An MBR intermittent aeration device

Abstract

The present invention discloses an MBR intermittent aeration device, comprising a drum with a drum cover at the upper end, the interior of the drum is divided into an upper part and a lower part by a middle partition, the upper part is connected to a total air inlet, the lower part is divided into a left half and a right half by a square partition, a left air outlet and a right air outlet are provided on the side wall of the drum, the left air outlet is connected to the left half, the right air outlet is connected to the right half, the middle partition is provided with two through holes respectively connected to the left half and the right half, a turntable is relatively rotatably attached to the middle partition, the turntable covers the through hole, the turntable is driven to rotate by a motor, and a vent is provided on the turntable, and the vent corresponds to the through hole. The present invention provides a simple and stable intermittent aeration device, so that the intermittent aeration MBR system can operate stably. It has the advantages of stable operation and adjustable gap frequency, and effectively avoids the problem of frequent failure of the aeration process of traditional valve switch.

Description

Technical Field

[0001] The invention belongs to the technical field of aeration devices, and in particular relates to an MBR intermittent aeration device. Background Art

[0002] The membrane bioreactor (hereinafter referred to as MBR) replaces the traditional secondary sedimentation tank with membrane separation technology, filters the biochemical sewage out of the bioreactor, and obtains treated water with very low turbidity. At the same time, the sludge, bacteria and macromolecular organic matter in the system are still kept in the reactor. This separation method improves the effluent quality, increases the sludge concentration in the reactor, and retains beneficial microorganisms. Compared with the traditional activated sludge method, the effluent quality of MBR technology is good, COD, BOD, and turbidity are very low, most bacteria and viruses are intercepted, and the effluent quality reaches or exceeds the water quality standard for domestic miscellaneous water. It can be directly reused as reclaimed water for urban landscaping, cleaning, fire fighting, cooling circulating water and other applications. The efficient interception effect of the membrane in MBR technology also realizes the separation of sewage retention time and microbial retention time. The concentration of microorganisms and sludge is high, the footprint is small, the sludge output is small, and the treatment efficiency is high.

[0003] When the MBR membrane is running, a relatively large amount of aeration is required to flush the membrane surface to prevent excessive sludge deposition on the membrane surface from affecting the stable operation of the MBR membrane system. In the actual operation of the MBR membrane, the gas-water ratio is generally between 15-30, and in some special areas it even exceeds 50. Too high aeration-water ratio indicates too high aeration operation energy consumption. Excessive operation energy consumption has become a major shortcoming of the MBR treatment process and needs to be improved.

[0004] It is known that intermittent aeration can effectively reduce the gas-water ratio of MBR operation, which is a very effective method to reduce the energy consumption of MBR operation. However, the current method of producing intermittent aeration is mostly to use valve switching. For valve operation that switches on and off multiple times per minute, valve switch failure often occurs, resulting in the inability of intermittent aeration to be applied on a large scale. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an MBR intermittent aeration device, comprising a drum with a drum cover on the upper end, the interior of the drum is divided into an upper part and a lower part by a middle partition, the upper part is connected to a total air inlet, and the lower part is divided into a left half and a right half by a square partition, the upper side of the square partition is sealed with the middle partition, a left air outlet and a right air outlet are provided on the side wall of the drum, the left air outlet is connected to the left half, and the right air outlet is connected to the right half, the middle partition is provided with two through holes respectively connected to the left half and the right half, a turntable is rotatably attached to the middle partition, the turntable covers the through hole, the turntable is driven to rotate by a motor, and a vent is provided on the turntable, and the vent corresponds to the through hole.

[0006] As a preferred embodiment of the above technical solution, the through hole is semi-annular, the semi-annular through hole is coaxial with the barrel, connecting ribs are respectively provided between the two ends of the two semi-annular through holes, the upper surface of the connecting ribs is flush with the upper surface of the middle partition, and the lower surface of the connecting ribs is sealed and connected to the square partition.

[0007] As a preferred embodiment of the above technical solution, the vent hole is surrounded by an outer arc edge, an inner arc edge and two equidistant side edges, the center of the outer arc edge and the center of the inner arc edge are both located on the axis of the turntable, and the length of the side edge is equal to the width of the semi-circular through hole.

[0008] As a preferred embodiment of the above technical solution, the through hole is divided into a plurality of small through holes by a plurality of dividing ribs, and the dividing ribs all point to the axis of the middle partition.

[0009] As a preferred embodiment of the above technical solution, the lower surface of the turntable is a smooth surface, the connecting ribs and the middle partition are integrally formed, and the upper surface of the middle partition and the upper surface of the connecting ribs are both smooth surfaces.

[0010] As a preferred embodiment of the above technical solution, the turntable is made of nylon or polytetrafluoroethylene.

[0011] As a preferred embodiment of the above technical solution, the motor is installed on the barrel cover and located on the outside of the barrel. A connecting shaft is provided on the upper part. The upper end of the connecting shaft is fixedly connected to the rotating shaft of the motor through a coupling, and the lower end of the connecting shaft is fixedly connected to the turntable. The rotating shaft of the motor, the connecting shaft and the turntable are coaxially arranged.

[0012] As a preferred embodiment of the above technical solution, the motor is a variable frequency motor.

[0013] As a preferred embodiment of the above technical solution, the left air outlet, the right air outlet and the main air inlet are respectively provided with connecting flanges.

[0014] The beneficial effects of the present invention are as follows: the present invention provides a simple and stable intermittent aeration device, which enables the intermittent aeration MBR system to operate stably. It has the advantages of stable operation and adjustable interval frequency, and effectively avoids the problem of frequent failure of the traditional valve switch aeration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the turntable;

[0018] Figure 4 It is a structural diagram of the middle partition. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] 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 according to specific circumstances.

[0022] like Figure 1-4 As shown, an MBR intermittent aeration device comprises a drum 2 with a drum cover 1 at the upper end, the interior of the drum 2 is divided into an upper part 4 and a lower part by a middle partition 3, the upper part 4 is connected to a total air inlet 5, and the lower part is divided into a left half 7 and a right half 8 by a square partition 6, the upper side of the square partition 6 is sealedly connected to the middle partition 3, a left air outlet 9 and a right air outlet 10 are provided on the side wall of the drum 2, the left air outlet 9 is connected to the left half 7, and the right air outlet 10 is connected to the right half 8, the middle partition 3 is provided with two through holes 11 respectively connected to the left half 7 and the right half 8, a turntable 12 is rotatably attached to the middle partition 3, the turntable 12 covers the through hole 11, the turntable 12 is driven to rotate by a motor 13, and a vent 14 is provided on the turntable 12, and the vent 14 corresponds to the through hole 11. An annular platform 15 is arranged on the inner wall of the drum 2, and the periphery of the middle partition plate 3 is placed on the annular platform 15 and is sealed and connected to the annular platform 15 by glue.

[0023] Furthermore, the through hole 11 is semi-annular, and the semi-annular through hole 11 is coaxial with the barrel 2. Connecting ribs 16 are respectively provided between the two ends of the two semi-annular through holes 11. The upper surface of the connecting rib 16 is flush with the upper surface of the middle partition 3, and the lower surface of the connecting rib 16 is sealed and connected to the square partition 6.

[0024] Furthermore, the vent hole 14 is surrounded by an outer arc edge, an inner arc edge 18 and two equidistant side edges 19 , the center of the outer arc edge and the center of the inner arc edge 18 are both located on the axis of the turntable 12 , and the length of the side edge 19 is equal to the width of the semi-circular through hole 11 .

[0025] Furthermore, the through hole 11 is divided into a plurality of small through holes 22 by a plurality of dividing ribs 21 , and the dividing ribs 21 all point to the axis of the middle partition 3 .

[0026] Furthermore, the lower surface of the rotating disk 12 is a smooth surface, the connecting rib 16 is integrally formed with the middle partition 3, and the upper surface of the middle partition 3 and the upper surface of the connecting rib 16 are both smooth surfaces. The lower surface of the rotating disk 12 and the upper surface of the middle partition 3 are in direct contact and rotate, and the smooth surface improves the sealing effect and prevents gas from passing through.

[0027] Further, the rotating disk 12 is made of nylon or polytetrafluoroethylene, so as to reduce the friction with the middle partition plate 3 and improve the wear resistance of the rotating disk 12.

[0028] Furthermore, the motor 13 is installed on the barrel cover 1 and is located on the outside of the barrel 2. The upper part 4 is provided with a connecting shaft 17. The upper end of the connecting shaft 17 is fixedly connected to the rotating shaft of the motor 13 through a coupling. The lower end of the connecting shaft 17 is fixedly connected to the turntable 12. The rotating shaft of the motor 13, the connecting shaft 17, and the turntable 12 are coaxially arranged.

[0029] Furthermore, the motor 13 is a variable frequency motor.

[0030] Furthermore, the left air outlet 9 , the right air outlet 10 , and the main air inlet 5 are respectively provided with connecting flanges 20 .

[0031] The main air inlet 5 is compressed with high-pressure gas by a compressor. The motor 13 drives the turntable 12 to rotate, and the vent 14 on the turntable 12 moves in a circular motion, and the motion trajectory is consistent with the two semi-circular through holes 11 on the middle partition 3 below. The gas enters the upper part 4 through the main air inlet 5. Because the lower part is divided into the left half 7 and the right half 8 by the square partition 6, the two semi-circular through holes 11 of the middle partition 3 are connected to the left half 7 and the right half 8 respectively. Therefore, when the vent 14 on the turntable 12 rotates through the semi-circular through hole 11 connected to the left half 7, the gas will flow into the left half 7 and be discharged through the left outlet 9; when the vent 14 of the turntable 12 passes through the semi-circular through hole 11 connected to the right half 8, the gas will flow into the right half 8 and be discharged through the right outlet 10. The left outlet 9 and the right outlet 10 are connected to the aeration pipe through the flange 20 and the air pipe respectively, and the aeration pipe is placed under different MBR membranes for aeration. The gas will not flow between the left half 7 and the right half 8. In this way, the gas reversal of the intermittent aeration device is achieved. The intermittent aeration device can control the MBR aeration and stop time to be between 0.5 seconds and 1 minute, and the more preferred solution is between 1 second and 15 seconds.

[0032] It is worth mentioning that the technical features such as the variable frequency motor involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0033] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An MBR intermittent aeration device, characterized in that: The utility model comprises a drum with a drum cover at the upper end, the interior of the drum is divided into an upper part and a lower part by a middle partition, the upper part is connected with a total air inlet, the lower part is divided into a left half and a right half by a square partition, the upper side of the square partition is sealedly connected with the middle partition, a left air outlet and a right air outlet are arranged on the side wall of the drum, the left air outlet is connected with the left half, and the right air outlet is connected with the right half, the middle partition is provided with two through holes respectively connected with the left half and the right half, a turntable is relatively rotatably attached to the middle partition, the turntable covers the through hole, the turntable is driven to rotate by a motor, a vent hole is arranged on the turntable, the vent hole corresponds to the through hole, and the through hole is semi-annular The semi-annular through hole is coaxial with the barrel, and connecting ribs are respectively arranged between the two ends of the two semi-annular through holes. The upper surface of the connecting rib is flush with the upper surface of the middle partition, and the lower surface of the connecting rib is sealed and connected to the square partition. The vent hole is surrounded by an outer arc edge, an inner arc edge and two equidistant side edges. The center of the outer arc edge and the center of the inner arc edge are both located on the axis of the turntable, and the length of the side edge is equal to the width of the semi-annular through hole. The motor is installed on the barrel cover and is located outside the barrel. A connecting shaft is provided on the upper part. The upper end of the connecting shaft is fixedly connected to the rotating shaft of the motor through a coupling, and the lower end of the connecting shaft is fixedly connected to the turntable. The rotating shaft of the motor, the connecting shaft and the turntable are coaxially arranged.

2. The MBR intermittent aeration device according to claim 1, characterized in that: The through hole is divided into a plurality of small through holes by a plurality of dividing ribs, and the dividing ribs all point to the axis of the middle partition.

3. The MBR intermittent aeration device according to claim 2, characterized in that: The lower surface of the turntable is a smooth surface, the connecting ribs are integrally formed with the middle partition, and the upper surface of the middle partition and the upper surface of the connecting ribs are both smooth surfaces.

4. The MBR intermittent aeration device according to claim 3, characterized in that: The turntable is made of nylon or polytetrafluoroethylene.

5. The MBR intermittent aeration device according to claim 4, characterized in that: The motor is a variable frequency motor.

6. The MBR intermittent aeration device according to claim 5, characterized in that: The left air outlet, the right air outlet and the main air inlet are respectively provided with connecting flanges.

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