Efficient aerated grit chamber

Abstract

According to the efficient aerated grit chamber provided by the utility model, the submersible sand pump is arranged to treat the bottom of the first chamber body or the bottom of the second chamber body in sequence through the first sand suction pipe, so that sand grains and suspended settled sand at the bottom of the first chamber body or the bottom of the second chamber body are comprehensively sucked and removed; and the submersible sand pump is not prone to being blocked by large garbage blocks and excessive sand grains, meanwhile, small sand grains and suspended solids can be removed, and the sand removing efficiency, effect and stability can be improved. Meanwhile, scum is skimmed into the scum well through a scum discharging notch by a scum skimming plate of the skimming device, so that the scum on the water surface is effectively skimmed, the residence time of the scum on the surface of the tank is shortened, the influence of the scum on the water quality is reduced, the scum on the surface of the tank body and settled sand at the bottom of the tank body are quickly collected and intensively treated, and the service life of the tank body is prolonged. The water quality of the water body is improved, and the aeration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a high-efficiency aeration grit chamber. Background Art

[0002] As a crucial component of sewage treatment systems, aerated grit chambers primarily remove inorganic impurities such as sand and suspended matter from wastewater to protect the normal operation of subsequent treatment facilities. Traditional grit removal methods often utilize a combination of scrapers and air lift pumps. The scrapers scrape settled sand to one side of the chamber, where it is then sucked out by a suction pump and discharged, completing the grit removal process.

[0003] However, while scrapers can scrape up sand deposited at the bottom of the grit chamber, they are less effective at removing smaller sand particles and suspended solids, which can easily lead to their accumulation and reduce aeration efficiency. Furthermore, airlift pumps are susceptible to clogging due to large pieces of debris and excessive sand during the sand removal process, causing wear or even blockage. This not only affects sand removal efficiency but also increases maintenance costs and downtime.

[0004] Therefore, it is necessary to transform the existing grit chamber and provide an aerated grit chamber with good sand and suspended solids removal effect and high sand removal efficiency. Utility Model Content

[0005] Aiming at the technical problem that in the prior art, when a sand scraper and an air lift pump are used to remove sand in a sand settling tank, the removal effect of sand particles and suspended matter is poor and the sand removal efficiency is low, the utility model provides a high-efficiency aerated sand settling tank.

[0006] A high-efficiency aerated grit chamber, comprising a water inlet area, a grit chamber and a water outlet area connected in sequence; the grit chamber comprises a first tank body and a second tank body; a liquid level gauge for detecting the liquid level is provided in each of the first tank body and the second tank body; a track is provided on both sides of the first tank body and the second tank body perpendicular to the flow direction of water, a sand scraping bridge is slidably provided on the track; the sand scraping bridge is provided with a skimming device and a sand suction assembly in sequence along the length direction of the sand scraping bridge; the skimming device comprises a liftable connecting rod fixedly mounted on the sand scraping bridge and a skimming plate located below the sand scraping bridge, and the skimming plate is rotatably connected to the liftable connecting rod; the sand suction assembly comprises a hanger, a submersible A water sand pump, a first sand suction pipe and a first sand discharge pipe; the hanger is fixedly arranged under the sand scraping bridge; the submersible sand pump is fixed on the hanger; the first sand suction pipe and the first sand discharge pipe are respectively connected to the sand inlet and sand outlet of the submersible sand pump; a sand discharge trough is provided between the first pool body and the second pool body, the sand discharge trough is horizontally arranged along the water flow direction, and the sand discharge outlet of the first sand discharge pipe is located directly above the sand discharge trough; a slag well is provided on the side of the first pool body and the second pool body away from the water inlet area, and the top of the first pool body and the second pool body are connected to the corresponding slag well through a slag discharge notch, and the skimming plate will skim the slag into the slag well through the slag discharge notch.

[0007] Furthermore, it also includes a sand-water separator, and the sand discharge trough is connected to the sand-water separator through a second sand discharge pipe.

[0008] Furthermore, each of the slag discharge notches is provided with a sealing plate for closing the slag discharge notch, and the slag discharge notch includes a first slag discharge port and a second slag discharge port located directly above the first slag discharge port.

[0009] Furthermore, a plurality of air pipes are installed at the bottom of the first tank body and the second tank body, and the air pipes include a first air branch pipe, a second air branch pipe and a perforated aeration pipe, and one end of each first air branch pipe is connected to the perforated aeration pipe, and the other end is connected to the second air branch pipe, and the second air branch pipe is connected to a blower room.

[0010] Furthermore, the water inlet area includes a water collecting tank body, a filter tank body and a drainage tank body. The water collecting tank body, filter tank body and drainage tank body are connected in sequence through a first gate, and the water level of each tank is adjusted by controlling the opening of the first gate; a water inlet pipe is provided at the bottom of the water collecting tank body, a rotary fine screen machine is provided in the filter tank body, and the drainage tank body is connected to the first tank body and the second tank body respectively through a second gate.

[0011] Furthermore, the water outlet area includes a third pool body connected to the first pool body and the second pool body, the third pool body is provided with an overflow pipe and a drain pipe connected to the outside, and a third gate is provided between the drain pipe and the third pool body.

[0012] Furthermore, the first pool body and the second pool body each include a pool bottom and a pool wall respectively arranged on both sides of the pool bottom along the water flow direction, and a slope is provided at the connection between the pool body and the pool wall; and a sand collecting trough is provided at one end of the pool bottom near the water outlet area, the pool bottom is inclined downward along the direction close to the sand collecting trough, and the sand collecting trough includes a trough bottom and several side walls connecting the pool bottom and the trough bottom, and the side walls are arranged at an incline.

[0013] Furthermore, an air lift pump is respectively provided above the first pool body and the second pool body, and the air lift pump includes a gas inlet, a gas outlet and a liquid outlet. The gas outlet is connected to a second sand suction pipe, and the other end of the second sand suction pipe is movably inserted into the sand collecting trough, and the liquid outlet is connected to the sand discharge trough through a third sand discharge pipe.

[0014] Furthermore, one side of each of the first and second pool bodies is provided with an emptying well for emptying the pool body, one end of the emptying well is connected to the pool bottom, and the other end is provided with an emptying pipe for external discharge.

[0015] Furthermore, the top covers of the first tank body and the second tank body are provided with a sealing cover.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a high-efficiency aerated grit chamber, which, by providing a submersible sand pump to sequentially process the bottom of the first tank body or the second tank body through the first sand suction pipe, achieves comprehensive suction and removal of sand particles and suspended sand at the bottom of the first tank body or the second tank body, and the submersible sand pump is not easily clogged by large pieces of garbage and excessive sand particles, while being able to remove smaller sand particles and suspended matter, thereby facilitating improved sand removal efficiency, effect, and stability. Simultaneously, the skimming plate of the provided skimming device skims scum into the scum well through the scum discharge notch, effectively skimming scum on the water surface, reducing the scum's retention time on the tank surface, and reducing the impact of the scum on the water quality, thereby achieving rapid collection and centralized treatment of scum on the tank body surface and sand at the tank bottom, improving the water quality of the water body, and facilitating improved aeration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a structural schematic diagram of a high-efficiency aerated grit chamber.

[0018] Figure 2 for Figure 1 AA cross-sectional structural diagram;

[0019] Figure 3 for Figure 2 Schematic diagram of the BB cross-section structure.

[0020] Figure ID

[0021] 1. Water inlet area; 2. Sand settling area; 21. First tank body; 211. Tank body; 212. Tank wall; 213. Slope; 214. Sand collecting trough; 22. Second tank body; 23. Sand scraping bridge; 24. Slag skimming device; 25. Sand suction assembly; 26. Hanger; 27. Submersible sand pump; 28. First sand discharge pipe; 3. Water outlet area; 31. Third tank body; 32. Overflow pipe; 33. Drain pipe; 34. Third gate; 4. Sand discharge trough; 5. Scum well; 6. Scum discharge slot; 7. First air branch pipe; 8. Second air branch pipe; 9. Perforated aeration pipe; 10. Air lift pump; 11. Second sand suction pipe; 12. Third sand discharge pipe; 13. Sand-water separator; 14. Second sand discharge pipe; 15. Drain well; 16. Drain pipe; 17. Sealing cover. DETAILED DESCRIPTION

[0022] To further illustrate the present invention, the following description is provided with reference to the accompanying drawings. It should be noted that the embodiments described below represent only a portion of the present invention, and not all of its embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0023] refer to Figure 1 As shown, a high-efficiency aerated grit chamber comprises an inlet area 1, a grit area 2 and an outlet area 3 which are connected in sequence.

[0024] Specifically, refer to Figure 1 and Figure 2 As shown, the water inlet area 1 includes a water collecting tank body 101, a filter tank body 102 and a drainage tank body 103. The water collecting tank body 101, the filter tank body 102 and the drainage tank body 103 are connected in sequence through a first gate 104, and the water level of each tank is adjusted by controlling the opening of the first gate 104; a water inlet pipe 105 is provided at the bottom of the water collecting tank body 31, a rotary fine screen machine 106 is provided in the filter tank body 102, and the drainage tank body 103 is connected to the sand settling area 2 through a second gate 107.

[0025] By adjusting the opening of the first gate 104, the water level in each tank is regulated, thereby adjusting the water flow rate of the water inlet pipe 35. In conjunction with the opening of the second gate 107, the water flow rate entering the grit settling area 2 is adjusted. An appropriate water flow rate facilitates the sedimentation and removal of particles in the grit settling area 2. Adjusting the water flow rate helps optimize the treatment effect of the grit settling tank and improve treatment efficiency.

[0026] The rotary fine screen machine 106 includes a conveyor belt with a plurality of bars and a motor for driving the conveyor belt. The motor drives the conveyor belt to rotate, thereby filtering and conveying fixed impurities in the filter tank 32, reducing the impurity load required for subsequent treatment in the sand settling area 2 and making the treatment process easier.

[0027] refer to Figure 1 and Figure 3 As shown, the sand settling area 2 comprises a first tank body 21 and a second tank body 22; a drainage tank body 33 is connected to the first tank body 21 and the second tank body 22, respectively. Each of the first tank body 21 and the second tank body 22 is equipped with a level gauge (not shown) for detecting the liquid level. The level gauges provide timely information on changes in the internal liquid levels of the first and second tank bodies 21, 22, thereby controlling the amount of water flowing in and out, the flow rate, and the opening and closing of certain slots based on the liquid level.

[0028] A track (not shown in the figure) is provided on both sides of the first pool body 21 and the second pool body 22 perpendicular to the water flow direction, and a sand scraping bridge 23 is slidably provided on the track; the sand scraping bridge 23 is provided with a skimming device 24 and a sand suction component 25 in sequence along the length direction of the sand scraping bridge 23.

[0029] The driving mechanism drives the sand scraping bridge 23 to move along the water flow on the track, so that the skimming device 24 skims the oil residue on the water surface, and the sand suction component 25 absorbs and removes sand and other heavier suspended particles in the water, completing the sand removal and skimming treatment of the incoming water.

[0030] The slag skimming devices 24 each include a liftable connecting rod 241 fixedly mounted on the sand scraping bridge 23 and a slag skimming plate 242 located below the sand scraping bridge 23 , and the slag skimming plate 242 is rotatably connected to the liftable connecting rod 241 .

[0031] A scum well 5 is provided on the side of each of the first and second tank bodies 21 and 22 away from the water inlet area 1, and the tops of the first and second tank bodies 21 and 22 are connected to the corresponding scum well 5 via a scum discharge notch 6. The scum skimmer 242 skims scum into the scum well 5 through the scum discharge notch 6. The scum skimmer 242 follows the sand scraping bridge 23 as it moves along the water flow direction, continuously operating to skim oily residue and scum on the water surface toward the side closer to the scum well 5, and finally skims the scum into the scum well 5 through the scum discharge notch 6. This effectively removes scum and oily residue from the water surface, preventing them from accumulating in the water and deteriorating water quality. This allows for the rapid collection and centralized treatment of scum and oily residue, improving the efficiency of scum and oily residue treatment.

[0032] Preferably, the liftable connecting rod 241 includes a telescopic sleeve and a telescopic rod. The telescopic sleeve is fixedly connected to the sand scraping bridge 23. One end of the telescopic rod is slidably connected to the telescopic sleeve, and the other end is rotatably connected to the skimming plate 242. The drive mechanism drives the telescopic rod to extend and retract within the telescopic sleeve, thereby adjusting the length of the liftable connecting rod 241 and the height of the skimming plate 242 to adapt to various tank liquid levels.

[0033] Each of the slag discharge notches 6 is provided with a sealing plate (not shown) for closing the notch 4. The notches 6 include a first slag discharge port and a second slag discharge port located directly above the first slag discharge port. The first and second slag discharge ports are positioned at different heights to accommodate skimming operations at varying tank liquid levels into the slag well 5. In this embodiment, after obtaining the tank liquid level using a liquid level gauge, the sealing plate of the first or second slag discharge port corresponding to the corresponding liquid level is opened, and the length of the elevating connecting rod 241 is then adjusted to adjust the skimming plate 242 to a height that matches the liquid level and the slag discharge port.

[0034] The sand suction assembly 25 includes a hanger 26, a submersible sand pump 27, a first sand suction pipe (not shown in the figure) and a first sand discharge pipe 28; the hanger 26 is fixedly arranged below the sand scraping bridge 23; the submersible sand pump 27 is fixed on the hanger 26; the first sand suction pipe and the first sand discharge pipe 28 are respectively connected to the sand inlet and sand outlet of the submersible sand pump 27; a sand discharge trough 4 is provided between the first pool body 21 and the second pool body 22.

[0035] The sand scraping bridge 23 moves along the track, thereby driving the first sand suction pipe, the first sand discharge pipe 28, and the submersible sand pump 27 on the hanger 26 to move along with the hanger 26, so that the submersible sand pump 27 can process the bottom of the first pool body 21 or the second pool body 22 in sequence through the first sand suction pipe, thereby achieving comprehensive absorption of the settled sand at the bottom of the first pool body 21 or the second pool body 22 and discharging it into the sand discharge trough 4.

[0036] The submersible sand pump 27 has a powerful suction capacity, allowing it to quickly remove sand and suspended matter from the first and second tank bodies 21, 22. This is particularly effective for removing smaller sand and suspended matter, thereby improving sand removal efficiency and effectiveness. Furthermore, the submersible sand pump 27 is less susceptible to clogging by large pieces of trash and excessive sand during operation, ensuring stable sand removal efficiency. This also reduces the concentration of suspended matter within the tanks, thereby improving aeration efficiency. Furthermore, since the submersible sand pump 27 does not require an additional compressed air supply, it also reduces malfunctions caused by air pump blockage and other issues.

[0037] By setting up the sand suction component 2525 and the skimming device 24, the scum and sand in the first tank body 21 and the second tank body 22 are effectively removed, ensuring that the water quality in the tank body is in a good state, reducing the concentration of the suspended liquid in the tank body, making it easier for oxygen to be distributed in the sewage, and improving the aeration efficiency.

[0038] The sand discharge trough 4 is horizontally arranged along the water flow direction, and the sand discharge port of the first sand discharge pipe 28 is located directly above the sand discharge trough 4, so that the sand discharge port of the first sand discharge pipe 28 is always located directly above the sand discharge trough during the movement, thereby improving the accuracy of sand discharge.

[0039] refer to Figure 1 and Figure 2 As shown, a high-efficiency aerated grit chamber further includes a sand-water separator 13. The sand discharge trough 4 is connected to the sand-water separator 13 via a second sand discharge pipe 14. The water-containing sand in the first and second tank bodies 21 and 22 is sucked out and discharged into the sand discharge trough 4. The sucked water-containing sand is then fed into the sand-water separator 13 via the second sand discharge pipe 14 for sand-water separation. This effectively filters out sand and other impurities in the water, including silt and suspended matter. The separated water is then directed to a pump station to prevent sand from accumulating in the sand discharge trough 4 and causing blockage or malfunction, thereby ensuring the normal operation of the grit chamber, improving grit settling efficiency, and optimizing water quality treatment.

[0040] Several air pipes (not shown in the figure) are installed at the bottom of the first tank body 21 and the second tank body 22. The air pipes include a first air branch pipe 7, a second air branch pipe 8 and a perforated aeration pipe 9. One end of each first air branch pipe 7 is connected to the perforated aeration pipe 9, and the other end is connected to the second air branch pipe 8. The second air branch pipe 8 is connected to a blower room (not shown in the figure).

[0041] The water outlet area 3 includes a third pool body 31 connected to the first pool body 21 and the second pool body 22. The third pool body 31 is provided with an overflow pipe 32 and a drain pipe 33 connected to the outside. A third gate 34 is provided between the drain pipe 33 and the third pool body 31.

[0042] The first and second pool bodies 21 and 22 each include a pool bottom 211 and pool walls 212 disposed on either side of the pool bottom 211 along the direction of water flow. A slope 213 is provided at the junction of the pool body 211 and the pool walls 212. The slope 213 facilitates the sedimentation of sand and gravel toward the pool bottom 211, thereby improving sedimentation efficiency.

[0043] The pool bottom 211 is provided with a sand collecting trough 214 at one end near the water outlet area 3. The pool bottom 211 is tilted downward in the direction close to the sand collecting trough 214, and the sand collecting trough 214 includes a trough bottom and a plurality of side walls connecting the pool bottom 211 and the trough bottom, and the side walls are tilted. The sand collecting trough 214 is close to the water outlet area 3 and is located at the end of the water flow direction in the pool body. The sand and gravel in the water flow gradually settles following the flow direction. Since the pool bottom 211 is tilted downward in the direction close to the sand collecting trough 214, the settled sand and gravel particles will gradually accumulate toward the sand collecting trough 214 under the action of the water flow, and are more concentratedly distributed in the sand collecting trough 214 area. The sand suction component 25 can be directly moved to the top of the sand collecting trough 214 to suck sand, which is beneficial to reduce the number of sand suction times and improve the sand suction efficiency, and is convenient for subsequent cleaning and transportation.

[0044] Preferably, an air lift pump 10 is provided above each of the first pool body 21 and the second pool body 22. The air lift pump 10 includes a gas inlet, a gas outlet and a liquid outlet. The gas outlet is connected to a second sand suction pipe 11, and the other end of the second sand suction pipe 11 is movably inserted into the sand collecting trough 214. The liquid outlet is connected to the sand discharge trough 4 through a third sand discharge pipe 12. After the existing sand settling tank is modified, the air lift pump 1 is retained for emergency use. The air lift pump 1 can be used to extract the sand and gravel accumulated in the sand collecting trough 214 through the third sand discharge pipe 12 and discharge it into the sand discharge trough 4. When there is a lot of sand, it assists the sand suction component 25 to complete the sand suction operation of the pool bottom 211, or sucks sand when the sand suction component 25 cannot be used to complete the processing of sand and gravel in the sand collecting trough 214.

[0045] refer to Figure 3 As shown, each of the first and second tank bodies 21, 22 is provided with a drain well 15 on one side for draining the tanks. One end of the drain well 15 is connected to the tank bottom, and the other end is provided with a drain pipe 16 for external drainage. The provision of drain well 15 and drain pipe 16 simplifies and facilitates cleaning the grit chamber. Operators can remove sediment and impurities from the tanks through drain pipe 16, eliminating the need to enter the tanks for cleaning, thus reducing the difficulty and risk of cleaning.

[0046] The top cover of the first tank body 21 and the second tank body 22 is provided with a sealing cover 17. The sealing cover 17 can provide a relatively closed treatment environment, reducing the influence of external factors on the treatment effect of the grit chamber.

[0047] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention and are not intended to limit the present invention to the specific embodiments described. Obviously, other modifications and variations may be made based on the contents of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. They are not intended to limit the present invention, and any simple variations of the present invention fall within the scope of protection of the present invention.

Claims

1. A high-efficiency aerated grit chamber, characterized in that: It includes a water inlet area, a sand settling area and a water outlet area which are connected in sequence; The sand settling area includes a first tank body and a second tank body; a liquid level gauge for detecting the liquid level is provided in each of the first tank body and the second tank body; a track is provided on both sides of the first tank body and the second tank body perpendicular to the water flow direction, and a sand scraping bridge is slidably provided on the track; the sand scraping bridge is provided with a skimming device and a sand suction assembly in sequence along the length direction of the sand scraping bridge; The skimming device includes a liftable connecting rod fixedly mounted on the sand scraping bridge and a skimming plate located below the sand scraping bridge, and the skimming plate is rotatably connected to the liftable connecting rod; The sand suction assembly includes a hanger, a submersible sand pump, a first sand suction pipe and a first sand discharge pipe; the hanger is fixedly arranged below the sand scraping bridge; the submersible sand pump is fixed on the hanger; the first sand suction pipe and the first sand discharge pipe are respectively connected to the sand inlet and the sand outlet of the submersible sand pump; A sand discharge trough is provided between the first pool body and the second pool body. The sand discharge trough is arranged horizontally along the water flow direction, and the sand discharge port of the first sand discharge pipe is located directly above the sand discharge trough; A scum well is provided on the side of the first pool body and the second pool body away from the water inlet area, and the tops of the first pool body and the second pool body are connected to the corresponding scum well through a scum discharge slot, and the skimming plate will skim the scum into the scum well through the scum discharge slot.

2. A high-efficiency aerated grit chamber according to claim 1, characterized in that: It also includes a sand-water separator, and the sand discharge trough is connected to the sand-water separator through a second sand discharge pipe.

3. A high-efficiency aerated grit chamber according to claim 1, characterized in that: Each of the slag discharge slots is provided with a sealing plate for closing the slag discharge slot, and the slag discharge slot includes a first slag discharge slot and a second slag discharge slot located directly above the first slag discharge slot.

4. A high-efficiency aerated grit chamber according to claim 1, characterized in that: Several air pipes are installed at the bottom of the first tank body and the second tank body. The air pipes include a first air branch pipe, a second air branch pipe and a perforated aeration pipe. One end of each first air branch pipe is connected to the perforated aeration pipe, and the other end is connected to the second air branch pipe. The second air branch pipe is connected to a blower room.

5. The high-efficiency aerated grit chamber according to claim 1, characterized in that: The water inlet area includes a water collecting tank body, a filter tank body and a drainage tank body. The water collecting tank body, the filter tank body and the drainage tank body are connected in sequence through a first gate, and the water level of each tank is adjusted by controlling the opening of the first gate; a water inlet pipe is provided at the bottom of the water collecting tank body, a rotary fine screen machine is provided in the filter tank body, and the drainage tank body is connected to the first tank body and the second tank body respectively through a second gate.

6. The high-efficiency aerated grit chamber according to claim 1, characterized in that: The water outlet area includes a third pool body connected to the first pool body and the second pool body. The third pool body is provided with an overflow pipe and a drain pipe connected to the outside world. A third gate is provided between the drain pipe and the third pool body.

7. The high-efficiency aerated grit chamber according to claim 1, characterized in that: The first pool body and the second pool body each include a pool bottom and a pool wall respectively arranged on both sides of the pool bottom along the water flow direction, and a slope is provided at the connection between the pool body and the pool wall; and a sand collecting trough is provided at one end of the pool bottom near the water outlet area, and the pool bottom is inclined downward along the direction close to the sand collecting trough, and the sand collecting trough includes a trough bottom and several side walls connecting the pool bottom and the trough bottom, and the side walls are arranged at an incline.

8. The high-efficiency aerated grit chamber according to claim 1, characterized in that: An air lift pump is respectively provided above the first pool body and the second pool body. The air lift pump includes a gas inlet, a gas outlet and a liquid outlet. The gas outlet is connected to a second sand suction pipe, and the other end of the second sand suction pipe is movably inserted into the sand collecting trough. The liquid outlet is connected to the sand discharge trough through a third sand discharge pipe.

9. The high-efficiency aerated grit chamber according to claim 1, characterized in that: One side of each of the first and second tank bodies is provided with an emptying well for emptying the tank body, one end of the emptying well is connected to the tank bottom, and the other end is provided with an emptying pipe for external discharge.

10. The high-efficiency aerated grit chamber according to claim 1, characterized in that: The top covers of the first tank body and the second tank body are provided with a sealing cover.

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