Membrane bioreactor capable of preventing membrane pollution

Abstract

The utility model discloses a membrane bioreactor capable of preventing membrane pollution, which comprises a plurality of symmetrically arranged fixed membrane frames, one end of each fixed membrane frame is fixedly connected with a mounting base, each mounting base is provided with a plurality of threaded mounting holes, and each fixed membrane frame is provided with a biological membrane; each fixed membrane frame is provided with a cleaning rolling brush, the cleaning rolling brushes are in contact with one side of a biological membrane, part mounting grooves are formed in the fixed membrane frames, fixed racks are mounted on the inner bottom walls of the part mounting grooves, straight spur gears and rotating fan blades are mounted at one ends of the cleaning rolling brushes, and the straight spur gears and the rotating fan blades are mounted on the inner bottom walls of the part mounting grooves. The straight spur gear is located in the part mounting groove and engaged with the fixed rack, and the rotary fan blade is located outside the fixed film frame and located at the end, away from the mounting base, of the fixed film frame. The biological membrane cleaning device is ingenious in structure and reasonable in design, the straight spur gear and the fixed rack are meshed to achieve movement of the cleaning rolling brush, the cleaning rolling brush moves and rotates at the same time to clean the side, reacting with liquid, of a biological membrane, and cleaning is easy and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane bioreactors, in particular to a membrane bioreactor capable of preventing membrane pollution. Background Art

[0002] Membrane bioreactor is an important type of wastewater treatment technology. It is widely used in the treatment process of high-concentration organic wastewater. The membrane module replaces the secondary sedimentation tank to maintain a high concentration of active sludge in the bioreactor to reduce the land occupation of sewage treatment facilities and reduce the amount of sludge by maintaining a low sludge load. Due to its effective interception effect, the membrane bioreactor can retain microorganisms with a long generation cycle and can achieve deep purification of sewage. At the same time, nitrifying bacteria can fully reproduce in the system, and its nitrification effect is obvious, which provides the possibility for deep phosphorus removal and nitrogen removal. Compared with traditional biochemical water treatment technology, MBR has the following main characteristics: high treatment efficiency and good effluent quality; compact equipment and small footprint; easy to realize automatic control and simple operation and management. However, due to the clogging of membrane pores by granular or sticky organic matter, membrane bioreactors often have membrane pollution problems. After membrane pollution, the transmembrane pressure difference increases, which not only reduces the membrane flux, but also easily causes membrane damage, thus restricting the development and promotion of MBR technology.

[0003] At present, the problem of membrane pollution is generally solved by regular manual or mechanical cleaning of the membrane components. The later maintenance process of the membrane bioreactor requires the membrane device to be lifted out and into the bioreactor. However, the upper surface of the membrane device is generally located below the liquid level of the sewage, so the pressing piece used to fix the membrane device is also located below the liquid level of the sewage. During the cleaning process, the sewage needs to be discharged before the membrane device is cleaned. The work efficiency is low, the pollution problem is not completely solved, and the cleaning cost is high. Utility Model Content

[0004] The utility model aims to solve the problems in the background technology and proposes a membrane bioreactor for preventing membrane pollution.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A membrane bioreactor for preventing membrane pollution, comprising a plurality of symmetrically arranged fixed membrane frames, one end of each of the fixed membrane frames being fixedly connected to a mounting base, each of the mounting bases being provided with a plurality of threaded mounting holes, and each of the fixed membrane frames being mounted with a biofilm;

[0007] A cleaning roller brush is installed on each of the fixed film frames, and the cleaning roller brush contacts one side of the biofilm, a parts mounting groove is opened on the fixed film frame, a fixed rack is installed on the inner bottom wall of the parts mounting groove, a spur gear and a rotating fan blade are installed on one end of the cleaning roller brush, and the spur gear is located in the parts mounting groove and meshed with the fixed rack, and the rotating fan blade is located outside the fixed film frame, and the rotating fan blade is located at one end of the fixed film frame away from the mounting base.

[0008] Preferably, two shaft movable grooves and two bearing movable grooves are symmetrically opened on the two inner side walls of the fixed film frame, and each shaft movable groove is connected to the corresponding bearing movable groove, both ends of the cleaning roller brush pass through the corresponding shaft movable grooves and are installed with rolling bearings, and each rolling bearing is located in the corresponding bearing movable groove.

[0009] Preferably, a limiting connecting groove is provided on the inner side wall of the part installation groove corresponding to the position of the rotating fan blade, and the limiting connecting groove is connected to the bearing movable groove corresponding to the position.

[0010] Preferably, a movable limiting groove is provided on one side of each of the fixed film frames, and the movable limiting groove is communicated with the part mounting groove, and one end of the cleaning roller brush passes through the movable limiting groove and extends outward.

[0011] Preferably, the distance between the upper and lower inner walls of the bearing movable groove is equal to the diameter of the rolling bearing.

[0012] Preferably, the distance between the two inner side walls of the bearing movable groove is equal to the thickness of the rolling bearing.

[0013] Preferably, the distance between the upper and lower inner walls of the shaft movable groove is equal to the distance between the upper and lower inner walls of the limiting connecting groove.

[0014] Preferably, the distance between the upper and lower inner walls of the movable limiting groove is equal to the distance between the upper and lower inner walls of the shaft movable groove.

[0015] Preferably, the rolling bearing is a deep groove ball bearing.

[0016] Preferably, the length of the mounting base is equal to the length of the fixed film frame, and the height of the mounting base is greater than the height of the fixed film frame.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The flow of liquid drives the rotating blades to rotate, thereby realizing the rotation of the cleaning roller brush and the spur gear. The meshing of the spur gear and the fixed rack realizes the movement of the cleaning roller brush. The cleaning roller brush moves and rotates at the same time to clean the side where the biofilm reacts with the liquid.

[0019] 2. During the movement of the cleaning roller brush, the rolling bearing moves in the bearing movable groove, and the ends of the cleaning roller brush move in the shaft movable groove, the limit connecting groove and the movable limit groove. The setting of the bearing movable groove, the shaft movable groove, the limit connecting groove and the movable limit groove ensures the stability of the cleaning roller brush during movement and provides sufficient space.

[0020] In summary, the utility model has an ingenious structure and a reasonable design. The meshing of the spur gear and the fixed rack realizes the movement of the cleaning roller brush. The cleaning roller brush rotates while displacing to clean the side where the biofilm reacts with the liquid, and the cleaning is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a membrane bioreactor for preventing membrane fouling proposed by the utility model;

[0022] Figure 2 This is a schematic structural diagram of a fixed membrane frame in a membrane bioreactor for preventing membrane fouling proposed by the utility model;

[0023] Figure 3 This is an enlarged view of the structure of a cleaning roller brush in a membrane bioreactor for preventing membrane pollution proposed by the utility model;

[0024] Figure 4 This is an enlarged view of the structure of the parts installation groove in the membrane bioreactor for preventing membrane pollution proposed by the utility model.

[0025] In the figure: 1 fixed film frame, 2 mounting base, 3 cleaning roller brush, 4 biofilm, 5 parts mounting groove, 6 rotating fan blade, 7 spur gear, 8 shaft movable groove, 9 movable limiting groove, 10 fixed rack, 11 rolling bearing, 12 limiting connecting groove, 13 bearing movable groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Reference Figure 1-4, a membrane bioreactor for preventing membrane pollution, comprising a plurality of symmetrically arranged fixed membrane frames 1, one end of each fixed membrane frame 1 is fixedly connected to a mounting base 2, the length of the mounting base 2 is equal to the length of the fixed membrane frame 1, the height of the mounting base 2 is greater than the height of the fixed membrane frame 1, and the length can always ensure that the mounting base 2 and the fixed membrane frame 1 can cover the length inside the reactor, avoiding the generation of a gap between the fixed membrane frame 1 and the inner wall of the reactor after the installation is completed, and the liquid flows from the gap between the fixed membrane frame 1 and the inner wall of the reactor to ensure that the liquid can fully contact and filter with the biofilm, each mounting base 2 is provided with a plurality of threaded mounting holes, the width of the mounting base 2 is greater than the width of the fixed membrane frame 1, ensuring that the threaded mounting holes are installed on the mounting base 2 without coinciding with the cross section of the fixed membrane frame 1, avoiding the interference of the fixed membrane frame 1 with the installation of the bolts, ensuring the normal installation of the bolts and the threaded mounting holes, and each fixed membrane frame 1 is installed with a biofilm 4;

[0028] A cleaning roller brush 3 is installed on each fixed film frame 1, and the cleaning roller brush 3 contacts one side of the biofilm 4. It is worth noting that a number of bristles are evenly arranged on the cleaning roller brush 3, and the bristles are against the side wall of the biofilm 4. When the cleaning roller brush 3 rotates, the bristles thereon rotate accordingly and clean the surface of the biofilm 4. It is worth noting that the bristles are made of relatively soft nylon or polyester fiber material to avoid damage to the biofilm 4, but can effectively clean impurities on the surface of the biofilm 4.

[0029] Two shaft movable grooves 8 and two bearing movable grooves 13 are symmetrically provided on the two inner side walls of the fixed film frame 1, and each shaft movable groove 8 is connected with the corresponding bearing movable groove 13, both ends of the cleaning roller brush 3 pass through the corresponding shaft movable grooves 8 and are installed with rolling bearings 11, and each rolling bearing 11 is located in the corresponding bearing movable groove 13, and the rolling bearing 11 adopts a deep groove ball bearing, which is the most representative rolling bearing. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient, a high limit speed, a simple structure, a low manufacturing cost, a high precision, and does not require frequent maintenance. , mainly bear radial load, and can also bear certain axial load. The distance between the upper and lower inner walls of the bearing movable groove 13 is equal to the diameter of the rolling bearing 11, ensuring the activity space of the rolling bearing 11. The setting of the shaft movable groove 8 can clamp the rolling bearing 11 in the bearing movable groove 13 to prevent the rolling bearing 11 from escaping from the bearing movable groove 13. The distance between the two inner side walls of the bearing movable groove 13 is equal to the thickness of the rolling bearing 11. In order to ensure that when the rolling bearing 11 slides in the bearing movable groove 13, the rolling bearing 11 is limited by the bearing movable groove 13 and will not shake when the rolling bearing 11 slides;

[0030] A parts mounting groove 5 is provided on the fixed film frame 1, and a movable limiting groove 9 is provided on one side of each fixed film frame 1, and the movable limiting groove 9 is connected with the parts mounting groove 5, and one end of the cleaning roller brush 3 passes through the movable limiting groove 9 and extends outward, and the distance between the upper and lower inner walls of the movable limiting groove 9 is equal to the distance between the upper and lower inner walls of the shaft movable groove 8, and a limited connecting groove 12 is provided on the inner side wall of the parts mounting groove 5 corresponding to the position of the rotating fan blade 6, and the limited connecting groove 12 is connected with the corresponding position of the bearing movable groove 13, and the distance between the upper and lower inner walls of the shaft movable groove 8 is equal to the distance between the upper and lower inner walls of the limited connecting groove 12. The distance between them is equal, a fixed rack 10 is installed on the inner bottom wall of the part mounting groove 5, a spur gear 7 and a rotating fan blade 6 are installed at one end of the cleaning roller brush 3, and the spur gear 7 is located in the part mounting groove 5 and meshes with the fixed rack 10, and the rotating fan blade 6 is located outside the fixed film frame 1, and the rotating fan blade 6 is located on the fixed film frame 1 at one end away from the mounting base 2, and the rotating fan blade 6 is installed outside the fixed film frame 1 so that it can fully contact with the liquid, and the flow of the liquid will drive the rotating fan blade 6 to rotate. Since the fluctuation of the liquid is wavy and reciprocating, the rotation of the rotating fan blade 6 will also alternate between forward and reverse rotations.

[0031] During installation, the fixed membrane frame 1 is installed on the inner wall of the reactor through the threaded mounting holes on the mounting base 2. During the installation process, the fixed membrane frames 1 are staggered in sequence. One of any two adjacent fixed membrane frames 1 is installed on the inner bottom wall of the reactor, and the other fixed membrane frame 1 is installed on the inner top wall of the reactor. It is worth noting that the cleaning roller brushes 3 on the fixed membrane frames 1 are all installed at the liquid inlet end of the reactor, that is, the liquid flows from the end of the biofilm 4 that contacts the cleaning roller brush 3 to the end that does not contact the cleaning roller brush 3.

[0032] The liquid drives the rotating blades 6 to rotate in the process of flowing from the end of the biofilm 4 that contacts the cleaning roller brush 3 to the end that does not contact the cleaning roller brush 3. The rotating blades 6 drive the coaxially arranged spur gears 7 and the cleaning roller brush 3 to rotate during the rotation. The spur gears 7 are meshed with the fixed rack 10 to realize the movement of the cleaning roller brush 3. The cleaning roller brush 3 cleans the surface of the biofilm 4 while moving its position, and there is no need to discharge sewage during the cleaning process.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A membrane bioreactor for preventing membrane fouling, comprising a plurality of symmetrically arranged fixed membrane frames (1), characterized in that: One end of each of the fixed membrane frames (1) is fixedly connected to a mounting base (2), each of the mounting bases (2) is provided with a plurality of threaded mounting holes, and each of the fixed membrane frames (1) is mounted with a biofilm (4); A cleaning roller brush (3) is installed on each of the fixed film frames (1), and the cleaning roller brush (3) contacts one side of the biofilm (4); a part installation groove (5) is provided on the fixed film frame (1), and a fixed rack (10) is installed on the inner bottom wall of the part installation groove (5); a spur gear (7) and a rotating fan blade (6) are installed on one end of the cleaning roller brush (3), and the spur gear (7) is located in the part installation groove (5) and meshed with the fixed rack (10), and the rotating fan blade (6) is located outside the fixed film frame (1), and the rotating fan blade (6) is located on the end of the fixed film frame (1) away from the mounting base (2).

2. The membrane bioreactor for preventing membrane fouling according to claim 1, characterized in that: Two shaft movable grooves (8) and two bearing movable grooves (13) are symmetrically provided on the two inner side walls of the fixed film frame (1), and each shaft movable groove (8) is connected to a corresponding bearing movable groove (13), and both ends of the cleaning roller brush (3) pass through the corresponding shaft movable grooves (8) and are installed with rolling bearings (11), and each rolling bearing (11) is located in a corresponding bearing movable groove (13).

3. A membrane bioreactor for preventing membrane fouling according to claim 2, characterized in that: A limited position communication groove (12) is provided on the inner side wall of the part installation groove (5) corresponding to the position of the rotating blade (6), and the limited position communication groove (12) is connected to the corresponding bearing movable groove (13).

4. A membrane bioreactor for preventing membrane fouling according to claim 3, characterized in that: A movable limiting groove (9) is provided on one side of each of the fixed film frames (1), and the movable limiting groove (9) is connected to the part installation groove (5), and one end of the cleaning roller brush (3) passes through the movable limiting groove (9) and extends outward.

5. The membrane bioreactor for preventing membrane fouling according to claim 2, characterized in that: The distance between the upper and lower inner walls of the bearing movable groove (13) is equal to the diameter of the rolling bearing (11).

6. The membrane bioreactor for preventing membrane fouling according to claim 2, characterized in that: The distance between the two inner side walls of the bearing movable groove (13) is equal to the thickness of the rolling bearing (11).

7. The membrane bioreactor for preventing membrane fouling according to claim 4, characterized in that: The distance between the upper and lower inner walls of the shaft movable groove (8) is equal to the distance between the upper and lower inner walls of the position limiting connecting groove (12).

8. The membrane bioreactor for preventing membrane fouling according to claim 4, characterized in that: The distance between the upper and lower inner walls of the movable limiting groove (9) is equal to the distance between the upper and lower inner walls of the shaft movable groove (8).

9. The membrane bioreactor for preventing membrane fouling according to claim 2, characterized in that: The rolling bearing (11) is a deep groove ball bearing.

10. The membrane bioreactor for preventing membrane fouling according to claim 2, characterized in that: The length of the mounting base (2) is equal to the length of the fixed film frame (1), and the height of the mounting base (2) is greater than the height of the fixed film frame (1).

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