System and method for automatically cleaning float sludge in water inlet channel of secondary sedimentation tank

Abstract

The invention discloses a secondary sedimentation tank water inlet canal float sludge automatic cleaning system and a cleaning method, and belongs to the field of sewage treatment float sludge cleaning. The system comprises a solar module, a main control system, a mud scraping trolley module and a sewage suction pump module. The solar module is powered by solar energy to realize energy conservation and consumption reduction; the main control system starts a cleaning process once every 12 hours through timing control; the mud scraping trolley module can walk along the inner wall of the water inlet canal, and a telescopic mud scraping arm of the mud scraping trolley module adapts to the variable-width ox horn groove to scrape floating mud to the position of a sewage suction pump; the sewage suction pump module is automatically started after the mud scraping trolley arrives and is automatically closed after five minutes, and floating mud is discharged. According to the system, unmanned operation is realized, the labor cost is saved, the safety risk is reduced, and float sludge can be effectively cleaned. According to the cleaning method, the system is utilized, and float sludge cleaning is completed through the steps of solar power supply, timing starting, automatic sludge scraping, sewage suction and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment floating sludge cleaning technical field, especially to a kind of automatic cleaning system and cleaning method of floating sludge in secondary sedimentation tank inlet channel. BACKGROUND

[0002] The secondary sedimentation tank of sewage treatment plant is the sedimentation facility after biochemical treatment of sewage, and it bears the important function of water and sludge separation and removal of suspended solids by sedimentation after biochemical treatment of sewage. The secondary sedimentation tank is mostly circular radial flow sedimentation tank, which can be divided into structures such as week inlet and week outlet, and middle inlet and week outlet according to the inlet and outlet water mode. The sewage is uniformly introduced into the tank through the water inlet channel at the edge of the circular tank body and the water distribution hole distributed at the bottom of the water inlet channel in the secondary sedimentation tank with week inlet and week outlet. The water body after sedimentation overflows to the top outlet chute arranged along the periphery of the circular tank body and enters the subsequent treatment facility.

[0003] In order to avoid water accumulation at the water inlet position and ensure uniform water distribution, the water inlet channel of the secondary sedimentation tank with week inlet and week outlet is often designed with variable-width horn trough. However, the lighter suspended solids in the suspended solids contained in the water inlet cannot enter the secondary sedimentation tank through the bottom water distribution hole due to the buoyancy. With the passage of time, these floating sludge continuously accumulates on the surface of the water inlet channel to form floating sludge. At present, the cleaning of floating sludge can only be carried out frequently by manual operation, which not only consumes a lot of labor cost, but also may cause the floating sludge to be hardened if not cleaned in time, increasing the cleaning difficulty. Therefore, there is a need for an effective automatic cleaning system and method to solve the above problems. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides an automatic cleaning system and method for floating sludge in the water inlet channel of the secondary sedimentation tank, which realizes unmanned operation, improves the efficiency and quality of floating sludge cleaning, and ensures the smoothness of the water inlet channel of the secondary sedimentation tank and the effect of sewage treatment.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: An automatic cleaning system for floating sludge in the water inlet channel of the secondary sedimentation tank, comprising a solar module, a main control system, a mud scraping trolley module and a sewage suction pump module. The solar module provides power supply for the automatic cleaning system. The main control system comprises a crystal oscillator module, a cascade CD4020 frequency divider and a magnetic control switch respectively arranged at point A at the end of the water inlet channel and point B at the water inlet, the crystal oscillator module is connected with the cascade CD4020 frequency divider, and is used to control the magnetic control switch at point A, and to start the system once at a specified time. The mud scraping trolley module comprises a trolley body, a telescopic mud scraping arm and a double relay, the trolley body is installed on the inner wall of the water inlet channel, the bottom of the trolley body is provided with a wheel set, the trolley body can walk along the inner wall, and the double relay is used for controlling the forward and reverse rotation of the trolley motor, so that the walking and returning to the starting point of the trolley are realized. The sewage suction pump module is arranged at the B point and comprises a sewage suction pump, a sewage discharge pipe, a magnetic control switch and a 555 monostable, the sewage suction pump is connected with the sewage discharge pipe, the magnetic control switch is connected with the 555 monostable, when the mud scraping trolley reaches the position of the sewage suction pump, the magnetic control switch is triggered, and then the 555 monostable is triggered, so that the sewage suction pump is opened, and after a set time, the 555 monostable outputs a low level, and the sewage suction pump is closed.

[0006] Further, the solar module comprises an 18V / 5W solar panel, a TP4056 charging module, a 1N5819 diode, a DW01A protection board, a 3.7V lithium battery, an XL6009 voltage boosting module, an LM7805 5V voltage stabilizer, an LED indicator lamp and a power switch; the 18V / 5W solar panel is connected with the TP4056 charging module, the TP4056 charging module is connected with the 3.7V lithium battery, the 1N5819 diode and the DW01A protection board are used for overload protection of the 3.7V lithium battery, the 3.7V lithium battery is connected with the XL6009 voltage boosting module, the XL6009 voltage boosting module outputs a voltage of 12V, and the LM7805 5V voltage stabilizer is connected with the XL6009 voltage boosting module and provides power supply for the LED indicator lamp.

[0007] Further, the LED indicator lamp comprises a red LED at point A and a green LED at point B, which are respectively used for indicating the state of the mud scraping trolley at point A and point B.

[0008] Further, the wheel set of the trolley body comprises walking wheels and guide wheels, and the guide wheels are used for guiding the trolley to walk along the inner wall of the water inlet channel.

[0009] Further, the telescopic mud scraping arm comprises a mud scraping plate supporting arm and a telescopic scraping plate, and the telescopic scraping plate can be telescoped according to the width change of the water inlet channel.

[0010] Further, the sewage suction pump is a 12V / 0.5A water pump, which is connected with the 555 monostable through an IRF540NMOSFET, and the crystal oscillator module adopts a 32.768kHz crystal oscillator.

[0011] Further, the starting time of the system is set to 12 hours, and the running time of the sewage suction pump is set to 5 minutes.

[0012] The application also provides a floating mud cleaning method for a water inlet channel of a secondary sedimentation tank, which adopts the automatic floating mud cleaning system for the water inlet channel of the secondary sedimentation tank and comprises the following steps. S1. The solar panel generates electricity and charges the 3.7V lithium battery through the TP4056 charging module. The 1N5819 diode and DW01A protection board provide overload protection for the battery. The lithium battery is then connected to the XL6009 boost module to increase the output voltage to 12V. The LM78055V voltage regulator provides power for the LED indicator. S2. In the initial state of the system, the scraper trolley is parked at point A. The main control system crystal oscillator module + cascaded CD4020 frequency divider controls the magnetic control switch at point A. It is started once every 12 hours. The first relay of the scraper trolley is energized, the motor starts to rotate forward, and the trolley moves along the inner wall of the water inlet channel to point B where the sewage suction pump is located. During the movement, the retractable scraper arm installed on the scraper trolley can adapt to the changes in the width of the water inlet channel and scrape the floating mud in the water inlet channel to point B where the sewage suction pump is located; S3. When the scraper trolley reaches point B, the magnetic switch at point B is triggered, the comparator outputs a high level, the relay is disconnected, the trolley motor stops rotating forward, and the sewage suction pump module 555 monostable is triggered at the same time. The sewage suction pump starts, sucks in the floating mud, and discharges the floating mud to the skimming pipe in the secondary sedimentation tank through the sewage discharge pipe. S4. After the sewage suction pump has been running for 5 minutes, the 555 monostable outputs a low level, the sewage suction pump stops running, and at the same time, the scraper trolley relay 2 is energized, the trolley motor reverses, and the trolley returns to point A along the inner wall of the inlet channel, triggering the magnetic control switch at point A. The second relay of the scraper trolley is disconnected, the trolley motor stops, and the entire system enters the next cycle.

[0013] Furthermore, in step S2, when the scraper trolley moves along the inner wall of the water inlet channel, the guide wheels play a role in guiding the direction, ensuring that the trolley moves along the predetermined track.

[0014] Furthermore, in step S3, after the sewage suction pump is started, the green LED at point B lights up, indicating that the sewage suction pump is working; when the scraper trolley returns to point A, the red LED at point A lights up, indicating that the system is in the initial standby state.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. It adopts solar power supply, making full use of the characteristics of the open-air setting of the secondary sedimentation tank. It does not require an external power supply, saves energy consumption, reduces the electricity cost of system operation, and complies with the environmental protection concept of energy saving and consumption reduction.

[0016] 2. Realize unmanned operation. Through the timed start of the main control system, the scraper trolley automatically moves and returns, and the sewage suction pump automatically runs and stops without human intervention, saving a lot of labor costs and avoiding the safety risk of falling into the water caused by personnel cleaning operations near the water.

[0017] 3. The retractable scraping arm of the scraper can adapt well to the width change of the variable width oxhorn trough inlet channel. During the movement, the floating mud can be effectively scraped to the position of the sewage pump, ensuring the scraping effect and solving the problem of difficult cleaning of floating mud in the variable width inlet channel.

[0018] 4. The modules of the system cooperate and coordinate with each other, and the entire cleaning process is automatically controlled through magnetic switches, relays, monostable and other components. The operation is stable and reliable, which improves the efficiency and quality of floating sludge cleaning, ensures the smooth flow of the secondary sedimentation tank inlet channel and the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 This is the plan of the secondary sedimentation tank; Figure 2 for Figure 1 Enlarge the floor plan at point X; Figure 3 This is a structural schematic diagram of the mud scraper at point A according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of the mud scraper at point B according to an embodiment of the present invention; Figure 5 2 is a system block diagram of an embodiment of the present invention.

[0020] Among them, there are solar panels 1, trolley body 2, scraper arm 3, retractable scraper 4, scraper guide wheel 5, walking wheel 6, guide wheel 7, sewage suction pump 8, sewage pipe 9, scum bucket 10, water inlet channel 11, water outlet channel 12, and water inlet 13. DETAILED DESCRIPTION

[0021] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-5 As shown, an automatic cleaning system for floating mud in the inlet channel of a secondary sedimentation tank includes a solar module, a main control system, a mud scraping trolley module and a sewage suction pump 8 module.

[0023] The solar module includes an 18V / 5W solar panel, a TP4056 charging module, a 1N5819 diode, a DW01A protection board, two 3.7V lithium batteries with a capacity of 4000mAh, an XL6009 boost module, an LM78055V voltage regulator, an LED indicator, and a power switch. The 18V / 5W solar panel is connected to the TP4056 charging module, which in turn is connected to the 3.7V lithium battery. The 1N5819 diode and DW01A protection board provide overload protection for the 3.7V lithium battery. The 3.7V lithium battery is connected to the XL6009 boost module, which has a 12V output voltage. The LM78055V voltage regulator is connected to the XL6009 boost module to provide power for the LED indicator. The LED indicators include a red LED at point A and a green LED at point B, indicating the status of the scraper at points A and B, respectively.

[0024] The main control system consists of a 32.768kHz crystal oscillator module, a cascaded CD4020 frequency divider, and magnetic switches located at point A at the end of inlet channel 11 and at point B at the water inlet of inlet channel 11. Adjacent to inlet channel 11 is outlet channel 12. The crystal oscillator module, connected to the cascaded CD4020 frequency divider, controls the magnetic switch at point A, activating the system every 12 hours.

[0025] The scraper trolley module consists of a trolley body 2, a retractable scraper arm, and dual relays. The trolley body 2 is mounted on the inner wall of the water inlet channel 11. Its base is equipped with a wheel assembly consisting of running wheels 6 and guide wheels 7, which guide the trolley along the inner wall of the water inlet channel 11. The retractable scraper arm includes a scraper blade support arm 3 and a retractable scraper blade 4, which can be extended or retracted according to the width of the water inlet channel 11. The dual relays control the forward and reverse rotation of the trolley motor, enabling the trolley to travel and return to its starting point.

[0026] The sewage pump module 8 is located at point B and includes the sewage pump 8, a 12V / 0.5A water pump, a sewage pipe 9, a magnetic switch, and a 555 monostable. The sewage pump 8 is connected to the sewage pipe 9, through which it discharges scum into the scum hopper 10 and ultimately out. The sewage pump 8 is connected to the 555 monostable via an IRF540N MOSFET, and the magnetic switch is also connected to the 555 monostable. When the scraper car reaches the sewage pump 8, the magnetic switch is triggered, which in turn triggers the 555 monostable, turning the sewage pump 8 on. After five minutes, the 555 monostable outputs a low level, turning the sewage pump 8 off.

[0027] Among them, such as Figure 4 As shown, the retractable scraper 4 is the core component of the scraper trolley module for cleaning floating mud. Its structure mainly includes two parts: the scraper arm 3 and the retractable scraper 4, which cooperate with the scraper guide wheel 5 to achieve the following functions: Mud scraping arm 3: as a support structure, one end is connected with the mud scraping trolley body 2, and a telescopic scraper 4 is provided with a mounting base and a force support to ensure that the scraper remains stable during movement with the trolley.

[0028] Telescopic scraper 4: directly contact with floating mud, the sleeve set matched with the spring sliding connection is adapted to the width of the water inlet channel 11, the telescopic scraper 4 cooperates with the mud scraping arm 3, and the telescopic scraper 4 can automatically adjust the extension length according to the width change of the water inlet channel 11. When the trolley walks along the variable-width horn-shaped water inlet channel 11, the scraper can extend as the water channel width increases and shrink as the water channel width decreases, so that the scraper is attached to the inner walls of the water inlet channel 11 on both sides and completely scrapes the surface floating mud.

[0029] Mud scraping plate guide wheel 5: installed on both sides or edges of the scraper, moves synchronously with the scraper, plays a guiding and limiting role in the telescopic process of the scraper, reduces the friction between the scraper and the inner wall of the water inlet channel 11, ensures smooth telescopic action, and avoids the offset of the scraper due to uneven force.

[0030] The application also provides a two-sedimentation-tank water inlet channel 11 floating mud cleaning method based on the above-mentioned two-sedimentation-tank water inlet channel 11 floating mud automatic cleaning system, and the method comprises the following steps: The solar panel 1 generates electric energy, the TP4056 charging module charges the 3.7V lithium battery, the 1N5819 diode and the DW01A protection plate provide overload protection for the battery, the lithium battery is connected with the XL6009 voltage boosting module, the output voltage is raised to 12V, and the LM7805 5V voltage stabilizer provides power supply for the LED indicator lamp.

[0031] The system is in the initial state, the mud scraping trolley is parked at point A, the red LED at point A is on, indicating that the system is in the initial standby state. The main control system 32.768kHz crystal oscillator module 5+ cascaded CD4020 frequency divider controls the A point magnetic control switch, which is started once every 12 hours. The first relay of the mud scraping trolley is attracted, the motor is started and the trolley walks along the inner wall of the water inlet channel 11. The guide wheel 7 plays a guiding role during walking, ensuring that the trolley walks along the predetermined track. When reaching point B where the sewage pump 8 is located, the telescopic mud scraping arm installed on the mud scraping trolley can adapt to the width change of the water inlet channel 11, and the floating mud in the water inlet channel 11 is scraped to point B where the sewage pump 8 is located.

[0032] After the sewage pump 8 runs for 5 minutes, the 555 monostable output is low, the sewage pump 8 stops running, the second relay of the mud scraping trolley is attracted, the trolley motor is reversed, the trolley returns to point A along the inner wall of the water inlet channel 11, the A point magnetic control switch is triggered, the second relay of the mud scraping trolley is disconnected, the trolley motor stops, the red LED at point A is on, indicating that the system is in the initial standby state, and the whole system enters the next cycle period.

[0033] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. An automatic cleaning system for floating mud in the inlet channel of a secondary sedimentation tank, characterized in that: Including solar modules, main control system, scraper module and sewage pump module; The solar module provides power for the automatic cleaning system; The main control system includes a crystal oscillator module, a cascaded CD4020 frequency divider, and magnetic switches respectively arranged at point A at the end of the water inlet channel and point B at the water inlet of the water inlet channel. The crystal oscillator module is connected to the cascaded CD4020 frequency divider to control the magnetic switch at point A and start the system once at a specified time. The scraper trolley module includes a trolley body, a retractable scraper arm, and a dual relay. The trolley body is mounted on the inner wall of the water inlet channel and has a wheel set at the bottom, which allows it to move along the inner wall. The dual relay is used to control the forward and reverse rotation of the trolley motor to achieve the movement of the trolley and return to the starting point. The sewage suction pump module is set at point B, including a sewage suction pump, a sewage pipe, a magnetic control switch and a 555 monostable. The sewage suction pump is connected to the sewage pipe, and the magnetic control switch is connected to the 555 monostable. When the scraper trolley reaches the sewage suction pump position, the magnetic control switch is triggered, and then the 555 monostable is triggered to turn on the sewage suction pump. After the set time, the 555 monostable outputs a low level and the sewage suction pump is turned off.

2. The automatic cleaning system for floating mud in the inlet channel of the secondary sedimentation tank according to claim 1 is characterized in that: The solar module includes an 18V / 5W solar panel, a TP4056 charging module, a 1N5819 diode, a DW01A protection board, a 3.7V lithium battery, an XL6009 boost module, an LM78055V voltage regulator, an LED indicator light and a power switch; the 18V / 5W solar panel is connected to the TP4056 charging module, the TP4056 charging module is connected to the 3.7V lithium battery, the 1N5819 diode and the DW01A protection board are used to protect the 3.7V lithium battery from overload, the 3.7V lithium battery is connected to the XL6009 boost module, the output voltage of the XL6009 boost module is 12V, and the LM78055V voltage regulator is connected to the XL6009 boost module to provide power for the LED indicator light.

3. The automatic cleaning system for floating mud in the inlet channel of the secondary sedimentation tank according to claim 2, characterized in that: The LED indicator lights include a red LED at point A and a green LED at point B, which are used to indicate the status of the mud scraper at point A and point B respectively.

4. The automatic cleaning system for floating mud in the inlet channel of the secondary sedimentation tank according to claim 1 is characterized in that: The wheel set of the trolley body includes walking wheels and guide wheels, and the guide wheels are used to guide the trolley to move along the inner wall of the water inlet channel.

5. The automatic cleaning system for floating mud in the inlet channel of the secondary sedimentation tank according to claim 1 is characterized in that: The retractable scraper arm comprises a scraper blade support arm and a retractable scraper blade, and the retractable scraper blade can be retracted or shortened according to the width of the water inlet channel.

6. The automatic cleaning system for floating mud in the inlet channel of the secondary sedimentation tank according to claim 1, characterized in that: The sewage suction pump is a 12V / 0.5A water pump, which is connected to a 555 monostable via an IRF540NMOSFET, and the crystal oscillator module adopts a 32.768kHz crystal oscillator.

7. The automatic cleaning system for floating mud in the inlet channel of a secondary sedimentation tank according to claim 1, characterized in that: The system startup time is set to 12 hours, and the sewage suction pump operation time is set to 5 minutes.

8. A method for automatically cleaning floating mud in the inlet channel of a secondary sedimentation tank, characterized in that: Using the automatic cleaning system according to any one of claims 1 to 7 comprises the following steps: S1. The solar panel generates electricity and charges the 3.7V lithium battery through the TP4056 charging module. The 1N5819 diode and DW01A protection board provide overload protection for the battery. The lithium battery is then connected to the XL6009 boost module to increase the output voltage to 12V. The LM78055V voltage regulator provides power for the LED indicator. S2. In the initial state of the system, the scraper trolley is parked at point A. The main control system crystal oscillator module + cascaded CD4020 frequency divider controls the magnetic control switch at point A. It is started once every 12 hours. The first relay of the scraper trolley is energized, the motor starts to rotate forward, and the trolley moves along the inner wall of the water inlet channel to point B where the sewage suction pump is located. During the movement, the retractable scraper arm installed on the scraper trolley can adapt to the changes in the width of the water inlet channel and scrape the floating mud in the water inlet channel to point B where the sewage suction pump is located; S3. When the scraper trolley reaches point B, the magnetic switch at point B is triggered, the comparator outputs a high level, the relay is disconnected, the trolley motor stops rotating forward, and the sewage suction pump module 555 monostable is triggered at the same time. The sewage suction pump starts, sucks in the floating mud, and discharges the floating mud to the skimming pipe in the secondary sedimentation tank through the sewage discharge pipe. S4. After the sewage suction pump has been running for 5 minutes, the 555 monostable outputs a low level, the sewage suction pump stops running, and at the same time, the scraper trolley relay 2 is energized, the trolley motor reverses, and the trolley returns to point A along the inner wall of the inlet channel, triggering the magnetic control switch at point A. The second relay of the scraper trolley is disconnected, the trolley motor stops, and the entire system enters the next cycle.

9. The method for automatically cleaning floating mud in the inlet channel of a secondary sedimentation tank according to claim 8, characterized in that: In step S2, when the scraper trolley moves along the inner wall of the water inlet channel, the guide wheels play a role in guiding the direction to ensure that the trolley moves along the predetermined track.

10. The method for automatically cleaning floating mud in the inlet channel of a secondary sedimentation tank according to claim 8, characterized in that: In step S3, after the sewage suction pump is started, the green LED at point B lights up, indicating that the sewage suction pump is working; when the scraper trolley returns to point A, the red LED at point A lights up, indicating that the system is in the initial standby state.

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