A cleaning device for the outlet weir of a secondary sedimentation tank

Abstract

The utility model provides a cleaning device for the outlet weir of a secondary sedimentation tank, which is installed on the frame of the scraper of the secondary sedimentation tank itself, and includes a flushing system and a dosing system. The flushing system includes a high-pressure water pump, a flushing pipeline, a mounting pipe and a nozzle. The high-pressure water pump is fixed to the upper layer below the liquid level of the secondary sedimentation tank through a fixing rod. The flushing pipeline is connected to the high-pressure water pump and fixed to the frame. The mounting pipe is vertically fixedly installed at the end of the frame and located above the outlet weir. The nozzle is fixedly installed at the end of the mounting pipe and faces the side wall of the outlet weir. The nozzle is connected to the flushing pipeline. The dosing system includes a dosing barrel and a dosing pipeline. The rack barrel is fixed on the frame. A valve is arranged on the dosing pipeline. The end of the dosing pipeline is arranged at the end of the mounting pipe. The moss on the outlet weir of the secondary sedimentation tank can be effectively removed through the dual effects of high-pressure flushing water and the addition of sodium hypochlorite agent in the dosing barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a cleaning device for a secondary sedimentation tank outlet weir. Background Art

[0002] The secondary sedimentation tank is an important component of the traditional activated sludge process sewage treatment plant. It is mainly used to separate the mud and water in the biochemical system and intercept the activated sludge. Its operation effect directly affects the sustainability of the biochemical system and the effluent quality.

[0003] The effluent from the secondary sedimentation tank is rich in nutrients, has a suitable temperature and sufficient sunlight. The effluent weir is prone to moss growth. If it is not cleaned in time, it will block the weir of the secondary sedimentation tank, resulting in uneven effluent and even short-circuit, affecting the effluent quality. Especially for the radial flow sedimentation tank commonly used in large and medium-sized sewage treatment plants, due to its long circumference and insufficient cleaning frequency, the situation of moss adhering to the effluent weir is particularly serious.

[0004] At present, the commonly used cleaning methods are mechanical cleaning and manual cleaning. The mechanical cleaning method mainly involves installing a cleaning brush or scraper on a rotating scraper plate or bridge frame. During the rotation of the scraper plate or bridge frame, the moss is removed by rotating the cleaning brush or scraper. Due to the design or construction of the tank body, the concentricity of the outlet weir is insufficient, the cleaning brush and scraper are worn out, and some areas cannot be cleaned. Most plants and stations have idled this facility. Although manual cleaning is cleaner, it requires water cleaning. First, there are safety hazards. Second, the labor intensity is high (generally, it takes two working days to clean the outlet weir of a φ35 secondary sedimentation tank. To maintain cleanliness, it needs to be cleaned once every half a month); third, in order to ensure the water discharge index, some production cuts are required. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a secondary sedimentation tank effluent weir cleaning device. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A secondary sedimentation tank outlet weir cleaning device is installed on the frame of the secondary sedimentation tank's own scraper, including a flushing system and a dosing system. The flushing system includes a high-pressure water pump, a flushing pipeline, a mounting pipe and a nozzle. The high-pressure water pump is fixed to the upper layer below the liquid surface of the secondary sedimentation tank by a fixing rod. The flushing pipeline is connected to the high-pressure water pump and fixed to the frame. The mounting pipe is vertically fixedly installed at the end of the frame and is located above the outlet weir. The nozzle is fixedly installed at the end of the mounting pipe and faces the side wall of the outlet weir. The nozzle is connected to the flushing pipeline. The dosing system includes a dosing barrel and a dosing pipeline. The rack barrel is fixed on the frame. A valve is arranged on the dosing pipeline. The end of the dosing pipeline is arranged at the end of the mounting pipe.

[0007] Furthermore, a sliding block is slidably connected to the mounting tube, the sliding block is mounted on a frame, a first electric hydraulic cylinder is fixedly connected to the sliding block, one end of the mounting tube where the nozzle is arranged is fixedly connected to a fixed plate, and the telescopic shaft of the first electric hydraulic cylinder is fixedly connected to the fixed plate.

[0008] Furthermore, the sliding block is slidably matched with the frame so that the sliding block slides horizontally on the frame, and a second electric hydraulic cylinder is fixedly mounted on the frame, and a telescopic shaft of the second electric hydraulic cylinder is fixedly connected to the sliding block.

[0009] Furthermore, the nozzles are symmetrically arranged on the mounting tube, and are arranged in two upper and lower rows.

[0010] Furthermore, the nozzle is arranged to be inclined downward to flush the top, sides and bottom of the water outlet weir.

[0011] Furthermore, the valve on the dosing pipeline is a solenoid valve.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The moss on the effluent weir of the secondary sedimentation tank can be effectively removed through the dual effects of high-pressure flushing water and the addition of sodium hypochlorite in the dosing barrel;

[0014] 2. The cleaning device runs continuously, causing only a very small disturbance in the water discharge at the initial stage of cleaning, which does not affect the water quality of the entire pool. After continuous and stable operation, the disturbance is even smaller and will not cause production suspension;

[0015] 3. The cleaning water comes from the supernatant of the secondary sedimentation tank, and no external flushing water source is required;

[0016] 4. Automatic flushing of the cleaning device reduces manual labor intensity and reduces safety risks in water-related operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the cutaway structure of an embodiment of the utility model.

[0019] In the above drawings: frame 1, high-pressure water pump 2, flushing pipeline 3, mounting pipe 4, nozzle 5, fixing rod 6, dosing barrel 7, dosing pipeline 8, valve 9, sliding block 10, first electric hydraulic cylinder 11, fixing plate 12, second electric hydraulic cylinder 13. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, an embodiment of the utility model proposes a secondary sedimentation tank outlet weir cleaning device, which is installed on the frame 1 of the secondary sedimentation tank's own scraper, and includes a flushing system and a dosing system. The flushing system includes a high-pressure water pump 2, a flushing pipeline 3, a mounting pipe 4 and a nozzle 5. The high-pressure water pump 2 is fixed to the upper layer below the liquid level of the secondary sedimentation tank by a fixing rod 6. The flushing pipeline 3 is connected to the high-pressure water pump 2 and fixed on the frame 1. The mounting pipe 4 is vertically fixedly installed at the end of the frame 1 and is located above the outlet weir. The nozzle 5 is fixedly installed at the end of the mounting pipe 4 and faces the side wall of the outlet weir. The nozzle 5 is connected to the flushing pipeline 3. The dosing system includes a dosing barrel 7 and a dosing pipeline 8. The frame medicine barrel is fixed on the frame 1. The dosing pipeline 8 is provided with a valve 9. The end of the dosing pipeline 8 is set at the end of the mounting pipe 4.

[0022] When the secondary sedimentation tank is not stopped, the high-pressure water pump 2 is turned on to extract the supernatant from the secondary sedimentation tank. The high-pressure water passes through the flushing pipeline 3 and the nozzle 5 and acts on the moss on the outlet weir to wash away the moss. As the frame 1 moves along the tank wall, the high-pressure water can rotate synchronously to clean all the surrounding outlet weirs, saving cleaning and maintenance time and reducing manual labor intensity.

[0023] Sodium hypochlorite solution is added to the flushing water through the dosing barrel 7 and the dosing pipeline 8, and acts on the moss at the outlet weir through the flushing water, killing or inhibiting the moss. Sodium hypochlorite is put into the water and instantly hydrolyzes to form hypochlorous acid and hypochlorite ions, which quickly diffuse to the surface of algae and penetrate the cell wall. The strong oxidizing property of hypochlorous acid destroys the protein and other enzyme systems of algae, thereby killing the algae and facilitating the dead algae to fall off the pool wall. The residual sodium hypochlorite in the water has a certain inhibitory effect on the formation of bacteria and algae, thereby slowing down the re-formation of algae.

[0024] In this embodiment, if Figure 1 As shown, a sliding block 10 is slidably connected to the mounting tube 4, the sliding block 10 is mounted on the frame 1, a first electric hydraulic cylinder 11 is fixedly connected to the sliding block 10, one end of the mounting tube 4 where the nozzle 5 is provided is fixedly connected to a fixing plate 12, and a telescopic shaft of the first electric hydraulic cylinder 11 is fixedly connected to the fixing plate 12. The first electric hydraulic cylinder 11 is used to realize the lifting and lowering of the mounting tube 4, so that the nozzle 5 can fully clean the water outlet weir, thereby improving the cleaning effect.

[0025] In this embodiment, if Figure 1As shown, the sliding block 10 is slidably matched with the frame 1, so that the sliding block 10 slides horizontally on the frame 1, and a second electric hydraulic cylinder 13 is fixedly installed on the frame 1, and the telescopic shaft of the second electric hydraulic cylinder 13 is fixedly connected to the sliding block 10. The sliding of the sliding block 10 on the frame 1 is adjusted by the second electric hydraulic cylinder 13 to adjust the nozzle 5 to the inner side of the water outlet weir, so as to facilitate cleaning of the inner wall of the water outlet weir close to the center of the secondary sedimentation tank.

[0026] In this embodiment, if Figure 1 As shown, the nozzles 5 are symmetrically arranged on the mounting pipe 4 and are arranged in two rows, one above the other, so as to increase the flushing area of ​​the nozzles 5, reduce the number of times the nozzles 5 are adjusted, save costs, and improve cleaning efficiency.

[0027] In this embodiment, if Figure 1 As shown, the nozzle 5 is arranged downwardly at an angle to flush the top, side and bottom of the water outlet weir. The inclined nozzle 5 increases the impact force of the nozzle 5 flushing and improves the flushing effect.

[0028] In this embodiment, the valve 9 on the dosing pipeline 8 is a solenoid valve, which is convenient for real-time adjustment of the amount of the added agent during the flushing process and is easy to use.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A secondary sedimentation tank effluent weir cleaning device, installed on the frame of the secondary sedimentation tank's own scraper, characterized in that: It includes a flushing system and a dosing system. The flushing system includes a high-pressure water pump, a flushing pipeline, a mounting pipe and a nozzle. The high-pressure water pump is fixed to the upper layer below the liquid level of the secondary sedimentation tank by a fixing rod. The flushing pipeline is connected to the high-pressure water pump and fixed on the frame. The mounting pipe is vertically fixed at the end of the frame and is located above the outlet weir. The nozzle is fixed at the end of the mounting pipe and faces the side wall of the outlet weir. The nozzle is connected to the flushing pipeline. The dosing system includes a dosing barrel and a dosing pipeline. The dosing barrel is fixed on the frame. A valve is arranged on the dosing pipeline. The end of the dosing pipeline is arranged at the end of the mounting pipe.

2. A secondary sedimentation tank effluent weir cleaning device as claimed in claim 1, characterized in that: The mounting tube is slidably connected with a sliding block, the sliding block is mounted on a frame, the sliding block is fixedly connected with a first electric hydraulic cylinder, one end of the mounting tube where a nozzle is arranged is fixedly connected with a fixing plate, and the telescopic shaft of the first electric hydraulic cylinder is fixedly connected with the fixing plate.

3. A secondary sedimentation tank effluent weir cleaning device as claimed in claim 2, characterized in that: The sliding block is slidably matched with the frame so that the sliding block slides horizontally on the frame. A second electric hydraulic cylinder is fixedly mounted on the frame, and a telescopic shaft of the second electric hydraulic cylinder is fixedly connected to the sliding block.

4. A secondary sedimentation tank effluent weir cleaning device as claimed in claim 1, characterized in that: The nozzles are symmetrically arranged on the mounting tube, and are arranged in two upper and lower rows.

5. A secondary sedimentation tank effluent weir cleaning device as claimed in claim 4, characterized in that: The spray head is arranged obliquely downward and is used for flushing the top, side and bottom of the water outlet weir.

6. A secondary sedimentation tank effluent weir cleaning device as claimed in claim 1, characterized in that: The valve on the dosing pipeline is a solenoid valve.

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