Defoaming equipment for aeration tank

Abstract

The defoaming equipment for the aeration tank comprises the aeration tank and a cover body, a bubble suction assembly and a defoaming mechanism are arranged on the cover body, the bubble suction assembly comprises a bubble suction pipeline, a plurality of bubble suction openings and a gathering cover, and the gathering cover is attached to the upper surface of the aeration tank; the defoaming mechanism comprises a defoaming pipeline, a plurality of water distributor nozzles are distributed on the defoaming pipeline, and the defoaming pipeline is movably connected between the inner wall of the cover body and the adjusting assembly; a defoaming box is arranged on the upper surface of the cover body, one side of the defoaming box is connected with a foam pumping machine and a foam pumping hose, and the foam pumping hose is communicated with the foam suction pipeline and the defoaming box; the other side of the defoaming box is connected with a high-pressure pump and a defoaming hose, and the defoaming hose is communicated with the defoaming pipeline and the defoaming box. Foam in the foam suction pipeline is sucked into the defoaming box through the foam suction machine for preliminary defoaming, water subjected to preliminary defoaming is injected into the defoaming mechanism through the high-pressure pump at high pressure, the bubbles are eliminated in a spraying mode of the multiple water distributor nozzles, parts of the defoaming equipment are convenient to disassemble, maintain and replace, and maintenance work is more facilitated.

Description

Technical Field

[0001] This utility model is specifically a defoaming device for aeration tanks. Background Technology

[0002] A typical urban domestic sewage biological treatment process includes: screen, grit chamber, primary sedimentation tank, biological treatment section, secondary sedimentation tank, and disinfection. The biological treatment section includes an aeration tank. Integrated sewage treatment equipment combines conventional treatment structures, featuring small footprint and simple control. Sewage with high oil and surfactant content generates a large amount of chemical foam upon entering the aeration tank. The generation and accumulation of large amounts of foam on the surface of the aeration tank can easily be blown away and overflow the tank in windy weather, causing secondary pollution. The foam accumulation and overflow also carries a large amount of activated sludge, causing sludge loss and a sharp decline in the treatment efficiency of the aeration tank. Adding chemical defoamers is costly, and excessive addition can affect the water quality parameters of downstream equipment and the overall water quality of the equipment. Moreover, the existing aeration tank defoaming equipment is complex to disassemble, repair, and replace parts, which is not conducive to maintenance work. Utility Model Content

[0003] In view of the above, this utility model provides an aeration tank defoaming device to solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: An aeration tank defoaming device is provided, including an aeration tank. A cover is fitted onto the top of the aeration tank, and an installation space is provided inside the cover. A bubble-absorbing component is provided on the side of the cover facing the interior of the aeration tank. The bubble-absorbing component includes a bubble-absorbing pipe and several bubble-absorbing ports for absorbing bubbles on the surface of the aeration tank. The bubble-absorbing pipe is horizontally positioned in the middle of the interior of the cover. The upper ends of the several bubble-absorbing ports are distributed on the bubble-absorbing pipe, and the lower ends of the bubble-absorbing ports are provided with funnel-shaped collecting hoods. The collecting hoods penetrate the bottom of the cover and are attached to the upper surface of the aeration tank. Defoaming mechanisms for spraying water into the aeration tank to eliminate foam are respectively provided on both sides of the interior of the cover. Each defoaming mechanism includes a defoaming pipe, and several bubble-absorbing ports are spaced apart along its axial direction. The blocked water distributor nozzle has an opening at the bottom of the cover for adjustment. One end of the defoaming pipe is movably connected to the inner wall of the cover, and the other end is connected to an adjustment component that uses a cylinder and connecting rod to periodically change its spray angle. A defoaming box is provided on the upper surface of the cover. A defoaming machine is connected to one side of the defoaming box to draw foam from the foam absorption pipe into the defoaming box. The inlet and outlet of the defoaming machine are connected to defoaming hoses, which connect the foam absorption pipe and the defoaming box. A high-pressure pump is connected to the other side of the defoaming box to inject high-pressure water from the defoaming box into the defoaming pipe. The inlet and outlet of the high-pressure pump are connected to defoaming hoses, which connect the defoaming pipe and the defoaming box. Filter cartridges for filtering solid impurities are provided at the connection points of the defoaming hoses.

[0005] Furthermore, a water level sensor is installed on the inner wall of the aeration tank to ensure that the water surface of the aeration tank is in contact with the lower opening of the collection hood.

[0006] Furthermore, several vertically distributed grid plates are fixed on the inner wall of the defoaming box, and several triangular through holes are opened on the grid plate.

[0007] Furthermore, the defoaming hose at the outlet end of the defoaming machine is connected to the upper end of the defoaming box.

[0008] Furthermore, the adjustment assembly includes a drive cylinder and an adjustment rod. One end of the adjustment rod is fixedly connected to the defoaming pipe, and the other end is hinged to the piston rod of the drive cylinder. The drive cylinder is mounted on a hinge seat, and the axis of the hinge seat is parallel to the axis of the defoaming pipe, so that the defoaming pipe can be rotated and supported on the inner wall of the cover.

[0009] Furthermore, the water distributor nozzle is a fan-shaped water distributor nozzle, and the water jet directions of the water distributor nozzles on both sides of the defoaming pipe are staggered, and the water jet directions are all directed towards the center of the aeration tank.

[0010] Furthermore, the cross-section of the opening is larger than the range of motion of the water distributor nozzle.

[0011] Furthermore, both the defoaming hose and the defoaming hose are equipped with check valves.

[0012] Furthermore, the upper and lower shells of the cover are detachably connected.

[0013] Furthermore, the bubble-absorbing component, defoaming mechanism, and defoaming box are all detachably installed inside or on the surface of the cover.

[0014] The wastewater aeration tank defoaming device of this utility model seals the top of the aeration tank with a cover, preventing a large amount of foam on the surface of the aeration tank from being blown away and overflowing the tank body under windy weather conditions, thus avoiding secondary pollution.

[0015] By installing a foam-absorbing component, a defoaming mechanism, and a defoaming box inside or on the surface of the cover, and attaching the collection hood at the lower end of the foam-absorbing port to the upper surface of the aeration tank, the foam in the foam-absorbing pipe is pumped into the defoaming box by a foam pump for preliminary defoaming. The water after preliminary defoaming is then injected into the defoaming mechanism by a high-pressure pump, where solid impurities are filtered by a filter element, and then the bubbles are eliminated by spraying through several water distributor nozzles to avoid clogging of the water distributor nozzles. This device achieves defoaming using unpurified sewage, allowing a large number of aerobic microorganisms to re-enter the aeration tank, avoiding the loss of aerobic microorganisms, improving the sewage treatment efficiency, and eliminating the need to add chemical defoamers, thus reducing operating costs.

[0016] In addition, the foam absorption components, defoaming mechanism, and defoaming box are all detachably installed inside or on the surface of the cover. The upper and lower shells of the cover are detachably connected, which facilitates the disassembly, repair, and replacement of the defoaming equipment parts and makes maintenance work easier. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the assembly of the aeration tank and its cover.

[0019] Figure 3 This is a schematic diagram of the detachable connection between the upper and lower shells of the cover.

[0020] Figure 4 This is a cross-sectional view of the defoaming box.

[0021] Figure 5 This is an assembly diagram showing the drive cylinder being fixedly connected to the defoaming pipe via an adjusting rod.

[0022] Figure 6 It is a force analysis diagram of the driving cylinder driving the defoaming pipe to make periodic forward and reverse rotation.

[0023] In the diagram, 1. Aeration tank; 101. Water level sensor; 2. Cover; 201. Lower shell; 202. Upper shell; 3. Defoaming pipe; 4. Water distributor nozzle; 401. Opening; 5. Adjustment component; 501. Adjustment rod; 502. Drive cylinder; 503. Hinge seat; 6. Foam suction pipe; 7. Foam suction port; 701. Gathering hood; 8. Defoaming box; 801. Grid plate; 9. Defoaming hose; 10. High-pressure pump; 11. Foam extraction hose; 12. Foam extraction machine; 13. Check valve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and some embodiments.

[0025] exist Figures 1-6 A defoaming device for an aeration tank is provided, comprising an aeration tank 1. A cover 2 is movably mounted on the top of the aeration tank 1 by bolts. An installation space is provided inside the cover 2. A bubble-absorbing component is provided on the side of the cover 2 facing the interior of the aeration tank 1. The bubble-absorbing component includes a bubble-absorbing pipe 6 and several bubble-absorbing ports 7 for absorbing bubbles on the surface of the aeration tank 1. The bubble-absorbing pipe 6 is horizontally positioned in the middle of the interior of the cover 2. The upper ends of the several bubble-absorbing ports 7 are distributed on the bubble-absorbing pipe 6, and the lower ends of the bubble-absorbing ports 7 are provided with a funnel-shaped gathering cover 701. The gathering cover 701 penetrates the bottom of the cover 2 and is attached to the upper surface of the aeration tank 1. The upper surface of the cover 2 is provided with a defoaming box 8. A defoaming machine 12 is connected to one side of the defoaming box 8 to draw foam from the foam suction pipe 6 into the defoaming box 8. The inlet and outlet ends of the defoaming machine 12 are respectively connected to a defoaming hose 11, which connects the foam suction pipe 6 and the defoaming box 8. In use, the cover 2 is sealed on the top of the aeration tank 1 to prevent a large amount of foam from overflowing from the surface of the aeration tank 1 and causing secondary pollution. At the same time, the gathering cover 701 at the lower end of the foam suction port 7 is attached to the surface of the aeration tank 1. Through the suction of the defoaming machine 12, a large amount of foam on the surface of the aeration tank 1 is drawn into the defoaming box 8 through the foam suction pipe 6 and the defoaming hose 11 for preliminary defoaming.

[0026] In this embodiment, defoaming mechanisms are respectively provided on both sides of the inside of the cover 2 to spray water into the aeration tank 1 to eliminate foam in the aeration tank 1. The defoaming mechanism includes a defoaming pipe 3, and several non-clogging water distributor nozzles 4 are distributed along the axial direction of the defoaming pipe 3. An opening 401 is provided at the bottom of the cover 2 for the water distributor nozzles 4 to be adjusted. One end of the defoaming pipe 3 is movably connected to the inner wall of the cover 2, and the other end of the defoaming pipe 3 is connected to an adjustment component 5 that drives its spray angle to change periodically through the cooperation of a cylinder and a connecting rod. On the other side of the defoaming tank 8, a high-pressure pump 10 is connected to inject high-pressure water from the defoaming tank 8 into the defoaming pipe 3. The inlet and outlet ends of the high-pressure pump 10 are respectively connected to defoaming hoses 9. The flexible hose 9 connects the defoaming pipe 3 and the defoaming tank 8, and filter cartridges for filtering solid impurities are installed at the connection points of the defoaming hose 9. The water in the aeration tank 1, which undergoes preliminary defoaming through the bubble absorption component, is stored in the defoaming tank 8. Then, the high-pressure pump 10 injects the tank water into the defoaming hose 9 and the defoaming pipe 3 under high pressure. During the injection process, the filter cartridges filter solid impurities to prevent the water distributor nozzles from clogging. Finally, the high-pressure spray from several water distributor nozzles 4 is applied to the surface of the tank to apply pressure and break the bubbles, thereby removing the bubbles in a timely manner. This device achieves defoaming using unpurified sewage, allowing a large number of aerobic microorganisms to re-enter the aeration tank 1, preventing the loss of aerobic microorganisms, improving the sewage treatment efficiency, and eliminating the need to add chemical defoamers, thus reducing operating costs.

[0027] In this embodiment, a water level sensor 101 is installed on the inner wall of the aeration tank 1 to make the water surface of the aeration tank 1 fit with the lower opening 401 of the collecting hood 701. The water level sensor 101 adjusts the water level in the aeration tank 1 so that the water surface of the aeration tank 1 fits with the lower opening 401 of the collecting hood 701. Through the suction of the foam extractor 12, a large amount of foam on the surface of the aeration tank 1 is better drawn into the defoaming box 8 through the foam suction pipe 6 and the foam extraction hose 11 for preliminary defoaming.

[0028] In this embodiment, the defoaming hose 11 at the outlet end of the defoaming machine 12 is connected to the upper end of the defoaming box 8; a number of vertically distributed grid plates 801 are fixed on the inner wall of the defoaming box 8, and a number of triangular through holes are opened on the grid plate 801; by the suction of the defoaming machine 12, a large amount of foam on the surface of the aeration tank 1 is drawn into the defoaming box 8 through the defoaming pipe 6 and the defoaming hose 11, and is initially defoamed through the triangular through holes on the grid plate 801.

[0029] In this embodiment, the adjustment component 5 includes a drive cylinder 502 and an adjustment rod 501. One end of the adjustment rod 501 is fixedly connected to the defoaming pipe 3, and the other end is hinged to the piston rod of the drive cylinder 502. The drive cylinder 502 is mounted on a hinge seat 503, and the axis of the hinge seat 503 is parallel to the axis of the defoaming pipe 3, so that the defoaming pipe 3 is rotatably supported on the inner wall of the cover 2. The piston rod of the drive cylinder 502 performs reciprocating extension and retraction movements, which drives the adjustment rod 501 to perform corresponding reciprocating swings, thereby causing the adjustment rod 501 to correspondingly drive the defoaming pipe 3 to perform periodic forward and reverse rotation movements, so that the spray angle of the water distributor nozzle 4 on the defoaming pipe 3 will continuously change, cleaning the bubbles on the entire pool surface and ensuring the cleaning effect of the defoaming mechanism.

[0030] In this embodiment, the water distributor nozzle 4 is a fan-shaped water distributor nozzle. The water jet directions of the water distributor nozzles 4 on both sides of the defoaming pipe 3 are staggered, and the water jet directions are all directed towards the center of the aeration tank 1. By setting the water distributor nozzle 4 of the defoaming mechanism as a fan-shaped water distributor nozzle 4, the high-pressure spray covers a larger area after being sprayed from the water distributor nozzle 4, thereby enabling the high-pressure spray to contact the bubbles more quickly and comprehensively, improving the defoaming efficiency. In addition, the fan-shaped water distributor nozzle can form a fan-shaped water flow, covering a larger area, thereby reducing the possibility of blockage. The internal design of the nozzle should ensure uniform water flow distribution and reduce the risk of blockage.

[0031] In this embodiment, the cross-section of the opening 401 is larger than the range of motion of the water distributor nozzle 4; this facilitates the water distributor nozzle 4 on the defoaming pipe 3 to change the spray angle between the openings 401.

[0032] In this embodiment, both the defoaming hose 11 and the defoaming hose 9 are equipped with check valves 13 to prevent water from flowing back into the defoaming hose 11 and the defoaming hose 9.

[0033] In this embodiment, the upper and lower shells 201 of the cover 2 are connected by screws; the bubble absorption component, the defoaming mechanism, and the defoaming box 8 are all installed inside or on the surface of the cover 2 by screws; this facilitates the disassembly, repair, and replacement of the defoaming equipment parts and makes maintenance work easier.

[0034] In this embodiment, the water level sensor 101 is a common water level detection device, such as the WH311 model or the HY1001 model water level detection device.

[0035] In this embodiment, the drive cylinder 502 is a common drive cylinder device, such as the MXQ12L-30C model or the RML / RMT25-Q-25 model drive cylinder device.

[0036] In this embodiment, the control circuit of this utility model is a common circuit in the field of circuits. The device of this utility model can be connected to an external power source through a power cord to provide power to the device. Those skilled in the art can implement it, so it will not be described in detail here.

[0037] In practical implementation, the cover 2 is sealed to the top of the aeration tank 1 to prevent a large amount of foam from overflowing from the surface of the aeration tank 1 and causing secondary pollution. Simultaneously, the water level sensor 101 adjusts the water level in the aeration tank 1 so that the water surface of the aeration tank 1 is in contact with the lower opening 401 of the collecting hood 701. Through the suction of the defoaming machine 12, a large amount of foam on the surface of the aeration tank 1 is drawn into the defoaming tank 8 through the suction pipe 6 and the defoaming hose 11, and then undergoes preliminary defoaming through the triangular through-holes on the grid plate 801. The water in the aeration tank 1 after preliminary defoaming is stored in the defoaming tank 8. Then, the high-pressure pump 10 injects the tank water under high pressure into the defoaming hose 9 and the defoaming pipe 3, driving the piston rod of the cylinder 502 to reciprocate, causing the adjusting rod 501 to swing accordingly. The adjusting rod 501 correspondingly drives the defoaming pipe 3 to perform periodic forward and reverse rotation, causing the spray angle of the water distributor nozzles 4 on the defoaming pipe 3 to continuously change. The high-pressure spray from several water distributor nozzles 4 onto the pool surface applies pressure to break the bubbles, cleaning the bubbles on the entire pool surface and ensuring the cleaning effect of the defoaming mechanism. This device uses unpurified sewage to achieve defoaming, allowing a large number of aerobic microorganisms to re-enter the aeration tank 1, avoiding the loss of aerobic microorganisms and improving the sewage treatment efficiency. Furthermore, the bubble suction component, defoaming mechanism, and defoaming box 8 are all installed inside or on the surface of the cover 2 by screw detachment. The upper and lower shells 201 of the cover 2 are connected by screw detachment, which facilitates the disassembly, maintenance, and replacement of defoaming equipment parts and makes maintenance work easier.

[0038] It is worth noting that in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] It will be apparent to those skilled in the art that this utility model patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be encompassed within this utility model patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An apparatus for defoaming an aerated tank, comprising an aerated tank, characterized in that: The top of the aeration tank is matched with a cover, an installation space is formed in the cover, a bubble suction assembly is arranged on the side of the cover facing the inside of the aeration tank, the bubble suction assembly comprises a bubble suction pipeline and a plurality of bubble suction ports for suctioning bubbles on the surface of the aeration tank, the bubble suction pipeline is horizontally arranged at the middle position of the inside of the cover, the upper ends of the plurality of bubble suction ports are arranged on the bubble suction pipeline, and the lower ends of the bubble suction ports are provided with horn-shaped collecting covers penetrating through the lower bottom of the cover and adhering to the upper surface of the aeration tank. A defoaming mechanism for spraying water flow into the aeration tank to eliminate foam in the aeration tank is arranged on both sides of the inside of the cover, the defoaming mechanism comprises a defoaming pipeline, a plurality of non-clogging water distributor nozzles are arranged on the defoaming pipeline at intervals along the axial direction, an opening for the water distributor nozzles to move and adjust is formed in the lower bottom of the cover, one end of the defoaming pipeline is movably connected to the inner wall of the cover, and the other end of the defoaming pipeline is connected to an adjusting assembly for periodically changing the spray angle. A defoaming box is arranged on the upper surface of the cover, one side of the defoaming box is connected to a bubble extraction machine for extracting bubbles in the bubble suction pipeline into the defoaming box, the inlet end and the outlet end of the bubble extraction machine are respectively connected to bubble extraction hoses, and the bubble extraction hoses are connected to the bubble suction pipeline and the defoaming box. The other side of the defoaming box is connected to a high-pressure pump for high-pressure injection of water in the defoaming box into the defoaming pipeline, the inlet end and the outlet end of the high-pressure pump are respectively connected to the bubble extraction hoses, the bubble extraction hoses are connected to the defoaming pipeline and the defoaming box, and filter cartridges for filtering solid impurities are arranged at the connection positions of the bubble extraction hoses.

2. The defoaming device for an aeration tank according to claim 1, characterized by: A water level sensor is arranged on the inner wall of the aeration tank, so that the water surface of the aeration tank is matched with the lower end opening of the collecting cover.

3. The defoaming device for an aeration tank according to claim 1, characterized by: A plurality of vertically distributed grid plates are fixed to the inner wall of the defoaming box, and a plurality of triangular through holes are formed in the plate bodies of the grid plates.

4. The device according to claim 3, characterized in that: The bubble extraction hose at the outlet end of the bubble extraction machine is connected to the upper end of the defoaming box.

5. The device for defoaming of an aerated tank according to claim 1, characterized in that: The adjusting assembly comprises a driving cylinder and an adjusting rod, one end of the adjusting rod is fixedly connected to the defoaming pipeline, the other end of the adjusting rod is hingedly connected to the piston rod of the driving cylinder, the driving cylinder is installed on a hinged seat, the axis of the hinged seat is parallel to the axis of the defoaming pipeline, and the defoaming pipeline is rotatably supported on the inner wall of the cover.

6. The device for defoaming of an aerated tank according to claim 1, characterized in that: The water distributor nozzles are fan-shaped water distributor nozzles, the water flow spray directions of the water distributor nozzles on the two defoaming pipelines are staggered with each other, and the water flow spray directions are both towards the middle part of the aeration tank.

7. An aerator defoaming device according to claim 6, characterised in that: The cross section of the opening is larger than the movable range of the water distributor nozzles.

8. The device according to claim 1, characterized in that: Check valves are arranged on the bubble extraction hoses and the defoaming hoses.

9. The device according to claim 1, characterized in that: The upper and lower shells of the cover are detachably connected.

10. An aerator defoaming device according to claim 9, characterized in that: The bubble suction assembly, the defoaming mechanism and the defoaming box are detachably installed in the inside or on the surface of the cover.

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