Spraying and flushing device for secondary sedimentation tank

Abstract

The utility model relates to a secondary sedimentation tank spray flushing device which comprises a central rotary type single-pipe suction dredger and a water spraying device, the water spraying device comprises a submersible sewage pump and a water sprayer, the water sprayer is horizontally erected above a sludge scraper of the single-pipe suction dredger, and the submersible sewage pump is hung at the front end of the sludge scraper and located below the water surface of a secondary sedimentation tank. And a water outlet of the submersible sewage pump is connected with the water spraying device and is driven by the single-pipe suction dredger to spray and wash float sludge on the water surface of the whole secondary sedimentation tank. The water spraying device is arranged, scum in the water inlet gallery is scattered through high-pressure water spraying, the problem of scum accumulation in the water inlet gallery is solved, and smooth water inlet of the secondary sedimentation tank is guaranteed; meanwhile, the removal efficiency of the scum on the water surface of the secondary sedimentation tank is also enhanced, and the smoothness of a water outlet channel of the secondary sedimentation tank is also ensured by continuously flushing the scum in the triangular weir plate area.

Description

Technical Field

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

[0002] The existing secondary sedimentation tank of the sewage treatment plant is prone to unstable sludge shape and poor sedimentation performance due to large fluctuations in temperature during the change of seasons, which causes the sludge to float and form scum accumulation on the pool surface, affecting the sensory effects of the area; at the same time, the water inlet corridor of the secondary sedimentation tank is affected by the scum accumulation, resulting in poor water inlet, affecting the normal operating load of the secondary sedimentation tank and causing certain pressure on the stable operation of subsequent structures.

[0003] When a large amount of scum appears on the surface of the secondary sedimentation tank, the existing single-tube sludge suction machine for the secondary sedimentation tank cannot completely scrape the surface of the tank; as time goes on, the accumulation of scum on the surface of the tank will also cause the growth rate of flocs in the triangular weir plate area of ​​the outlet to accelerate, and the original manual cleaning frequency cannot meet the requirements of on-site operation; when the operating load of the secondary sedimentation tank increases, there will be a tendency for scum in the water inlet gallery to float up, which may cause the scum to overflow into the outlet gallery, resulting in high suspended solids in the outlet of the secondary sedimentation tank, increasing the operating pressure of subsequent structures. Therefore, the sewage treatment plant will regularly organize a large number of staff to wash and salvage the scum in the secondary sedimentation tank, and in serious cases, the equipment will be stopped for comprehensive cleaning, which not only increases the labor intensity of the workers, but also greatly increases the production cost of the enterprise. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a secondary sedimentation tank spray flushing device. The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] A secondary sedimentation tank spray flushing device comprises a centrally rotating single-tube sludge suction machine and a water spray device, wherein the water spray device comprises a submersible sewage pump and a water sprayer, wherein the water sprayer is horizontally mounted above a sludge scraper of the single-tube sludge suction machine, wherein the submersible sewage pump is hung at the front end of the sludge scraper and is located below the water surface of the secondary sedimentation tank, wherein a T-joint is connected to the water outlet of the submersible sewage pump, wherein the two ends of the T-joint are respectively connected to a main pipeline and a secondary pipeline of the water sprayer, wherein a main nozzle is arranged on the side of the front end of the main pipeline, and secondary nozzles are arranged at intervals on the side of the secondary pipeline, wherein the front end ports of the main pipeline and the secondary pipeline are both in a closed state, wherein the main nozzle and the secondary nozzle are driven by the single-tube sludge suction machine to spray and flush the floating mud on the entire water surface of the secondary sedimentation tank.

[0006] In a specific embodiment of the utility model, an outlet gallery is arranged around the periphery of the secondary sedimentation tank, and an inlet gallery is arranged around the periphery of the outlet gallery. The main pipeline extends toward the outside of the secondary sedimentation tank and is erected above the outlet gallery and the inlet gallery. The secondary pipeline extends toward the center of the secondary sedimentation tank along the scraper and is erected above the water surface in the center of the secondary sedimentation tank.

[0007] In a specific embodiment of the present invention, the diameter of the main pipeline is larger than the diameter of the secondary pipeline, and the main pipeline is shorter than the secondary pipeline.

[0008] The main nozzle is arranged above the water inlet gallery, and is used for spraying and flushing the floating mud in the water inlet gallery, and the spraying direction is opposite to the water flow direction of the water inlet gallery; the spraying direction of the auxiliary nozzle is opposite to that of the main nozzle, and is used for spraying and flushing the floating mud on the central water surface of the secondary sedimentation tank.

[0009] In a specific embodiment of the present utility model, the main nozzle and the auxiliary nozzle are both universal duckbill nozzles, and the spraying range and spraying intensity of the main nozzle are greater than the spraying range and spraying intensity of the auxiliary nozzle.

[0010] In a specific embodiment of the utility model, a valve is provided at the connection between the main nozzle and the main pipeline, and a valve is provided at the connection between the secondary pipeline and the T-joint.

[0011] In a specific embodiment of the utility model, a through hole is opened on the bottom surface of the main pipeline, the through hole is connected to a Y-type joint, and the two ends of the Y-type joint are respectively connected to a third nozzle and a fourth nozzle. The third nozzle is used to flush the scum on the triangular weir plate arranged at the top of the side wall of the second sedimentation tank, and the fourth nozzle is used to flush the scum on the side wall of the outlet gallery.

[0012] A valve is provided at the connection between the Y-shaped joint and the main pipeline.

[0013] In a specific embodiment of the utility model, a sliding power supply coil is arranged at the rotating part of the single-tube dredge suction machine, and the sliding power supply coil is connected to the submersible sewage pump.

[0014] In a specific embodiment of the utility model, the secondary sedimentation tank spray flushing device also includes a control system, which is electrically connected to the water spray device and is used to control the start and stop time and working time of the secondary sedimentation tank spray flushing device.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides a water spraying device to disperse the scum in the water inlet gallery through high-pressure water spray, thereby eliminating the problem of scum accumulation in the water inlet gallery and ensuring smooth water inlet to the secondary sedimentation tank; at the same time, it also enhances the efficiency of removing scum on the water surface of the secondary sedimentation tank, and through continuous flushing of the scum in the triangular weir plate area, it also ensures smooth water outlet channel of the secondary sedimentation tank.

[0017] The utility model is not only simple and practical in design, low in operating cost, and convenient in daily maintenance, but also reduces the intensity of manual work, thus greatly saving production costs for enterprises. In addition, the submersible sewage pump of the utility model is arranged in the secondary sedimentation tank, and the original water resources in the tank are used to wash the floating mud in the secondary sedimentation tank, which will not cause waste of water resources and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view of the structure of the secondary sedimentation tank spray flushing device provided by the embodiment of the utility model;

[0019] Figure 2 A structural cross-sectional view of a secondary sedimentation tank spray flushing device provided in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the triangular weir structure of the secondary sedimentation tank;

[0021] In the figure, 100-single-tube mud suction machine; 200-water spraying device; 101-mud scraper; 102-rotating shaft; 103-water outlet gallery; 104-water inlet gallery; 105-triangular weir plate; 106-slag bucket; 201-submersible sewage pump; 202-main pipeline; 203-auxiliary pipeline; 204-main nozzle; 205-auxiliary nozzle; 206-first valve; 207-third nozzle; 208-fourth nozzle; 209-sliding power supply coil. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with specific implementation modes, but the implementation modes of the present invention are not limited thereto.

[0023] like Figure 1As shown, a secondary sedimentation tank spraying and flushing device comprises a central rotating single-tube sludge suction machine 100 and a water spraying device 200, wherein the water spraying device 200 comprises a submersible sewage pump 201 and a water sprayer, wherein the water sprayer is horizontally mounted above the scraper 101 of the single-tube sludge suction machine 100, the submersible sewage pump 201 is hung at the front end of the scraper 101 and is located below the water surface of the secondary sedimentation tank, a T-shaped joint is connected to the water outlet of the submersible sewage pump 201, and the two ends of the T-shaped joint are respectively connected to the main pipeline 202 and the auxiliary pipeline 203 of the water sprayer, a main nozzle 204 is arranged on the side of the front end of the main pipeline 202, and auxiliary nozzles 205 are arranged at intervals on the side of the auxiliary pipeline 203, and the front end ports of the main pipeline 202 and the auxiliary pipeline 203 are both in a closed state, and the main nozzle 204 and the auxiliary nozzle 205 are driven by the single-tube sludge suction machine 100 to spray and flush the floating mud on the entire water surface of the secondary sedimentation tank.

[0024] The secondary sedimentation tank of a sewage treatment plant is usually circular, and mainly includes a secondary sedimentation tank with a radius of about 20 meters. An outlet gallery 103 is arranged around the periphery of the secondary sedimentation tank, and an inlet gallery 104 is arranged around the periphery of the outlet gallery 103. Water inlet holes are arranged at intervals at the bottom of the inlet gallery 104. The water inlet holes pass through the bottom of the outlet gallery 103 to send sewage into the secondary sedimentation tank. After the sewage that continuously flows into the secondary sedimentation tank is precipitated, the clean water above will overflow outward and flow into the outer outlet gallery 103.

[0025] Generally, a central rotating single-tube sludge suction machine 100 is set in the pool to scrape the lighter scum floating on the water surface in the sewage. The single-tube sludge suction machine 100 includes a rotating shaft 102 vertically arranged at the center of the pool bottom and a scraper 101 horizontally arranged on the water surface. The scraper 101 is equivalent to the radius of the circular secondary sedimentation tank, and the tail end is connected to the rotating shaft 102, and the front end extends to the top of the side wall of the secondary sedimentation tank. In the working state, the scraper 101 rotates counterclockwise like the hands of a clock, and is used to scrape the scum on the water surface in the secondary sedimentation tank until the scraped scum is pushed into the slag bucket 106 arranged near the side wall of the secondary sedimentation tank. However, it is difficult for the existing single-tube sludge suction machine 100 to completely sweep away the scum on the water surface. When the clean water in the upper part of the secondary sedimentation tank overflows to the outlet gallery 103, the scum will be blocked on the triangular weir plate 105 set on the top of the side wall of the secondary sedimentation tank, resulting in poor water discharge. In addition, there are a lot of sludge and scum in the sewage sent into the secondary sedimentation tank by the inlet gallery 104. Long-term operation will cause poor water supply to the inlet gallery 104 or even blockage. In severe cases, the sewage will overflow into the outside of the tank or even into the adjacent outlet gallery 103, causing secondary pollution of the clean water flowing into the outlet gallery 103, resulting in serious consequences.

[0026] The various parts of the secondary sedimentation tank spray flushing device of the utility model are explained below by using examples.

[0027] like Figure 1As shown, the utility model has an outlet gallery 103 arranged around the periphery of the secondary sedimentation tank, and an inlet gallery 104 arranged around the periphery of the outlet gallery 103. The main pipeline 202 extends toward the outside of the secondary sedimentation tank and is erected above the outlet gallery 103 and the inlet gallery 104. The secondary pipeline 203 extends toward the center of the secondary sedimentation tank along the scraper 101 and is erected above the water surface in the center of the secondary sedimentation tank.

[0028] The diameter of the main pipeline 202 of the present invention is larger than the diameter of the secondary pipeline 203 , and the main pipeline 202 is shorter than the secondary pipeline 203 .

[0029] The main nozzle 204 of the utility model is arranged above the water inlet gallery 104, and is used for spraying and flushing the floating mud in the water inlet gallery 104, and the water spraying direction is opposite to the water flow direction of the water inlet gallery 104; the water spraying direction of the auxiliary nozzle 205 is opposite to that of the main nozzle 204, and is used for spraying and flushing the floating scum on the central water surface of the secondary sedimentation tank.

[0030] In a specific embodiment of the utility model, a water sprinkler is mounted on the scraper 101, and the water sprinkler includes a main pipe 202 and a secondary pipe 203. The main pipe 202 and the secondary pipe 203 are connected to the water outlet of the submersible sewage pump 201 through a T-joint. The main pipe 202 extends toward the periphery of the secondary sedimentation tank and is mounted above the outlet gallery 103 and the inlet gallery 104. A main nozzle 204 is arranged on the side of the main pipe 202 above the inlet gallery 104. It should be noted that the water flow direction of the inlet gallery 104 is clockwise, while the water spraying direction of the main nozzle 204 is opposite thereto, that is, the main nozzle 204 is arranged in the direction in which the scraper 101 runs, which can increase the inlet The auxiliary pipe 203 extends toward the direction of the central rotation axis 102 of the pool and is erected above the scraper 101. An auxiliary nozzle 205 is arranged at intervals on the auxiliary pipe 203 on the side opposite to the main nozzle 204. That is to say, the main nozzle 204 and the auxiliary nozzle 205 have opposite water spraying directions. The reason for this arrangement is that the auxiliary nozzle 205 is located above the scraper 101. When the scraper 101 is running counterclockwise, there are still some residual and agglomerated scum on the water surface after scraping. At this time, the auxiliary nozzle 205 at the rear is sprayed and swept to break up the agglomerated scum, so that the scraper 101 that runs again can scrape the scum for the second time.

[0031] In a specific embodiment of the present invention, both the main nozzle 204 and the auxiliary nozzle 205 are universal duckbill nozzles, and the spraying range and spraying intensity of the main nozzle 204 are greater than the spraying range and spraying intensity of the auxiliary nozzle 205 .

[0032] Specifically, the diameter of the main pipe 202 is larger than that of the auxiliary pipe 203. The reason is that the water inlet corridor 104 not only has scum, but also has sludge, and the amount of scum is greater than the amount of scum on the water surface of the secondary sedimentation tank. Therefore, the spraying range and spraying intensity of the main nozzle 204 are greater than the spraying range and spraying intensity of the auxiliary nozzle 205. The size of the main nozzle 204 is larger than the size of the auxiliary nozzle 205. The universal duckbill nozzle is used to further increase the water spraying intensity and increase the spraying area; the main pipe 202 is shorter than the auxiliary pipe 203 because the main pipe 202 is only erected on the water outlet corridor 103 and the water inlet corridor 104, and the auxiliary pipe 203 is equivalent to the radius of the secondary sedimentation tank, which is about 20 meters. Although the water spraying intensity is not as strong as that of the main nozzle 204, the coverage area is very wide.

[0033] Furthermore, in a specific embodiment of the present invention, the main pipe 202 is preferably DN65, and the auxiliary pipe 203 is preferably DN32; one main nozzle 204 can be provided, and several auxiliary nozzles 205 can be provided, and preferably, each two auxiliary nozzles 205 are spaced 80 cm apart.

[0034] In a specific embodiment of the present invention, a first valve 206 is provided at the connection between the main nozzle 204 and the main pipeline 202, and a second valve is provided at the connection between the auxiliary pipeline 203 and the T-shaped joint.

[0035] Specifically, a first valve 206 is provided at the rear end of the main nozzle 204, that is, at the connection with the main pipe 202, and a second valve is provided at the connection between the auxiliary pipe 203 and the T-joint. This arrangement not only facilitates daily maintenance and disassembly and assembly of the equipment, but also allows the flushing position to be freely selected according to needs.

[0036] like Figure 2 As shown, as an embodiment, a through hole is opened on the bottom surface of the main pipeline 202 of the utility model, and the through hole is connected to a Y-type joint. The two ends of the Y-type joint are respectively connected to a third nozzle 207 and a fourth nozzle 208. The third nozzle 207 is used to flush the scum on the triangular weir plate 105 set at the top of the side wall of the second sedimentation tank, and the fourth nozzle 208 is used to flush the scum on the side wall of the outlet gallery 103.

[0037] A third valve is provided at the connection between the Y-shaped joint and the main pipeline 202 of the utility model.

[0038] Specifically, a through hole is opened on the bottom surface of the main pipeline 202, and the through hole is connected to a Y-type joint. The two ends of the Y-type joint are respectively connected to the third nozzle 207 and the fourth nozzle 208. The third nozzle 207 is used to flush the scum on the triangular weir plate 105 set at the top of the side wall of the second sedimentation tank, and the fourth nozzle 208 is used to flush the scum on the side wall of the outlet gallery 103.

[0039] like Figure 3 As shown, a triangular weir plate 105 is provided at the top of the side wall of the secondary sedimentation tank to intercept the scum floating on the water surface when the clean water after sedimentation overflows into the outlet gallery 103. However, long-term interception will cause the triangular weir plate 105 to be blocked, affecting the overall water discharge efficiency of the secondary sedimentation tank. The function of the third nozzle 207 is to disperse the scum gathered in the area of ​​the triangular weir plate 105 to ensure smooth water discharge. However, the overflowing water for a long time will form a layer of dirt on the side wall of the outlet gallery 103, which not only affects the sensory effect of the area, but also has a certain impact on the discharged water quality. The fourth nozzle 208 uses high-pressure water spraying to prevent dirt from forming on the side wall of the outlet gallery 103, thereby ensuring the cleanliness of the side wall of the outlet gallery 103.

[0040] Furthermore, a third valve is also provided at the rear end of the Y-shaped joint to control the flushing demand of the triangular weir plate 105 area.

[0041] In a specific embodiment of the utility model, a sliding power supply coil 209 is provided at the rotating part of the single-tube dredge suction machine 100 , and the sliding power supply coil 209 is connected to the submersible sewage pump 201 .

[0042] Specifically, when the scraper 101 rotates, it will drive the submersible sewage pump 201 mounted thereunder to rotate along the secondary sedimentation tank. The sliding power supply coil 209 is provided so that the cable connected to the power supply of the submersible sewage pump 201 will not be entangled on the rotating shaft 102 when the submersible sewage pump 201 rotates.

[0043] In a specific embodiment of the utility model, the secondary sedimentation tank spray flushing device also includes a control system, which is electrically connected to the water spray device and is used to control the start time and working time of the secondary sedimentation tank spray flushing device.

[0044] Specifically, the utility model is also provided with a control system, including electrical components such as a time relay, a start / stop button, an air circuit breaker, a short-circuit and overload protection device, and a signal light. In this way, the start time and the working time of the spray flushing device of the secondary sedimentation tank can be effectively controlled according to the monitored water inlet gallery 104 and the triangular weir plate 105 area of ​​the secondary sedimentation tank and the amount of sludge scum on the entire tank surface. At the same time, it has a fault alarm and protection function for the equipment, eliminating the inconvenience of manual real-time control and inspection.

[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A secondary sedimentation tank spray flushing device, characterized in that: It comprises a centrally rotating single-tube sludge suction machine and a water spraying device, wherein the water spraying device comprises a submersible sewage pump and a water sprayer, wherein the water sprayer is horizontally erected above the scraper of the single-tube sludge suction machine, the submersible sewage pump is hung at the front end of the scraper and is located below the water surface of the secondary sedimentation tank, the water outlet of the submersible sewage pump is connected with a T-joint, the two ends of the T-joint are respectively connected with the main pipeline and the auxiliary pipeline of the water sprayer, a main nozzle is arranged on the side of the front end of the main pipeline, and auxiliary nozzles are arranged at intervals on the side of the auxiliary pipeline, the front end ports of the main pipeline and the auxiliary pipeline are both in a closed state, and the main nozzle and the auxiliary nozzle are driven by the single-tube sludge suction machine to spray and wash the floating mud on the entire water surface of the secondary sedimentation tank.

2. The secondary sedimentation tank spray flushing device according to claim 1 is characterized in that: An outlet gallery is arranged around the periphery of the secondary sedimentation tank, and an inlet gallery is arranged around the periphery of the outlet gallery. The main pipeline extends toward the outside of the secondary sedimentation tank and is erected above the outlet gallery and the inlet gallery. The secondary pipeline extends toward the center of the secondary sedimentation tank along the scraper and is erected above the water surface in the center of the secondary sedimentation tank.

3. The secondary sedimentation tank spray flushing device according to claim 2 is characterized in that: The diameter of the main pipeline is larger than that of the secondary pipeline, and the main pipeline is shorter than the secondary pipeline.

4. The secondary sedimentation tank spray flushing device according to claim 3 is characterized in that: The main nozzle is arranged above the water inlet gallery, and is used for spraying and flushing the floating mud in the water inlet gallery, and the spraying direction is opposite to the water flow direction of the water inlet gallery; the spraying direction of the auxiliary nozzle is opposite to that of the main nozzle, and is used for spraying and flushing the floating mud on the central water surface of the secondary sedimentation tank.

5. The secondary sedimentation tank spray flushing device according to claim 4 is characterized in that: The main nozzle and the auxiliary nozzle are both universal duckbill nozzles, and the spraying range and spraying intensity of the main nozzle are greater than the spraying range and spraying intensity of the auxiliary nozzle.

6. The secondary sedimentation tank spray flushing device according to claim 5, characterized in that: A valve is provided at the connection between the main nozzle and the main pipeline, and a valve is provided at the connection between the auxiliary pipeline and the T-shaped joint.

7. The secondary sedimentation tank spray flushing device according to claim 6, characterized in that: A through hole is opened on the bottom surface of the main pipeline, and the through hole is connected to a Y-type joint. The two ends of the Y-type joint are respectively connected to a third nozzle and a fourth nozzle. The third nozzle is used to flush the scum on the triangular weir plate arranged at the top of the side wall of the second sedimentation tank, and the fourth nozzle is used to flush the scum on the side wall of the outlet gallery.

8. The secondary sedimentation tank spray flushing device according to claim 7, characterized in that: A valve is provided at the connection between the Y-shaped joint and the main pipeline.

9. The secondary sedimentation tank spray flushing device according to claim 8, characterized in that: A sliding power supply coil is arranged at the rotating part of the single-tube dredge suction machine, and the sliding power supply coil is connected to the submersible sewage pump.

10. The secondary sedimentation tank spray flushing device according to claim 9, characterized in that: The secondary sedimentation tank spray flushing device also includes a control system, which is electrically connected to the water spray device and is used to control the start and stop time and working time of the secondary sedimentation tank spray flushing device.

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