A liftable aeration component and biochemical sewage treatment reactor

Abstract

A liftable aeration assembly and a biochemical sewage treatment reactor, the liftable aeration assembly comprises an aeration tube group and a plurality of aeration discs mounted on the aeration tube group, the outer edge of the aeration tube group is provided with a plurality of sliding protrusions, the sliding protrusions are used to slide with a slideway provided in the reactor, so that the aeration assembly can slide along the slideway to the top of the reactor; the aeration disc is connected to the aeration tube group through an electromagnetic valve, and an air bag is provided on the aeration tube group, the air bag is used to expand through the aeration tube group after the electromagnetic valve is closed, and generate buoyancy to push the aeration assembly to float. The present invention facilitates the maintenance of the aeration assembly and reduces the influence of the maintenance of the aeration assembly on the normal sewage treatment process.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, in particular to a liftable aeration component and a biochemical sewage treatment reactor. Background Art

[0002] In the biochemical sewage treatment system, aeration components in linear or circular arrays are generally arranged at the bottom of aerobic reactors such as various pools or reaction towers to provide the necessary oxygen for microorganisms to carry out aerobic biochemical and aerobic nitrification reactions. However, the arranged aeration components are generally fixed at the bottom of the reactor. When the aeration components are damaged, all the sewage in the reactor can only be drained for maintenance, resulting in long-term shutdown and production suspension, affecting the normal sewage treatment process. Summary of the invention

[0003] The present invention aims to provide a liftable aeration component and a biochemical sewage treatment reactor, which are convenient for the maintenance of the aeration component and reduce the influence of the maintenance of the aeration component on the normal sewage treatment process.

[0004] In order to solve the above technical problems, the specific scheme adopted by the present invention is: a liftable aeration assembly, including an aeration tube group and a plurality of aeration plates mounted on the aeration tube group, the outer edge of the aeration tube group is provided with a plurality of sliding protrusions, the sliding protrusions are used to slide with a slideway provided in the reactor so that the aeration assembly can slide along the slideway to the top of the reactor; the aeration plate is connected to the aeration tube group through an electromagnetic valve, and an air bag is provided on the aeration tube group, the air bag is used to expand through the aeration tube group after the electromagnetic valve is closed, and generate buoyancy to push the aeration assembly to float.

[0005] Preferably, the aeration tube group is cross-shaped, and sliding protrusions are formed on the four ends of the aeration tube group respectively.

[0006] Preferably, the airbag is disc-shaped, and the center position of the top of the airbag is connected to the aeration tube group through a rigid connecting tube. A plurality of rectangular deformation direction control protrusions are arranged at intervals along a diameter direction of the airbag on the top of the airbag. Any deformation direction control protrusion has an inner cavity connected to the airbag. A straight elastic clip is arranged at the bottom of the airbag. The distribution direction of the elastic clip corresponds to the connection direction of all the deformation direction control protrusions. Both ends of the elastic clip extend out of the airbag and are used to engage with the clip grooves arranged on the inner wall of the reactor.

[0007] Preferably, a solenoid valve is provided between any aeration disk and the aeration pipe group.

[0008] Preferably, the aeration tube group and the sliding protrusion are both made of rigid material.

[0009] Preferably, the aeration pipe group is connected to the air source via a flexible air pipe and an air pump, and a pressure sensor is provided in the air bag.

[0010] A biochemical sewage treatment reactor comprises a reactor shell and the aforementioned liftable aeration component.

[0011] Preferably, a guide tube is provided in the reactor shell above the aeration assembly, an upflow zone is formed inside the guide tube, and a downflow zone is formed between the guide tube and the reactor shell. The sewage in the reactor shell is aerated in the upflow zone by the aeration assembly to generate thrust to rise, and after overflowing from the top of the upflow zone to the downflow zone, it drops due to the pressure difference and forms an internal circulation.

[0012] Preferably, a slideway for slidingly engaging the sliding protrusion is provided on the inner wall of the guide tube, the lower end of the slideway is closed, and the upper end is open and extends to the top of the reactor shell.

[0013] Preferably, a plurality of draft tubes are arranged at intervals in the reactor shell, and a corresponding aeration assembly is arranged at the bottom of any draft tube.

[0014] The aeration assembly of the present invention is vertically slidably arranged in the reactor, and the aeration assembly is provided with an air bag, and the buoyancy generated by the inflation of the air bag automatically pushes the aeration assembly to float to the top of the reactor. When the aeration assembly is damaged and needs to be repaired, the air bag can be inflated to generate buoyancy by closing the solenoid valve, so as to push the aeration assembly to the top of the reactor for repair, thereby reducing the impact on production caused by the repair of the aeration assembly.

[0015] In a further preferred embodiment of the present invention, the aerator assembly is positioned in a slot in the reactor by means of an elastic clip disposed below the airbag to avoid displacement, and the elastic clip automatically bends and disengages from the slot when the airbag is inflated and deformed, automatically releasing the positioning of the aeration assembly so that it can float due to buoyancy, with a high degree of automation and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a biochemical wastewater treatment reactor according to Example 1 of the present invention;

[0017] Figure 2 for Figure 1 AA-direction cross-sectional structural diagram;

[0018] Figure 3 This is a schematic structural diagram of a liftable aeration component in a biochemical wastewater treatment reactor according to Example 2 of the present invention;

[0019] Markings in the figure: 1. Upflow zone, 2. Guide tube, 3. Downflow zone, 4. Reactor shell, 5. Water inlet, 6. Aeration plate, 7. Aeration tube group, 701. Sliding protrusion, 8. Water outlet, 9. Slide, 10. Deformation direction control protrusion, 11. Rigid connecting pipe, 12. Air bag, 13. Elastic clip, 14. Slot. DETAILED DESCRIPTION

[0020] The biochemical sewage treatment reactor and the corresponding liftable aeration assembly of the present invention are described below through two embodiments:

[0021] Example 1

[0022] like Figure 1 As shown, a biochemical wastewater treatment reactor of the present invention is used as an aerobic reactor, which includes a reactor shell 4, a guide tube 2 concentrically arranged in the reactor shell 4, and a liftable aeration assembly.

[0023] The bottom of the left side of the reactor shell 4 is provided with a water inlet 5, and the top of the right side is provided with a water outlet 8. The sewage entering the reactor shell 4 through the water inlet 5 eventually overflows through the water outlet 8. The upper and lower ends of the guide tube 2 are both open, and the water inlet 5 extends into the center of the guide tube 2 and passes the sewage into the guide tube 2. The aeration component is located at the bottom of the guide tube 2. The air microbubbles generated in the aeration component push the sewage in the guide tube 2 to rise, thereby forming an upflow area 1 in the guide tube 2 to push the sewage up. After the sewage reaches the upper end of the guide tube 2, most of the sewage settles from the upper end of the guide tube 2 under the action of the pressure difference, thereby forming a downflow area 3 between the guide tube 2 and the reactor shell 4, and then the sewage circulates between the upflow area 1 and the downflow area 3 to form a circulation, so that the sewage and microorganisms that continuously enter the reactor shell 4 enter the fluidized state together, and the pollutants in the sewage will be quickly diluted and homogenized, and the pollutant concentration gradient in the entire reactor shell 4 is very low. Even if the pollutant concentration of the external sewage changes greatly, it will be quickly homogenized and diluted, and will not cause impact on the entire system. Because the conventional reactor shell 4 is mixed by arranging a flow pusher, it is a dynamic device. On the one hand, it is difficult to quickly homogenize and dilute the pollutants, which will cause the system to be impacted by the pollutant load; on the other hand, the flow pusher requires a large amount of power loss, resulting in high operating costs, and the submersible flow pusher has a high maintenance frequency. The guide tube 2 in this embodiment is a static device, which is not easy to damage and does not require an external power supply to save operating costs. In addition, the combination of gas and water produced by the aerator further improves the homogenization rate of pollutants and greatly improves the efficiency of biochemical reactions.

[0024] Combination Figure 1 and Figure 2 As shown, the aeration assembly in this embodiment includes an aeration tube group 7 and a plurality of aeration plates 6 mounted on the aeration tube group 7. The aeration tube group 7 is a cross-shaped welded rigid high-pressure tube, which is connected to a high-pressure air source (not shown in the figure) through a hose and an air pump, and a plurality of aeration plates 6 are evenly spaced along its upper edge. The four ends of the aeration tube group 7 form sliding protrusions 701 respectively, and a slideway 9 for sliding cooperation with the corresponding sliding protrusions 701 is provided on the inner wall of the guide tube 2. The bottom of the slideway 9 is closed, so that the aeration assembly can be used as in normal use. Figure 1 As shown, it falls to the bottom closed end of the slide 9 due to its own gravity; the top of the slide 9 is open and extends to a position close to the top of the reactor shell 4, so that when the aeration component is damaged or overhauled, the aeration tube group 7 can be pushed / pulled by external force to rise to the top of the reactor shell 4 for overhaul.

[0025] Example 2

[0026] In this embodiment, the aeration assembly can be positioned below the guide tube 2 through a mechanical structure, and can be conveniently moved to the top of the reactor shell 4 when maintenance is required, to prevent it from settling to the bottom of the guide tube 2 solely by gravity, which may easily cause shaking or accidental sinking.

[0027] like Figure 3 As shown, the aeration disc 6 in this embodiment is connected to the aeration tube group 7 through a one-to-one corresponding electromagnetic valve, and an air bag 12 made of flexible material is distributed below the aeration tube group 7. The air bag 12 is in a flat disc shape, and its center position is connected to the middle position of the aeration tube group 7 through a rigid connecting pipe 11. An elastic clip 13 distributed along its own radial direction is provided at its bottom, and both ends of the elastic clip 13 extend out of the outer edge of the air bag 12 by the same length.

[0028] Under normal operation of the reactor, all electromagnetic valves are in the open state. At this time, most of the air pumped into the aeration tube group 7 by the air pump enters the aeration plate 6 through the electromagnetic valve and forms floating bubbles in the guide tube 2. Only a small part of the air enters the airbag 12, causing the airbag 12 to deform slightly. At this time, the elastic clip 13 also deforms slightly with the airbag 12, but its deformation amplitude still makes the straight-line distance between its two ends smaller than the inner diameter of the guide tube 2, so that its two ends are plugged and matched in the slots opened on the inner wall of the guide tube 2 to achieve the positioning of the entire aeration component. During the maintenance process, it is only necessary to close all electromagnetic valves, and the air filled into the aeration tube group 7 by the air pump enters the airbag 12, causing the airbag 12 to deform significantly and causing the elastic clip 13 to bend synchronously until the straight-line length between the two ends of the elastic clip 13 is smaller than the diameter of the guide tube 2, that is, the positioning of the entire aeration component is contacted, so that it floats to the top of the reactor under the buoyancy provided by the airbag 12 for maintenance. In order to prevent the airbag 12 from being overfilled, a pressure sensor is provided in the airbag 12 and a remote controller is provided to facilitate remote control by an operator.

[0029] In order to make the elastic clip strip 13 bend upward in the middle during the inflation of the airbag 12 so that its two ends can be respectively released from the slots 14, in this embodiment, a row of deformation direction control protrusions 10 is provided on the upper edge of the airbag 12. The deformation direction control protrusions 10 are made of the same material as the airbag 12, and the inner cavity is the same as that of the airbag 12. The distribution direction of the deformation direction control protrusions 10 is consistent with the length direction of the elastic clip strip 13, so that during the inflation process, the deformation direction control protrusions 10 swell in the middle in the height direction and push each other, so that the airbag 12 is high in the middle and low on the left and right sides, and then the elastic strip plate is deformed synchronously to be released from the positioning of the slot 14.

[0030] In this embodiment, when the aeration assembly is repositioned after maintenance, all electromagnetic valves can be opened to release the air in the airbag 12, and then the aeration assembly is pulled down by the winch and rope arranged at the bottom of the reactor shell 4. During the descent of the aeration assembly, the elastic clip 13 is in a deformed state and contacts the inner wall of the guide tube 2. After it is lowered to the corresponding slot 14, it can be automatically inserted into the slot 14 to achieve positioning again. There are at least two ropes, which are respectively connected to the ends of the elastic clip 13 and descend synchronously with the same amplitude.

Claims

1. A liftable aeration assembly, comprising an aeration tube group (7) and a plurality of aeration plates (6) cooperatively mounted on the aeration tube group (7), characterized in that: The outer edge of the aeration tube group (7) is provided with a plurality of sliding protrusions (701), and the sliding protrusions (701) are used to slide with a slideway (9) arranged in the reactor, so that the aeration component can slide along the slideway (9) to the top of the reactor; the aeration plate (6) is connected to the aeration tube group (7) through an electromagnetic valve, and the aeration tube group (7) is provided with an air bag (12), and the air bag (12) is used to expand through the aeration tube group (7) after the electromagnetic valve is closed, and generate buoyancy to push the aeration component to float upward; The aeration tube group (7) is cross-shaped, and sliding protrusions (701) are formed at the four ends of the aeration tube group (7); the airbag (12) is disc-shaped, and the center position of the top of the airbag (12) is connected to the aeration tube group (7) through a rigid connecting tube (11); a plurality of rectangular deformation direction control protrusions (10) are arranged at intervals on the top of the airbag (12) along a diameter direction of the airbag (12); any deformation direction control protrusion (10) has an inner cavity connected to the airbag (12); a linear elastic clip strip (13) is arranged at the bottom of the airbag (12); the distribution direction of the elastic clip strip (13) corresponds to the connection direction of all the deformation direction control protrusions (10); and both ends of the elastic clip strip (13) extend out of the airbag (12) and are used to be clipped and matched with a clip groove (14) arranged on the inner wall of the reactor.

2. A liftable aeration assembly according to claim 1, characterized in that: A solenoid valve is provided between any aeration plate (6) and the aeration pipe group (7).

3. A liftable aeration assembly according to claim 1, characterized in that: The aeration tube group (7) and the sliding protrusion (701) are both made of rigid material.

4. The liftable aeration assembly according to claim 1, characterized in that: The aeration pipe group (7) is connected to an air source via a flexible air pipe and an air pump, and a pressure sensor is provided in the air bag (12).

5. A biochemical wastewater treatment reactor, characterized in that: A reactor shell (4) and a liftable aeration component as claimed in any one of claims 1 to 3.

6. A biochemical wastewater treatment reactor according to claim 5, characterized in that: A guide tube (2) is provided above the aeration assembly in the reactor shell (4); an upflow zone (1) is formed inside the guide tube (2); a downflow zone (3) is formed between the guide tube (2) and the reactor shell (4); sewage in the reactor shell (4) is aerated in the upflow zone (1) by the aeration assembly to generate thrust to rise; after overflowing from the top of the upflow zone (1) to the downflow zone (3), it falls due to the pressure difference and forms an internal circulation.

7. A biochemical wastewater treatment reactor according to claim 6, characterized in that: A slideway (9) for slidingly engaging the sliding protrusion (701) is provided on the inner wall of the guide tube (2); the lower end of the slideway (9) is closed, and the upper end is open and extends to the top of the reactor shell (4).

8. The biochemical wastewater treatment reactor according to claim 6, characterized in that: A plurality of draft tubes (2) are arranged at intervals in the reactor shell (4), and a corresponding aeration component is arranged at the bottom of any draft tube (2).

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