding disturbance to the water flow and thus affecting the settling of the scum. The control unit controls the opening and closing of the gate; the gate is only opened when the scraper blades approach the gate opening, allowing the collected debris to enter the press. The press then mixes the scum with the debris for pressing and dewatering, achieving efficient separation of scum and wastewater. The control unit ensures the smooth operation of the slag removal process by controlling and coordinating the various components, and the close coordination between each component improves the operating efficiency of the slag removal system.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0017] Figure 1 A schematic diagram of a fully intelligent slag removal system for a secondary sedimentation tank inlet channel, according to an embodiment of the present invention, is shown.

[0018] Figure 2A schematic diagram of a fully intelligent slag removal system for a secondary sedimentation tank inlet channel, according to an embodiment of the present invention, is shown located outside the inlet channel.

[0019] Figure 3 A structural diagram is shown of a slag scraper truck moving toward the gate according to an embodiment of the present invention.

[0020] Figure 4 A structural diagram is shown of a slag scraper truck moving away from the gate according to an embodiment of the present invention.

[0021] Figure 5 A schematic diagram of the structure surrounding a press according to an embodiment of the present invention is shown.

[0022] Figure 6 A schematic diagram of a lifting mechanism located above the ground surface according to an embodiment of the present invention is shown.

[0023] Figure 7 A flowchart of a fully intelligent slag removal method for the inlet channel of a secondary sedimentation tank, according to the present invention, is shown.

[0024] Explanation of reference numerals in the attached figures: 1. Water inlet channel; 2. Slag scraper; 3. Limit switch; 4. Gate; 5. Press; 6. Slag box; 7. Sewage pump; 8. Control unit; 9. Tilting motor; 10. Scraper. Detailed Implementation

[0025] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0026] like Figure 1 and Figure 2 As shown, this invention provides a fully intelligent slag removal system suitable for the inlet channel 1 of a secondary sedimentation tank, comprising: Sludge scraper 2 is installed in each water inlet channel 1. The sludge scraper 2 moves along the length of the water inlet channel 1. Each water inlet channel 1 is equipped with an openable and closable gate 4 at one end. The press 5 is located outside the water inlet channel 1, and the feed inlet of the press 5 is simultaneously connected to the openings of the gates 4 of the two water inlet channels 1. The lifting mechanism is located outside the water inlet channel 1, and the slag box 6 of the lifting mechanism is connected to the discharge port of the press 5. Control unit 8 is connected to the scraper truck 2, gate 4, press 5 and lifting mechanism.

[0027] Specifically, the slag removal system is installed on the inlet channel 1 of the secondary sedimentation tank. Slag scrapers 2 and gates 4 are respectively installed in each inlet channel 1. The press 5, lifting mechanism, and control unit 8 are located outside the two inlet channels 1. The control unit 8 controls the two slag scrapers 2. In each inlet channel, the slag scrapers 2 collect the floating slag on the water surface. When the slag scrapers 2 move towards one end of the inlet channel 1, the control unit 8 opens the gates 4, allowing the collected slag, along with wastewater, to enter the press 5 through the openings. The gate openings of the two inlet channels are connected to the press 5 via Y-shaped pipes. The operating press 5 can press and dewater the mixed slag. The dry slag discharged from the press 5 is discharged into the slag box 6 of the lifting mechanism. The liquid discharged from the press 5 flows into the wastewater pit through a filter. Periodically, the wastewater can be sent to the downstream wastewater treatment process via a sewage pump 7, thus reducing the load on subsequent deep treatment processes. Under the control of the control unit 8, the slag removal system uses a slag scraper to move back and forth on the water surface of the inlet channel 1, continuously pushing the floating slag on the water surface towards one end of the gate 4. After the floating slag is collected, it is discharged into the press 5 without affecting the normal flow of water in the inlet channel 1. The press 5 operates independently of the inlet channel 1, and the operation of the press 5 does not affect the operation of the inlet channel 1. The dry slag produced by the press 5 can be transferred to the ground above ground by a lifting mechanism and transported out by manual or mechanical means to achieve centralized recovery of floating slag. The wastewater produced by the press 5 is filtered and enters the wastewater pit for further treatment.

[0028] The lifting mechanism in this slag removal system can be automatically controlled by a control unit and a level sensor, or it can be manually controlled. Workers can control the lifting mechanism according to the amount of dry slag in the slag box and the arrival time of the slag truck on the ground, making the slag box lifting frequency more free and flexible.

[0029] like Figure 1 As shown, two sets of track supports are set on both sides of the water inlet channel 1, and each set of track supports is equipped with a track. The two ends of the slag scraper 2 are slidably set on the track.

[0030] Preferably, a steel wire rope is installed above the water inlet channel 1. The steel wire rope is connected to a rotating motor. The control unit 8 controls the forward and reverse rotation and the running speed of the rotating motor. The steel wire rope is connected to the slag scraper 2 through a traction hook.

[0031] Specifically, the slag removal system has rail supports on both sides along the length of each inlet channel 1, with rails installed on each side. The scraper 2 slides along these rails at both ends. The scraper 2 is pulled by a steel cable, which is centrally positioned above the inlet channel 1. The scraper 2 moves along the length of the inlet channel 1, and the rails ensure its trajectory remains aligned with the axis of the inlet channel 1, preventing blind spots during operation. A geared motor is also installed on the bank of the inlet channel 1, serving as the power output element. The control unit 8 controls the motor's forward and reverse rotation via a preset program, enabling the scraper 2 to move at a constant speed along the entire length of the inlet channel 1. The operating speed of the scraper 2 can be flexibly adjusted according to the width of the inlet channel 1 and the amount of scum produced, with a typical adjustment range of 0.5~1.2 m / min. This ensures sufficient contact between the scraper blade 10 and the water surface while minimizing water flow disturbance that could affect scum settling.

[0032] like Figure 3 and Figure 4 As shown, the slag scraper 2 includes a scraper 10 and a tilting motor 9. The tilting motor 9 is connected to the control unit 8. The output end of the tilting motor 9 is connected to the top of the scraper 10. When the slag scraper 2 moves toward the gate 4, the tilting motor 9 drives the scraper 10 to contact the water surface of the inlet channel 1. When the slag scraper 2 moves away from the gate 4, the tilting motor 9 drives the scraper 10 to separate from the water surface of the inlet channel 1.

[0033] Preferably, the gap between the two ends of the scraper and the inner wall of the water inlet channel 1 does not exceed 5mm.

[0034] Specifically, the scum scraper 2 includes a tilting motor 9 and a wear-resistant and corrosion-resistant scraper 10 mounted at the bottom. The tilting motor 9 is also controlled by the control unit 8. In the forward direction, the scraper 10 is lowered by the tilting motor 9 to scrape off scum; in the return direction, the scraper 10 is tilted by the tilting motor 9 and does not perform scum discharge. The scraper 10 adopts a vertical contact design with the water inlet channel 1, with a gap of no more than 5mm between it and the inner wall of the channel. This effectively scrapes and collects light debris such as grease, foam, sludge fragments, and fibers floating on the water surface, preventing scum from adhering to the inner wall of the channel or escaping through the gaps in the scraper 10. During the movement of the scraper 10, the scum on the pool surface is continuously scraped and collected towards the pre-set scum discharge side of the channel, forming a concentrated scum pile, laying the foundation for the subsequent scum discharge process.

[0035] Preferably, a limit switch 3 is provided on one side of the water inlet channel 1, and the limit switch 3 is connected to the control unit 8.

[0036] Specifically, a limit switch 3 is installed at one end of the inlet channel 1. This switch serves as a signal detection element for the operating position of the sludge scraper 2. When the sludge scraper 2 reaches the preset position on the sludge discharge side, it triggers the limit switch 3. The limit switch 3 immediately sends a position signal to the control unit 8. The control unit 8, through preset logic instructions, quickly controls the gate 4 (made of stainless steel, suitable for corrosive sewage environments, with an opening and closing time ≤10s) to open automatically. At the same time, it adjusts the operating speed of the sludge scraper 2 to a low speed (0.3-0.5m / min) to ensure that the concentrated scum pile is smoothly discharged from the inlet channel 1 with the water flow, avoiding scum splashing or residue.

[0037] like Figure 5 and Figure 6 As shown, the feed inlet of the press 5 is connected to the opening of the gate 4 through a special slag guide pipe. The press 5 is a screw press.

[0038] Preferably, when the slag box 6 of the lifting mechanism is at the bottom, the discharge port of the press 5 faces the slag box 6 of the lifting mechanism.

[0039] Preferably, the outlet of the press 5 is connected to a sewage pit, and a sewage pump 7 is installed in the sewage pit.

[0040] Specifically, the mixed scum (containing scum and a small amount of wastewater) collected through the gates 4 of the two inlet channels 1 is precisely transported from a dedicated scum guide pipe to the feed inlet of a screw press. The screw press, through the uniform rotation of the screw shaft at a speed of 8.5 r / min, presses and dewaters the mixed scum, achieving efficient solid-liquid separation of scum and wastewater. During the pressing process, the scraper carts 2 of the two inlet channels 1 move in opposite directions to ensure the normal operation of the press. The water in the scum is squeezed out, forming dry scum with a moisture content ≤75%. The dry scum falls into the scum box 6 through the discharge port of the press 5. When the amount of dry scum in the scum box 6 reaches a certain value, the level sensor confirms the amount of dry scum, and the lifting mechanism lifts the scum box 6 to a designated position on the ground for subsequent manual or mechanical transportation and disposal, achieving centralized recycling of the scum. The filtrate produced by the screw press (containing a small amount of fine suspended matter) flows into the sewage pit after being filtered through the filter holes at the bottom of the press 5. Once the liquid level reaches the control level of the sewage pump 7, it is confirmed by the liquid level sensor and then transported by the sewage pump 7 to the downstream process of sewage treatment, which can reduce the load of subsequent deep treatment.

[0041] This invention also provides a fully intelligent slag removal method suitable for the inlet channel 1 of a secondary sedimentation tank. Utilizing the aforementioned fully intelligent slag removal system suitable for the inlet channel 1 of a secondary sedimentation tank, the slag removal method includes: The press 5 starts operating after the control unit 8 sends a start command to the press 5. The control unit 8 sends a start command to the gate 4, and the opening of the gate 4 is switched to the open state; The control unit 8 sends a start command to the slag scraper 2, and the slag scraper 2 moves from the starting position toward the gate in the water intake channel 1. The scraper 10 in the slag scraper 2 comes into contact with the water surface of the water intake channel 1. When the slag scraper 2 reaches the end position, the control unit 8 sends a reverse start command to the slag scraper 2. The slag scraper 2 moves away from the gate 4 in the water intake channel 1. The scraper 10 in the slag scraper 2 does not come into contact with the water surface of the water intake channel 1. After the slag scraper 2 stops moving on the water inlet channel 1, the control unit 8 sends a stop command to the gate 4 and the press 5 in sequence. When the dry residue discharged from the press 5 accumulates to a set value in the residue box 6 of the lifting mechanism, the control unit 8 issues a lifting command to the lifting mechanism.

[0042] Specifically, the entire slag removal system is logically controlled by control unit 8. Control unit 8 employs a PLC intelligent control system with a built-in preset control program. It can receive signals from various detection elements such as limit switches 3, level sensors, sensors, and electromagnetic induction switches in real time, enabling coordinated control of the operation of the slag scraper 2, the opening and closing of the electric gate 4, the operation of the screw press, the lifting of the slag box 6, and the start and stop of the sewage pump 7. This slag removal system can automatically adjust the operating parameters of each device based on the amount of slag generated in the influent channel and water quality parameters. It also features fault alarms, such as those for equipment jamming, abnormal liquid levels, and power failures. Furthermore, it provides real-time feedback on operating status and parameter recording and query functions, requiring no manual intervention throughout the entire process. This truly achieves automated, intelligent, and refined operation of the slag removal process, reducing slag entering the secondary sedimentation tank at the source and ensuring the stable and efficient operation of the wastewater treatment process.

[0043] The slag removal system has a start position and an end position set on the water inlet channel. The start position is the position where the slag scraper is furthest from the gate on the water inlet channel, and the end position is the position set by the limit switch on the water inlet channel. Driven by the rotating motor, the slag scraper moves back and forth between the start position and the end position.

[0044] like Figure 7 As shown in the figure, this diagram illustrates a fully intelligent slag removal system suitable for the inlet channel of a secondary sedimentation tank. The control unit sends control commands to various specific locations and components within the slag removal system. Figure 7 The flowchart is arranged from top to bottom according to the positional changes of the scum in the slag removal system. It starts from the scum coming into contact with the slag scraper, to the scum being collected at the end with the gate, to the scum mixture entering the press, and finally the scum mixture being processed to form dry matter and water.

[0045] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A fully intelligent slag removal system suitable for the inlet channel of a secondary sedimentation tank, characterized in that, include: A slag scraper is installed in the inlet channel of the secondary sedimentation tank. The slag scraper moves along the length of the inlet channel, and one end of the inlet channel is equipped with an openable and closable gate. A press is installed outside the water inlet channel, and the feed inlet of the press is connected to the opening of the gate. A lifting mechanism is installed outside the water inlet channel, and the slag box of the lifting mechanism is connected to the discharge port of the press. The control unit is connected to the scraper truck, the gate, the press, and the lifting mechanism.

2. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, Two sets of track supports are respectively installed on both sides of the water inlet channel, and each set of track supports is equipped with a track. The two ends of the slag scraper are respectively slidably installed on the track.

3. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, A steel wire rope is installed above the water inlet channel. The steel wire rope is connected to a rotating motor. The control unit controls the forward and reverse rotation and the operating speed of the rotating motor. The steel wire rope is connected to the slag scraper truck through a traction hook.

4. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, The slag scraper includes a scraper and a tilting motor. The tilting motor is connected to the control unit. The output end of the tilting motor is connected to the top of the scraper. When the slag scraper moves toward the gate, the tilting motor drives the scraper to contact the water surface of the inlet channel. When the slag scraper moves away from the gate, the tilting motor drives the scraper to separate from the water surface of the inlet channel.

5. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 4, characterized in that, The gap between the two ends of the scraper and the inner wall of the water inlet channel shall not exceed 5 mm.

6. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, A limit switch is provided on one side of the water inlet channel, and the limit switch is connected to the control unit.

7. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, The feed inlet of the press is connected to the opening of the gate through a dedicated slag guide pipe, and the press is a screw press.

8. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, When the slag box of the lifting mechanism is at the bottom, the discharge port of the press faces the slag box of the lifting mechanism.

9. The intelligent slag removal system for the entire process of the secondary sedimentation tank inlet channel according to claim 1, characterized in that, The liquid outlet of the press is connected to a sewage pit, and a sewage pump is installed in the sewage pit.

10. A fully intelligent slag removal method for the inlet channel of a secondary sedimentation tank, utilizing the fully intelligent slag removal system for the inlet channel of a secondary sedimentation tank according to any one of claims 1-9, characterized in that, The slag removal method includes: The press starts operating by sending a start command to the press through the control unit. The control unit sends a start command to the gate, and the gate opening switches to the open state; The control unit sends a start command to the slag scraper truck, and the slag scraper truck moves from the starting position toward the gate in the water intake channel. The scraper in the slag scraper truck comes into contact with the water surface of the water intake channel. When the slag scraper reaches the end position, the control unit sends a reverse start command to the slag scraper. The slag scraper moves away from the gate in the water intake channel, and the scraper in the slag scraper does not come into contact with the water surface of the water intake channel. After the slag scraper stops moving on the inlet channel, the control unit sends shutdown commands to the gate and the press in sequence. When the dry residue discharged from the press accumulates to a set value in the residue box of the lifting mechanism, the control unit sends a lifting command to the lifting mechanism.

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