A device for cleaning floating objects from the surface of a contact disinfection tank

Abstract

The utility model relates to a kind of contact disinfection pool water surface floating object cleaning device, including skimming system, lifting system, discharging system and control system, lifting system is fixed in the pool wall top of contact disinfection pool downstream and opposite water flow direction, skimming system is connected with the execution end of lifting system, by lifting system driving skimming system vertical lifting, to make it always with pool water surface keep preset relative position;The skimming end of discharging system is set in skimming system, for the floating object that skimming system collected is discharged outside pool;Lifting system and discharging system are electrically connected with control system, by control system control its operation.The utility model aims at providing a kind of contact disinfection pool water surface floating object cleaning device, by the collaborative work of liftable skimming system, automatic discharging system and intelligent control system, the efficient, stable cleaning of floating object is realized, solve the problem, such as the collection blind area caused by water level fluctuation of traditional device, manual intervention is more.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a device for cleaning floating debris from the surface of a contact disinfection tank in a wastewater treatment plant. Background Technology

[0002] In wastewater treatment processes, disinfection is a crucial step in killing pathogenic microorganisms in water and preventing the spread of disease. The contact disinfection tank is the core structure for achieving this function, where wastewater is thoroughly mixed with disinfectant and retained for a certain period to achieve the desired disinfection effect. During and after disinfection, some light impurities often precipitate out or remain in the wastewater, such as grease, scum, foam, biofilm fragments, and other suspended solids with a density less than water that were not completely removed by the pretreatment units. These substances float on the surface of the contact disinfection tank, forming a visible layer of floating matter. If this floating matter is carried into subsequent processes or directly discharged into natural water bodies, it will not only cause sensory pollution and affect the quality of the effluent, but may also carry pathogens that have not been completely inactivated, posing environmental and health safety hazards.

[0003] Currently, most wastewater treatment plants rely on traditional and reactive methods to handle floating debris on the surface of their disinfection tanks. Common practices include fixed interception and manual removal. Fixed interception involves installing fixed scum baffles or collection troughs near the effluent weir at the end of the tank. While simple in structure, this method is inefficient and cannot adapt to changes in water level. When the water level fluctuates due to influent flow, the fixed baffles either become submerged and ineffective or remain above water, resulting in a large overflow of floating debris. Manual removal relies on operators periodically cleaning the tank using nets and other tools. This method is not only labor-intensive, inefficient, and costly, but also poses safety hazards, and the timeliness and continuity of cleaning operations are difficult to guarantee.

[0004] Therefore, existing technologies lack a dedicated device capable of automatically, efficiently, and continuously adapting to water level changes and collecting and discharging floating debris from the surface of the disinfection tank. This results in inconsistent debris removal efficiency, potential risks to effluent quality, and increased labor costs and operational safety risks. Utility Model Content

[0005] To address the aforementioned problems in existing technologies, this invention provides a floating debris removal device for contact disinfection tanks that can automatically adapt to water level changes and operate efficiently and continuously. The technical problem to be solved by this invention is achieved through the following technical solution:

[0006] A device for cleaning floating debris from a contact disinfection tank includes a skimming system, a lifting system, a sludge discharge system, and a control system. The lifting system is fixed to the top of the tank wall downstream of the contact disinfection tank, opposite to the water flow direction. The skimming system is connected to the actuator of the lifting system and is driven by the lifting system to vertically lift and lower, maintaining a preset relative position with the water surface. The sludge discharge system has a suction end located within the skimming system to discharge the collected floating debris outside the tank. The control system senses the water level in the contact disinfection tank and controls the lifting system's operation. Both the lifting system and the sludge discharge system are electrically connected to the control system, which controls their operation.

[0007] In a specific embodiment of this utility model, the skimming system includes an upward-opening U-shaped slag collection trough and an inclined guide plate. The lower edge of the guide plate extends below the water surface, and the upper edge is connected to the inlet of the U-shaped slag collection trough.

[0008] In a specific embodiment of this utility model, the lifting system includes a bracket and an electric push rod. One end of the bracket is fixed to the top of the pool wall, and the other end extends horizontally toward the center of the pool to form a horizontal arm. The cylinder of the electric push rod is fixedly installed at the front end of the horizontal arm, and the telescopic end of the push rod is downward and connected to the bottom of the U-shaped slag collection trough for lifting the U-shaped slag collection trough.

[0009] In a specific embodiment of this utility model, the slag discharge system includes a sewage pump and a sewage pipe. The outlet end of the sewage pump is connected to the sewage pipe to pump the floating matter collected in the U-shaped slag collection trough to the sewage well outside the pool.

[0010] In a specific embodiment of this utility model, one end of the bottom of the U-shaped slag collection trough is provided with a downward protrusion, which is used to house the sewage pump.

[0011] In a specific embodiment of this utility model, the control system includes a water level sensor and a PLC controller. The water level sensor is used to detect the water level in the pool in real time and transmit the signal to the PLC controller. The PLC controller controls the operation of the lifting system according to a preset program to adjust the height of the skimming system.

[0012] In a specific embodiment of this utility model, the control system further includes a timer module for presetting the start and stop times of the slag discharge system, thereby enabling intermittent operation.

[0013] In a specific embodiment of this utility model, the lifting system consists of two sets.

[0014] In a specific embodiment of this utility model, the U-shaped slag collection trough is made of 304 stainless steel.

[0015] In a specific embodiment of this utility model, the lifting system is one of an electric winch, a hydraulic cylinder, or a pneumatic cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention features a lifting system that allows for easy adjustment of the skimming system's height, effectively addressing water level fluctuations caused by changes in influent flow and avoiding the drawbacks of fixed baffles. The slag discharge system can be set to operate intermittently or continuously, promptly removing collected floating debris to prevent blockages and secondary pollution, thus reducing manual labor intensity. Automatic water level tracking via a water level sensor and PLC controller eliminates the need for manual intervention, ensuring consistent skimming performance. The use of an electric push rod as a power source provides smooth operation and high thrust. The U-shaped slag collection trough, combined with the guide plate, ensures high collection efficiency. The built-in sewage pump design is compact and ensures thorough slag discharge. Attached Figure Description

[0018] Figure 1 The front view of the structure of the contact disinfection pool surface floating object cleaning device provided by this utility model.

[0019] Figure 2 A side view of the structure of the contact disinfection pool surface floating debris cleaning device provided by this utility model.

[0020] Figure 3 A top view of the structure of the contact disinfection pool surface floating debris cleaning device provided by this utility model.

[0021] In the diagram, 1-slag skimming system; 101-U-shaped slag collection trough; 102-guide plate; 103-protrusion; 2-lifting system; 201-support; 202-electric push rod; 3-slag discharge system; 301-sewage pump; 302-sewage pipe; 4-pool wall. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0023] like Figure 1 , Figure 2As shown, a floating debris removal device for a contact disinfection tank includes a skimming system 1, a lifting system 2, a sludge discharge system 3, and a control system. The lifting system 2 is fixed to the top of the tank wall 4 downstream of the contact disinfection tank, opposite to the water flow direction. This design avoids direct impact of the water flow on the lifting system 2 and maximizes coverage of the floating debris accumulation area, improving collection efficiency and stability. The skimming system 1 is connected to the actuator of the lifting system 2, and is driven by the lifting system 2 to move vertically up and down, maintaining a preset relative position with the water surface. In other words, the position adjustment of the skimming system 1 involves vertical movement, always keeping its relative position with the water surface constant, preventing the collection port from detaching from the water surface or becoming too deeply submerged due to water level fluctuations. The sludge discharge system 3 has its suction end located inside the skimming system 1, used to discharge the floating debris collected by the skimming system 1 out of the tank. This allows for direct collection of the floating debris gathered by the skimming system 1, avoiding secondary pollution or the spread of floating debris. The control system senses the water level in the contact disinfection tank and adjusts the extension and retraction of the lifting system 2 according to water level changes, thereby controlling the operation of the lifting system 2. Both the lifting system 2 and the slag discharge system 3 are electrically connected to the control system, which controls their operation to achieve fully automated control of the entire process.

[0024] The following is a detailed description of each part of the floating debris cleaning device for the contact disinfection pool of this utility model.

[0025] like Figure 1 As shown, the slag skimming system 1 of this utility model includes a U-shaped slag collection trough 101 with an upward opening and an inclined guide plate 102. The lower edge of the guide plate 102 extends below the water surface, and the upper edge is connected to the inlet of the U-shaped slag collection trough 101.

[0026] Specifically, the U-shaped slag collection trough 101 is an open trough with its opening facing upwards, forming a U-shape, and with a flat bottom. A guide plate 102 is inclined and installed on the side of the U-shaped slag collection trough 101 facing the water flow direction. The upper edge of the guide plate 102 is fixedly connected to the inlet of the U-shaped slag collection trough 101, and the lower edge extends downwards below the water surface, typically to a depth of 5-15 cm, with an inclination angle of 10°-30°. The guide plate 102 serves as a guiding channel for floating debris, effectively guiding floating debris to the inlet of the U-shaped slag collection trough 101, preventing it from deviating from the collection path due to water flow, improving collection efficiency, and reducing splashing.

[0027] like Figure 2 As shown, the lifting system 2 of this utility model includes a bracket 201 and an electric push rod 202. One end of the bracket 201 is fixed to the top of the pool wall 4, and the other end extends horizontally toward the center of the pool to form a horizontal arm. The cylinder of the electric push rod 202 is fixedly installed at the front end of the horizontal arm, and the extension end of its push rod is downward and connected to the bottom of the U-shaped slag collection trough 101 for lifting and lowering the U-shaped slag collection trough 101.

[0028] Specifically, the support 201 is welded from rectangular steel pipes or angle steel, forming an H-shape. It is laid horizontally at the top of the pool wall downstream of the water flow in the disinfection pool, opposite to the direction of the water flow. One end is fixed to the top of the pool wall 4 by bolts or pre-embedded steel plates, while the other end extends horizontally towards the center of the pool, forming a horizontal arm. In other words, the horizontal arm is suspended above the water surface of the disinfection pool, providing a stable installation platform for the electric push rod 202. The end of the horizontal arm supports the installation of the electric push rod 202. The cylinder of the electric push rod 202 is fixed to the front end of the horizontal arm by flanges, bolts, or welding. The telescopic end of the electric push rod 202 points downward, perpendicular to the horizontal arm, and is movably connected to the bottom of the U-shaped slag collection trough 101 by bolts, which facilitates installation and subsequent maintenance, and ensures the verticality of the lifting action. The electric push rod 202 serves as the power execution unit of the lifting system 2, directly driving the U-shaped slag collection trough 101 to lift vertically through telescopic action, thereby achieving adaptive adjustment of the water level.

[0029] like Figure 1 As shown, the slag discharge system 3 of this utility model includes a sewage pump 301 and a sewage pipe 302. The outlet end of the sewage pump 301 is connected to the sewage pipe 302 to pump the floating matter collected in the U-shaped slag collection trough 101 to the sewage well outside the pool.

[0030] In a specific embodiment of this utility model, a downwardly protruding protrusion 103 is provided at one end of the bottom of the U-shaped slag collection trough 101, and the protrusion 103 is used to place the sewage pump 301.

[0031] Specifically, the slag discharge system 3 of this utility model mainly includes a sewage pump 301 and a sewage pipe 302. The sewage pump 301 is preferably a submersible pump. The submersible pump is placed directly in the downward protruding part 103 provided at one end of the bottom of the U-shaped slag collection tank 101. The protruding part 103 forms a water collection pit, which can maximize the extraction of floating objects in the tank, especially solid impurities deposited at the bottom of the tank, reduce residues, shorten the distance between the pump body and the floating objects, reduce the energy consumption required for pumping, and provide stable support for the sewage pump 301 to avoid the pump body from shifting due to the rise and fall of the U-shaped tank or water flow disturbance.

[0032] In a specific embodiment of this utility model, the control system includes a water level sensor and a PLC controller. The water level sensor is used to detect the water level in the pool in real time and transmit the signal to the PLC controller. The PLC controller controls the operation of the lifting system 2 according to a preset program to adjust the height of the skimming system 1.

[0033] Specifically, the water level sensor, as the sensing unit of the control system, is responsible for collecting real-time water level data in the contact disinfection tank and converting it into an electrical signal, which is then transmitted to the PLC controller. The PLC controller, as the decision-making and execution unit of the control system, receives the signal from the water level sensor, analyzes the water level deviation through a preset program, and outputs control commands to the electric push rod 202 of the lifting system 2, driving its extension end to move, thereby driving the U-shaped slag collection trough 101 of the skimming system 1 to adjust its height. The displacement sensor of the electric push rod 202 provides real-time feedback on the current extension amount, and the PLC controller continuously corrects the control quantity through closed-loop control until the deviation between the actual water level and the target water level is less than or equal to a threshold, at which point the lifting action stops. During this process, the water level sensor provides accurate water level data, the PLC controller achieves dynamic adjustment through algorithms, and the lifting system 2 executes the actions; the three work together to ensure that the skimming system 1 always maintains the optimal relative position with the water surface.

[0034] The control system of this utility model also includes a timer module, which is used to preset the start and stop times of the slag discharge system 3, so as to carry out intermittent operation.

[0035] The control system of this invention adds a timer module to the existing water level sensor and PLC controller. This allows for intermittent operation of the slag discharge system 3 by pre-setting the start and stop times according to actual needs. For example, the slag discharge frequency can be increased during water intake periods and decreased during non-water intake periods, thereby improving efficiency, reducing energy consumption, and extending equipment lifespan.

[0036] Specifically, the operating cycle and single-run duration are set through the timer module. After the timer module is started, it begins timing. When the accumulated time reaches the cycle, a slag discharge start signal is generated and transmitted to the PLC controller. The PLC controller outputs a command to the sewage pump 301 to start slag discharge. After receiving the slag discharge start signal, the PLC controller controls the sewage pump 301 to run for the set single time. After completion, it automatically stops. After the slag discharge is completed, the timer module restarts timing and enters the next cycle, repeating the above process. This design fully considers the actual operating needs of the sewage treatment plant, such as the periodicity of floating matter generation and energy consumption control requirements.

[0037] like Figure 3 As shown, in a specific embodiment of this utility model, the lifting system 2 can be set as one set or multiple sets according to actual needs or the specific size of the disinfection pool, preferably two sets.

[0038] Specifically, two sets of lifting systems 2 are symmetrically installed at the top of the downstream wall 4 of the contact disinfection tank, and the actuators of the two electric actuators 202 are respectively connected to the bottom of the U-shaped slag collection trough 101. It should be noted that the models and parameters of the brackets 201, electric actuators 202, and other components of the two sets of lifting systems 2 are completely identical to ensure balanced driving force on both sides. When it is necessary to adjust the height of the U-shaped slag collection trough 101, the two sets of electric actuators 202 extend or retract simultaneously, jointly driving the U-shaped slag collection trough to move smoothly in the vertical direction, avoiding tilting or displacement caused by unilateral force.

[0039] In a specific embodiment of this utility model, the U-shaped slag collection trough 101 is made of metal, preferably 304 stainless steel. This material is resistant to sewage corrosion and oxidation, and is suitable for disinfection tank environments that are constantly damp and contain chemicals, thus extending the service life of the equipment. It is suitable for scenarios such as contact disinfection tanks in sewage treatment plants.

[0040] In a specific embodiment of this utility model, the lifting system 2 can be an electric push rod 202, or an electric winch, hydraulic cylinder, or pneumatic cylinder. Different driving methods can adapt to different scenario requirements, expanding the applicability of the device.

[0041] The working principle of this invention is as follows: It achieves efficient cleaning of floating debris on the water surface through an automated closed-loop system of adaptive water level adjustment, floating debris collection, and timed sludge removal. Specifically, the control system uses a water level sensor to monitor the water level in the disinfection tank in real time, driving the lifting system 2 to adjust the height of the skimming system 1 so that its inlet is always close to the water surface, ensuring that floating debris smoothly enters the skimming system 1. After the floating debris is collected and temporarily stored by the skimming system 1, the control system triggers the sludge removal system 3 according to a preset cycle to discharge the collected floating debris out of the tank. The entire process requires no manual intervention, adapts to water level fluctuations, and ensures cleaning efficiency and the stability of the disinfection tank operation.

[0042] Actual operation tests have shown that this device can reduce the coverage of floating objects on the water surface from 30%-50% of traditional devices to below 5%, increase the utilization rate of disinfectant by 15%, and reduce the frequency of manual retrieval from 3 times a day to once a week, significantly improving the operational efficiency and water quality assurance capabilities of the contact disinfection pool.

[0043] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A device for cleaning floating debris from the surface of a contact disinfection pool, characterized in that: The system includes a skimming system, a lifting system, a sludge discharge system, and a control system. The lifting system is fixed to the top of the pool wall downstream of the contact disinfection pool, opposite to the water flow direction. The skimming system is connected to the actuator of the lifting system, and is driven by the lifting system to vertically raise and lower itself, maintaining a preset relative position with the water surface in the pool. The sludge discharge system's suction end is located inside the skimming system, used to discharge the floating debris collected by the skimming system out of the pool. The control system senses the water level in the contact disinfection pool and controls the lifting system's operation. Both the lifting system and the sludge discharge system are electrically connected to the control system, which controls their operation.

2. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 1, characterized in that, The skimming system includes an upward-opening U-shaped slag collection trough and an inclined guide plate. The lower edge of the guide plate extends below the water surface, and the upper edge connects to the inlet of the U-shaped slag collection trough.

3. The floating debris cleaning device for the contact disinfection pool according to claim 2, characterized in that, The lifting system includes a bracket and an electric push rod. One end of the bracket is fixed to the top of the pool wall, and the other end extends horizontally toward the center of the pool to form a horizontal arm. The cylinder of the electric push rod is fixedly installed at the front end of the horizontal arm, and the extension end of the push rod points downward and is connected to the bottom of the U-shaped slag collection trough for lifting the U-shaped slag collection trough.

4. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 3, characterized in that, The slag removal system includes a sewage pump and a sewage pipe. The outlet end of the sewage pump is connected to the sewage pipe to pump the floating matter collected in the U-shaped slag collection trough to the sewage well outside the pool.

5. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 4, characterized in that, One end of the bottom of the U-shaped slag collection trough is provided with a downward protrusion, which is used to house the sewage pump.

6. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 1, characterized in that, The control system includes a water level sensor and a PLC controller. The water level sensor is used to detect the water level in the pool in real time and transmit the signal to the PLC controller. The PLC controller controls the operation of the lifting system according to a preset program to adjust the height of the skimming system.

7. The floating debris cleaning device for a contact disinfection pool according to claim 6, characterized in that, The control system also includes a timer module for presetting the start and stop times of the slag discharge system, thereby enabling intermittent operation.

8. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 1, characterized in that, The lifting system consists of two sets.

9. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 2, characterized in that, The U-shaped slag collection trough is made of 304 stainless steel.

10. The device for cleaning floating debris from the surface of a contact disinfection pool according to claim 1, characterized in that, The lifting system is one of an electric winch, a hydraulic cylinder, or a pneumatic cylinder.

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