Floating type aeration stirring device

Abstract

The utility model discloses a floating type aeration stirring device which is arranged in a sewage reaction tank and comprises an aeration system, a floating system and a plug flow stirring system, and the floating system is connected with the aeration system and the plug flow stirring system through a connecting device; the plug-flow stirring system comprises a submersible plug-flow device, a guide cylinder and a plurality of guide water distribution pipes; the submersible plug-flow device sucks an upper-layer medium of the reaction tank and uniformly guides the upper-layer medium to a lower layer of the reaction tank through the guide cylinder and the guide water distribution pipes; the aeration system comprises an aeration fan, a static pressure box and an aerator, the aeration fan is communicated and connected with the static pressure box, and the aerator is arranged in the flow guide water distribution pipe and is communicated with the static pressure box. According to the floating type aeration stirring device provided by the utility model, the construction difficulty of cleaning a sewage pool can be reduced, the construction period is shortened, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment devices, in particular to a floating aeration stirring device. Background Art

[0002] Biological treatment of sewage is a general term for treating sewage by biological methods. It is one of the most widely used methods in modern sewage treatment. It is a measure or technology that uses the ability of certain organisms to absorb and degrade pollutants to purify sewage. It mainly uses the decomposition of microorganisms to convert organic matter in sewage into simple inorganic matter, so that sewage can be purified. According to the demand for oxygen, it can be divided into two categories: anaerobic biological treatment and aerobic biological treatment. The anaerobic biological treatment system uses anaerobic organisms to convert organic matter into organic acids, and methanogens decompose organic acids into methane, carbon dioxide and hydrogen, such as anaerobic ponds, septic tanks, anaerobic digestion of sludge and anaerobic bioreactors. Aerobic biological treatment uses mechanical aeration or natural aeration (such as algae photosynthesis oxygen production, etc.) to provide active energy for aerobic microorganisms in sewage, promote the decomposition activity of aerobic microorganisms, and purify sewage, such as activated sludge, biological filter, biological rotary disc, sewage irrigation, and oxidation ponds. Among them, the most widely used is the aerated biochemical pool, which uses the aeration system laid at the bottom of the pool to aerate the water to provide microorganisms with enough oxygen and use the decomposition of microorganisms to remove pollutants in the water.

[0003] On the basis of traditional biological treatment processes, in order to increase the concentration of microorganisms, reduce the size of reactors and improve the efficiency of reactors, a variety of biofilm wastewater treatment processes have been derived. Moving bed biofilm reactor (MBBR) is one of them. The MBBR process is to add a certain amount of suspended carriers to the reactor. The carriers move freely with the water flow in the reactor, allowing microorganisms to attach to them, thereby increasing the biomass and biological species in the reactor, thereby improving the treatment efficiency of the reactor. In aerobic MBBR reactors, aeration is used to drive the carrier to move; in anoxic / anaerobic MBBR reactors, mechanical stirring is used to move the carrier. In the widely used aerobic MBBR reactor, aeration is carried out at the bottom of the pool through perforated aeration pipes to circulate the filler in the pool. Some reactors are equipped with submersible mixers at the bottom of the pool, and some reactors have both methods.

[0004] Whether it is an ordinary aerobic reactor or an aerobic moving bed biofilm reactor, when using the perforated pipe aeration process at the bottom of the pool, it is necessary to install brackets and aeration branches at the bottom of the pool, which requires a large installation workload and a long construction period. In addition, the aeration pipe is installed at the bottom of the pool, and the aeration fan needs to overcome the entire water depth, which makes the fan power larger and the operating cost higher. Submersible mixers are generally installed on the pool wall. In order to ensure sufficient mixing in the pool, two submersible mixers are often required. At the same time, the mixer blades are running in the water. When the suspended filler collides with it, the aging filler is easily crushed or the biofilm falls off.

[0005] After years of operation, many reactors have aging aeration pipes, clogged aeration heads, and damaged submersible mixers. When the system is refurbished or renovated, it is necessary to empty the sewage in the pool, remove the fillers and sludge in the pool, remove the old pipelines and equipment, and then install new equipment. This process is very time-consuming and labor-intensive, especially when the reactor is emptied, a large amount of sewage that does not meet the standards needs to be stored, and it is very difficult to remove the fillers and sludge. Utility Model Content

[0006] In view of the problems existing in the current prior art, the utility model provides a floating aeration stirring device, which can reduce the construction difficulty of cleaning a sewage pool, shorten the construction period, and save labor costs.

[0007] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0008] A floating aeration and stirring device is arranged in a sewage reaction tank, comprising an aeration system, a floating system and a plug-flow stirring system, wherein the floating system is connected to the aeration system and the plug-flow stirring system through a connecting device; the plug-flow stirring system comprises a submersible flow propeller, a flow guide tube and a plurality of flow guide water distribution pipes, wherein the submersible flow propeller sucks the upper layer medium of the reaction tank and uniformly guides it to the lower layer of the reaction tank through the flow guide tube and the flow guide water distribution pipe; the aeration system comprises an aeration fan, a static pressure box and an aerator, wherein the aeration fan is conductively connected to the static pressure box, and the aerator is arranged inside the flow guide water distribution pipe and is conductively connected to the static pressure box; after passing through the plug-flow stirring system and the aeration system, the medium diffuses and rises around the bottom with the aeration stirring device as the center, forming a longitudinal circulation shape.

[0009] According to one aspect of the utility model, a transition portion is provided at the bottom of the guide tube, and a plurality of evenly distributed through holes are opened on the side of the transition portion; the guide water distribution pipe is sealed and connected to the through holes, and the guide water distribution pipe is communicated with the guide tube.

[0010] According to one aspect of the utility model, the static pressure box is annular and fixed around the outside of the guide tube. One end of the connecting device is connected to the bottom of the floating system, and the other end is connected to the static pressure box.

[0011] According to one aspect of the utility model, an external air pipeline is conductively connected between the aeration fan and the static pressure box, and an aeration pipe is conductively connected between the static pressure box and the aerator.

[0012] According to one aspect of the utility model, the floating system includes a plurality of buoys, and the aeration fan is arranged on the buoys.

[0013] According to one aspect of the utility model, the upper surface of the buoy is provided with at least one horizontal plane for placing and fixing the aeration fan.

[0014] According to one aspect of the utility model, the aerator is a thin film tube type microporous aerator.

[0015] According to one aspect of the utility model, the connecting device includes a fixing frame and a connecting frame, the fixing frames are symmetrically arranged, and the fixing frames are fixedly connected by connecting pieces.

[0016] According to one aspect of the utility model, the connecting frame is a plurality of vertically arranged steel frames, one end of the steel frame is fixedly connected to the connecting member, and the other end extends downward and is fixedly connected to the static pressure box.

[0017] Advantages of the implementation of the utility model: the utility model is provided with an aeration system, which is composed of an aeration fan, a static pressure box and a thin film tube microporous aerator, which can achieve uniform distribution of air and efficient aeration, increase the oxygen content in the reactor, and promote the oxidation reaction of microorganisms; the plug flow stirring system utilizes a submersible plug flow device, a guide tube and a guide water distribution pipe to effectively suck in the upper layer of water and evenly guide it to the lower part of the reactor, realize the upper inlet and lower outlet of the medium inside the reactor, enhance the mixing effect in the reactor, avoid medium stratification and dead corners, and improve the reaction efficiency; equipped with a buoy, the whole set of equipment can stably float in the water body, adapt to different water depths and changing water levels, no fixed installation is required, and the flexibility and applicability of the equipment are enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the appearance of the floating aeration stirring device described in the utility model;

[0020] Figure 2 This is a top view of the floating aeration stirring device described in the utility model.

[0021] In the figure: 11, aeration fan; 12, static pressure box; 13, aerator; 14, external air pipeline; 15, aeration pipe; 21, buoy; 31, submersible flow pusher; 32, guide tube; 321, adapter; 33, guide water distribution pipe; 41, fixing frame; 42, connecting frame. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 , Figure 2 As shown, a floating aeration stirring device is arranged in a sewage reaction tank, and the device includes an aeration system, a floating system and a plug-flow stirring system, wherein the floating system includes a plurality of buoys 21, and the buoys 21 float on the sewage medium, and their function is to ensure that the entire device can float in the sewage medium. The buoys 21 are connected to the aeration system and the plug-flow stirring system through a connecting device.

[0026] In this embodiment, the float 21 is designed in a long strip shape. In the actual design process, other design methods such as U-shaped floats, disc-shaped floats, etc. may be used. The upper surface of the float 21 needs to be provided with at least one horizontal surface for placing and fixing the aeration fan 11, and each aeration stirring device is provided with at least one pair of floats 21. The material selected for the float 21 can be high-density polyethylene (HDPE) material or stainless steel material, etc., which can be set according to actual process requirements. High-density polyethylene (HDPE) material has excellent weather resistance, chemical corrosion resistance and UV resistance. It can resist the erosion of chemical substances in sewage and maintain stability for a long time. Although stainless steel is relatively heavy, its excellent corrosion resistance and strength also make it a good choice for floats in specific occasions.

[0027] The floating system is connected to the aeration system and the plug-flow stirring system through a connecting device, and the connecting device includes a fixing frame 41 and a connecting frame 42. The fixing frame 41 is two symmetrically arranged support rods, and the two support rods are connected by a connecting piece. In this embodiment, the connecting piece is an annular steel sheet, which is fixedly connected between the two support rods by welding. The connecting frame 42 is a plurality of vertically arranged steel frames, one end of which is fixedly connected to the connecting piece, and the other end extends downward and is fixedly connected to the static pressure box 12 in the aeration system. The height of the steel frame is set according to the actual depth of the sewage pool.

[0028] The flow-pushing and stirring system includes a submersible flow-pushing device 31, a guide tube 32, and a plurality of guide water distribution pipes 33. The submersible flow-pushing device 31 sucks the upper layer medium of the reaction tank and evenly guides it to the lower layer of the reaction tank through the guide tube 32 and the guide water distribution pipe 33. The submersible flow-pushing device 31 is a hydraulic propulsion device used in multiple fields. It is usually driven by an electric motor or a hydraulic system to provide thrust in an underwater environment to achieve liquid stirring, mixing, and sedimentation. In this embodiment, the submersible flow-pushing device 31 is installed below the sewage surface using a guide rod, and its water flow diversion direction is aligned with the guide tube 32, so as to effectively introduce the upper sewage medium into the guide tube 32.

[0029] The guide tube 32 is hollow in design, and an adapter 321 is provided at the bottom of the guide tube 32. A number of evenly distributed through holes are opened on the side of the adapter 321, and the guide water distribution pipe 33 is sealed and connected to the through holes. In this embodiment, 8 guide water distribution pipes 33 are provided, and the guide water distribution pipes 33 and the guide tube 32 are connected, so that the upper sewage medium introduced by the submersible thruster 31 can pass through the guide tube 32 and then through the guide water distribution pipe 33, and be evenly discharged from the lower layer of the reaction tank. It effectively promotes the mixing of water bodies in different areas of the sewage reaction tank, improves the uniformity of the reaction, and introduces the oxygen-rich water in the upper layer into the lower layer, increases the dissolved oxygen content of the lower layer water, and promotes biological reactions. The guide water distribution pipe 33 is evenly and compactly arranged at the bottom of the guide tube 32, which helps to avoid the situation where the sewage water flow has dead corners or excessive concentration inside the guide tube 32, and improves the mixing efficiency and reaction rate.

[0030] The aeration system includes an aeration fan 11, a static pressure box 12 and an aerator 13. An external air supply pipeline 14 is connected between the aeration fan 11 and the static pressure box 12. An aerator 13 is provided inside each diversion water distribution pipe 33 and is connected to the static pressure box 12. The aeration fan 11 mainly adds air or other gases to the water body through the air supply pipeline through a blower to increase the dissolved oxygen content in the water body. The aeration fan 11 can provide sufficient dissolved oxygen for microorganisms to decompose organic matter and improve the treatment effect. The aeration fan 11 is arranged on the buoy 21. In this embodiment, two aeration fans 11 are arranged to supply air to the water body.

[0031] The static pressure box 12 is annular and is a steel welded structural box. The static pressure box 12 is fixed around the outside of the guide tube 32, and the steel frame is fixedly connected to the upper surface of the static pressure box 12. The static pressure box 12 and the aerator 13 are connected through the aeration pipe 15. Each diversion water distribution pipe 33 is provided with a multi-way aerator 13. The aeration pipe 15 passes through the diversion water distribution pipe 33 and is separately connected to each aerator 13. The device introduces air into the static pressure box 12 through the aeration fan 11, and the static pressure box 12 supplies air to the aeration pipe 15. The aeration pipe 15 evenly guides the air to each diversion water distribution pipe 33 and then discharges it.

[0032] Specifically, the aerator 13 is a thin film tube microporous aerator 13, which can produce smaller bubbles, which not only helps to increase the contact area of ​​oxygen and improve the utilization rate of oxygen, but also can achieve the effect of mixing and stirring. At the same time, the microporous structure can also prevent the pores from being blocked, ensure the continuity and stability of the aeration process, and prevent sewage from backflowing into the aerator 13. The aerator 13 is arranged on the inner wall of the diversion water distribution pipe 33, and each inner wall of the diversion water distribution pipe 33 is provided with 8 evenly distributed aerators 13 for air supply.

[0033] The working principle of the utility model is as follows: the sewage in the upper layer of the sewage reaction tank is sucked in from all sides through the submersible flow propeller 31, and is evenly diverted to the lower layer of the reaction tank through the guide tube 32 and the diversion water distribution pipe 33. At the same time, the aeration system introduces air into the static pressure box 12 through the aeration fan 11, and the thin film tube type microporous aerator 13 located in the diversion water distribution pipe 33 is connected to the static pressure box 12, and the air is evenly arranged in each diversion water distribution pipe 33. The sewage medium inside the device enters from the top and exits from the bottom, and the external sewage medium diffuses and rises around the bottom of the device with the device as the center, and returns to the upper layer of the sewage reaction tank. The reciprocating cycle makes the entire sewage medium present a longitudinal circulation shape, further enhancing the mixing effect and oxygen distribution. Through continuous work, the medium in the entire sewage reaction tank is fully mixed and evenly mixed, and is rich in oxygen, providing sufficient oxygen for microorganisms to carry out oxidation reactions, thereby improving the treatment effect.

[0034] The aeration device used in conventional aeration cylinders is arranged at the bottom of the reaction tank, and the aeration fan 11 is arranged in a special machine room or next to the reaction tank. The air supply pressure of the aeration fan 11 needs to overcome the pipeline resistance, hydrostatic pressure, aeration device working pressure and aeration system load pressure. The aeration fan 11 often requires greater power to provide sufficient air flow, which leads to high fan energy consumption and high operating costs. The aeration system of the utility model is different from the conventional aeration system in that the tubular membrane aeration tube 15 is arranged in the diversion water distribution pipe 33. Since the sewage medium is in a high-speed flow state, the hydrostatic pressure that the aeration fan 11 needs to overcome can be reduced by the potential energy of the water flow, thereby reducing the power of the aeration fan 11, thereby reducing the operating cost of the system, and reducing the complexity and maintenance difficulty of the system.

[0035] Since the floating aeration stirring device provided by the utility model can float on the water surface, when the reaction pool needs to be modified or cleaned and maintained, the water pool, sludge and existing device do not need to be emptied, and the device can be directly hoisted in the reaction pool, fixed by a proprietary device and connected to the power supply to perform other cleaning work. The use of this device can greatly shorten the construction period and construction difficulty, and reduce maintenance and operation costs.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A floating aeration stirring device, arranged in a sewage reaction tank, characterized in that: The invention comprises an aeration system, a floating system and a plug-flow stirring system, wherein the floating system is connected to the aeration system and the plug-flow stirring system via a connecting device; the plug-flow stirring system comprises a submersible flow propeller (31), a flow guide tube (32) and a plurality of flow guide water distribution pipes (33); the submersible flow propeller (31) sucks the medium in the upper layer of the reaction tank and evenly guides the medium to the lower layer of the reaction tank through the flow guide tube (32) and the flow guide water distribution pipes (33); the aeration system comprises an aeration fan (11), a static pressure box (12) and an aerator (13); the aeration fan (11) is conductively connected to the static pressure box (12); the aerator (13) is arranged inside the flow guide water distribution pipe (33) and is conductively connected to the static pressure box (12).

2. The floating aeration stirring device according to claim 1, characterized in that: The bottom of the flow guide tube (32) is provided with a transition portion (321), and the side of the transition portion (321) is provided with a plurality of evenly distributed through holes; the flow guide water distribution pipe (33) is sealed and connected to the through holes, and the flow guide water distribution pipe (33) is in communication with the flow guide tube (32).

3. The floating aeration and stirring device according to claim 1, characterized in that: The static pressure box (12) is annular and is fixed around the outside of the guide tube (32). One end of the connecting device is connected to the bottom of the floating system, and the other end is connected to the static pressure box (12).

4. The floating aeration and stirring device according to claim 1, characterized in that: An external air supply pipeline (14) is conductively connected between the aeration fan (11) and the static pressure box (12), and an aeration pipe (15) is conductively connected between the static pressure box (12) and the aerator (13).

5. The floating aeration and stirring device according to claim 1, characterized in that: The floating system comprises a plurality of buoys (21), and the aeration fan (11) is arranged on the buoys (21).

6. The floating aeration and stirring device according to claim 5, characterized in that: The upper surface of the buoy (21) is provided with at least one horizontal surface for placing and fixing the aeration fan (11).

7. The floating aeration and stirring device according to claim 1, characterized in that: The aerator (13) is a thin film tube type microporous aerator (13).

8. The floating aeration and stirring device according to claim 1, characterized in that: The connecting device comprises a fixing frame (41) and a connecting frame (42); the fixing frames (41) are symmetrically arranged, and the fixing frames (41) are fixedly connected via a connecting piece.

9. The floating aeration and stirring device according to claim 8, characterized in that: The connecting frame (42) is a plurality of vertically arranged steel frames, one end of which is fixedly connected to the connecting piece, and the other end of which extends downward and is fixedly connected to the static pressure box (12).

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