Moving bed biological membrane reaction device

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a moving bed biofilm reaction device, the moving bed biofilm reaction device comprises an aeration tank, a screen mesh and a scraping assembly, the aeration tank is provided with a working cavity, the working cavity is used for accommodating sewage and filler, a water outlet is formed in the cavity wall of one side of the working cavity, the screen mesh is connected to the aeration tank and covers the water outlet, the scraping assembly is connected to the aeration tank, and the scraping assembly is connected to the aeration tank. The scraping assembly is used for scraping the filler accumulated on the screen. The screen is used for preventing loss of the filler in the working cavity, and the scraping assembly is arranged and used for pushing the filler which is accumulated in the water outlet and blocks the screen out of the water outlet, so that the filler is in full contact with sewage, the utilization rate of the filler is increased, and the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a moving bed biofilm reaction device. Background Art

[0002] The MBBR (Moving-Bed Biofilm Reactor) process utilizes the fundamental principles of the biofilm process. By adding a certain amount of suspended carriers to the reactor, the biomass and biodiversity within the reactor are increased, thereby improving the reactor's treatment efficiency. Because the carrier density is close to that of water, it completely mixes with the water during aeration, creating a three-phase environment for microbial growth: gas, liquid, and solid. The collision and shearing action of the carriers in the water further refines the air bubbles, increasing oxygen utilization.

[0003] Aeration tanks are commonly used equipment in sewage treatment. An outlet is set on the side wall of the aeration tank to discharge the treated sewage. In order to prevent the loss of filler, a screen is often set at the outlet for filtering. There is a situation where the filler accumulates at the outlet and causes the screen to be blocked. Utility Model Content

[0004] In order to reduce the possibility of filler accumulation at the water outlet, increase the contact area between the biological filler and sewage, and improve the sewage treatment efficiency, the present application provides a method.

[0005] The present application provides a moving bed biofilm reactor that adopts the following technical solution:

[0006] A moving bed biofilm reaction device includes an aeration tank, a screen and a scraping assembly. The aeration tank is provided with a working chamber, which is used to accommodate sewage and fillers. A water outlet is provided on the cavity wall on one side of the working chamber. The screen is connected to the aeration tank and covers the water outlet. The scraping assembly is connected to the aeration tank and is used to scrape off the fillers accumulated on the screen.

[0007] By adopting the above technical solution, the screen is used to prevent the filler in the working chamber from being lost, and a scraping component is provided to push the filler accumulated in the water outlet and blocking the screen out of the water outlet, so that the filler is in full contact with the sewage, thereby improving the utilization rate of the filler and the sewage treatment efficiency.

[0008] Preferably, the bottom of the working chamber is connected to a partition, one end of the partition along the length direction of the partition is connected to the wall of the working chamber, a water outlet is left between the other end of the partition and the wall of the working chamber, and the water outlet is located on the side of the partition away from the water outlet.

[0009] By adopting the above technical solution, a partition is set, and a water outlet is left between the end of the partition away from the water outlet and the wall of the working chamber, thereby extending the flow path of the sewage in the aeration tank, improving space utilization, and fully contacting the filler during the flow of sewage, thereby improving the utilization rate of the filler and improving the sewage treatment efficiency.

[0010] Preferably, there are a plurality of water outlets, which are spaced apart along the length direction of the partition, and the number of the screens and scraping assemblies is the same as the number of the water outlets and corresponds one to one.

[0011] By adopting the above technical solution, multiple water outlets are set to improve the water outlet efficiency of the aeration tank, facilitate the rapid discharge of treated sewage in the working chamber, improve work efficiency, and when any water outlet is blocked and cannot be used, water can be discharged through other water outlets, thereby increasing the service life of the device.

[0012] Preferably, the scraping assembly includes a scraping motor, a first rotating shaft and a stirring blade. The first rotating shaft is rotatably embedded in the working chamber, the rotation axis of the first rotating shaft is vertical, the scraping motor is connected to the aeration tank, the scraping motor is used to drive the first rotating shaft to rotate, and the stirring blade is connected to the outer periphery of the first rotating shaft.

[0013] By adopting the above technical solution, the scraping motor works, drives the first rotating shaft to rotate, drives the stirring blade to rotate, and brings the filler accumulated on the surface of the screen out of the water outlet, which helps the scraping mechanism to stably clean the screen and the water outlet.

[0014] Preferably, the stirring blade is spiral-shaped.

[0015] By adopting the above technical solution, the stirring blade is spiral-shaped, which reduces the resistance of sewage to the stirring blade, reduces the energy consumption of the scraping motor, and reduces production costs.

[0016] Preferably, the scraping assembly further comprises a brush, which is connected to a side of the stirring blade away from the first rotating shaft, and the side of the brush away from the first rotating shaft is used to abut against the screen.

[0017] By adopting the above technical solution, a brush is provided, and the brush has a certain deformation ability. When the brush abuts against the screen, the brush deforms and scrapes out the filler embedded in the mesh of the screen, thereby improving the scraping efficiency of the scraping assembly, reducing the possibility of collision between the scraping assembly and the screen, resulting in damage to the screen or the scraping assembly, and increasing the service life of the screen and the scraping assembly.

[0018] Preferably, a mounting groove is provided on the side of the stirring blade away from the rotating shaft; one side of the brush is embedded in the mounting groove; a fixing hole is provided on the wall of the mounting groove; the fixing hole is used for a bolt to pass through and press against the side wall of the brush.

[0019] By adopting the above technical solution, an installation groove is provided to facilitate the insertion of the brush, thereby improving the stability of the connection between the brush and the stirring blade. A fixing hole is provided on the wall of the installation groove, which is used for the bolt to pass through and then press against the side wall of the brush, thereby facilitating the installation and replacement of the brush.

[0020] Preferably, a stirring mechanism is further included, and the stirring mechanism is located on a side of the partition away from the water outlet, and the stirring mechanism is used to drive the sewage in the working chamber to flow in a direction away from the water outlet.

[0021] By adopting the above technical solution, a stirring mechanism is provided, which pushes the sewage in the working chamber in a direction away from the water outlet, so that the filler pushed out of the water outlet by the scraping component flows in a direction away from the water outlet along with the sewage, thereby increasing the contact time between the filler and the sewage, improving the utilization rate of the filler, and improving the sewage treatment efficiency.

[0022] Preferably, it further comprises an aeration mechanism, which is embedded in the working chamber.

[0023] By adopting the above technical solution, the aeration mechanism is used to generate bubbles, driving the sewage in the working chamber to be disturbed vertically, improving the mixing effect of sewage and filler, increasing the contact area between sewage and filler, improving the utilization rate of filler, and improving sewage treatment efficiency.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The screen is used to prevent the filler in the working chamber from being lost. A scraping assembly is provided to push the filler that has accumulated in the water outlet and blocked the screen out of the water outlet, so that the filler is fully in contact with the sewage, thereby improving the utilization rate of the filler and the sewage treatment efficiency;

[0026] 2. A partition is set up, and a water outlet is left between the end of the partition away from the water outlet and the wall of the working chamber to extend the flow path of sewage in the aeration tank, improve space utilization, and fully contact the filler during the flow of sewage, thereby improving the utilization rate of the filler and the sewage treatment efficiency;

[0027] 3. A stirring mechanism is provided to push the sewage in the working chamber away from the water outlet, so that the filler pushed out from the water outlet by the scraping component flows away from the water outlet along with the sewage, thereby increasing the contact time between the filler and the sewage, improving the utilization rate of the filler, and improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of a moving bed biofilm reactor.

[0029] Figure 2 It is a partial cross-sectional view of a moving bed biofilm reactor.

[0030] Figure 3 It is a schematic diagram of the exploded structure of the scraping component.

[0031] Description of reference numerals:

[0032] 1. Aeration tank; 11. Working chamber; 12. Water outlet; 13. Baffle; 14. Water outlet; 15. Mounting plate; 16. Mounting seat;

[0033] 2. Screen;

[0034] 3. Scraping mechanism; 31. Scraping assembly; 311. Scraping motor; 312. First rotating shaft; 313. Stirring blade; 3131. Mounting groove; 3132. Fixing hole; 314. Brush; 315. Connecting rod;

[0035] 4. Stirring mechanism; 41. Stirring motor; 42. Second rotating shaft; 43. Stirring blade;

[0036] 5. Aeration mechanism; 51. Air intake manifold; 52. Aeration pipe. DETAILED DESCRIPTION

[0037] The present application is further described in detail below with reference to the accompanying drawings.

[0038] Reference Figure 1 The present invention discloses a moving bed biofilm reactor comprising an aeration tank 1, with a working chamber 11 disposed at its upper end. The working chamber 11 is configured to accommodate sewage and filler. A partition 13 is fixedly connected to the bottom of the working chamber 11. The length of the partition 13 is parallel to the length of the aeration tank 1. One end of the partition 13 is fixedly connected to the wall of the working chamber 11, and a water outlet 14 is provided between the other end of the partition 13 and the wall of the working chamber 11.

[0039] A moving bed biofilm reaction device also includes a screen 2. A water outlet 12 is provided on the wall of the working chamber 11 along one side of the width direction of the aeration tank 1, and the water outlet 12 is connected to the outside. The water outlet 12 is located on the side of the partition 13 away from the water outlet 14. There are a plurality of water outlets 12, and the plurality of water outlets 12 are spaced apart along the length direction of the partition 13. In this embodiment, there are five water outlets 12, and the five water outlets 12 are evenly distributed along the length direction of the partition 13. The number of screens 2 is the same as the number of water outlets 12 and corresponds one to one. The screens 2 are embedded in the water outlets 12 and cover the water outlets 12.

[0040] Reference Figure 1 and Figure 2A moving bed biofilm reaction device also includes a scraping mechanism 3, which is used to scrape off the filler accumulated on the screen 2. The scraping mechanism 3 includes scraping components 31, and the number of scraping components 31 is the same as the number of screens 2 and corresponds one to one. A mounting plate 15 is fixedly connected to the cavity wall of the working chamber 11 on the side close to the water outlet 12, and the mounting plate 15 is located above the water outlet 12. The scraping component 31 includes a scraping motor 311, a first rotating shaft 312 and a stirring blade 313. The first rotating shaft 312 is rotatably embedded in the working chamber 11, and the rotation axis of the first rotating shaft 312 is vertical. The scraping motor 311 is connected to the mounting plate 15, and the scraping motor 311 is used to drive the first rotating shaft 312 to rotate. In this embodiment, the casing of the scraping motor 311 is fixedly connected to the upper end of the mounting plate 15, and the output shaft of the scraping motor 311 passes through the mounting plate 15 and is coaxially fixedly connected to the upper end of the first rotating shaft 312. The stirring blade 313 is coaxially fixedly connected to the outer periphery of the first rotating shaft 312. The stirring blade 313 is spiral-shaped. In this embodiment, the screen 2 is arc-shaped.

[0041] Reference Figure 2 and Figure 3 The scraping assembly 31 also includes a connecting rod 315. One end of the connecting rod 315 is fixedly connected to the outer periphery of the first rotating shaft 312, and the other end of the connecting rod 315 is fixedly connected to the side of the stirring blade 313 close to the first rotating shaft 312. The axis of the connecting rod 315 is perpendicular to the axis of the first rotating shaft 312 and is coplanar with the axis of the first rotating shaft 312. A plurality of connecting rods 315 are provided, and the plurality of connecting rods 315 are evenly distributed along the length of the stirring blade 313. In this embodiment, four connecting rods 315 are provided.

[0042] The scraping assembly 31 also includes a brush 314. A mounting groove 3131 is provided on the side of the stirring blade 313 away from the first rotating shaft 312. One side of the brush 314 is embedded in the mounting groove 3131. A fixing hole 3132 is provided on the side of the mounting groove 3131 away from the bottom of the working chamber 11. There are multiple fixing holes 3132, which are evenly distributed along the length of the stirring blade 313. The fixing holes 3132 are used to allow bolts to pass through and then press against the side wall of the brush 314. The side of the brush 314 away from the bottom of the mounting groove 3131 is used to abut against the screen 2.

[0043] Reference Figure 1 and Figure 2A moving bed biofilm reaction device also includes a stirring mechanism 4, which is located on the side of the partition 13 away from the water outlet 14. The stirring mechanism 4 is used to drive the sewage in the working chamber 11 to flow in the direction away from the water outlet 12. A mounting seat 16 is fixedly connected to the wall of the working chamber 11 on the side away from the water outlet 14 along the length direction of the aeration tank 1. The mounting seat 16 is located on the side of the partition 13 close to the water outlet 12. The stirring mechanism 4 includes a stirring motor 41, a second rotating shaft 42 and a stirring blade 43. The second rotating shaft 42 is rotatably embedded in the working chamber 11, and the rotation axis of the second rotating shaft 42 is vertical. The stirring motor 41 is connected to the mounting seat 16, and the stirring motor 41 is used to drive the second rotating shaft 42 to rotate. In this embodiment, the casing of the stirring motor 41 is fixedly connected to the upper end of the mounting seat 16, and the output shaft of the stirring motor 41 passes through the mounting seat 16 and is coaxially fixedly connected to the upper end of the second rotating shaft 42. One end of the stirring blade 43 is fixedly connected to the outer periphery of the second rotating shaft 42. There are a plurality of stirring blades 43, and the stirring blades 43 are evenly distributed around the circumference of the second rotating shaft 42. In this embodiment, there are three stirring blades 43.

[0044] A moving bed biofilm reactor also includes an aeration mechanism 5, which includes an air intake manifold 51 and an aeration pipe 52. The air intake manifold 51 is fixedly connected to the upper end of the aeration tank 1, and the length direction of the air intake manifold 51 is parallel to the width direction of the aeration tank 1. One end of the aeration pipe 52 is fixedly connected to the outer periphery of the air intake manifold 51, and the aeration pipe 52 is connected to the air intake manifold 51. The other end of the aeration pipe 52 extends into the working chamber 11. In this embodiment, the aeration pipe 52 is Z-shaped, and the side of the aeration pipe 52 away from the air intake manifold 51 is fixedly connected to the bottom of the working chamber 11. Two aeration pipes 52 are provided, and the two aeration pipes 52 are located on both sides of the partition 13, and the two aeration pipes 52 are spaced apart along the length direction of the air intake manifold 51.

[0045] The operating principle of the moving bed biofilm reactor according to the embodiment of the present application is as follows: the scraping motor 311 is in operation, driving the first rotating shaft 312 to rotate, driving the stirring blade 313 to rotate, driving the brush 314 to rotate, the brush 314 abutting the screen 2, and pushing the filler on the surface of the screen 2 and in the water outlet 12 out of the water outlet 12. The stirring motor 41 is in operation, driving the second rotating shaft 42 to rotate, driving the stirring blade 43 to rotate, driving the sewage in the working chamber 11 to flow toward the side away from the water outlet 12, and driving the filler to flow in the direction away from the water outlet 12.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A moving bed biofilm reactor, characterized in that: The invention comprises an aeration tank (1), a screen (2) and a scraping assembly (31); the aeration tank (1) is provided with a working chamber (11); the working chamber (11) is used to accommodate sewage and fillers; a water outlet (12) is provided on a wall of one side of the working chamber (11); the screen (2) is connected to the aeration tank (1) and covers the water outlet (12); the scraping assembly (31) is connected to the aeration tank (1); the scraping assembly (31) is used to scrape off fillers accumulated on the screen (2); The scraping assembly (31) comprises a scraping motor (311), a first rotating shaft (312) and a stirring blade (313); the first rotating shaft (312) is rotatably embedded in the working chamber (11); the rotation axis of the first rotating shaft (312) is vertical; the scraping motor (311) is connected to the aeration tank (1); the scraping motor (311) is used to drive the first rotating shaft (312) to rotate; the stirring blade (313) is connected to the outer periphery of the first rotating shaft (312); The stirring blade (313) is spiral-shaped; The scraping assembly (31) further comprises a brush (314); the brush (314) is connected to a side of the stirring blade (313) away from the first rotating shaft (312); the side of the brush (314) away from the first rotating shaft (312) is used to abut against the screen (2).

2. The moving bed biofilm reactor according to claim 1, characterized in that: The bottom of the working chamber (11) is connected to a partition (13); one end of the partition (13) along the length direction of the partition (13) is connected to the wall of the working chamber (11); a water outlet (14) is left between the other end of the partition (13) and the wall of the working chamber (11); and the water outlet (12) is located on a side of the partition (13) away from the water outlet (14).

3. The moving bed biofilm reactor according to claim 2, characterized in that: There are a plurality of water outlets (12); the plurality of water outlets (12) are spaced apart along the length direction of the partition (13); the number of the screens (2) and the scraping assemblies (31) is the same as the number of the water outlets (12) and corresponds one to one.

4. The moving bed biofilm reactor according to claim 1, characterized in that: A mounting groove (3131) is provided on a side of the stirring blade (313) away from the rotating shaft; one side of the brush (314) is embedded in the mounting groove (3131); a fixing hole (3132) is provided on the wall of the mounting groove (3131); the fixing hole (3132) is used for a bolt to pass through and press against the side wall of the brush (314).

5. The moving bed biofilm reactor according to claim 2, characterized in that: It also includes a stirring mechanism (4); the stirring mechanism (4) is located on a side of the partition (13) away from the water outlet (14); the stirring mechanism (4) is used to drive the sewage in the working chamber (11) to flow in a direction away from the water outlet (12).

6. The moving bed biofilm reactor according to claim 1, characterized in that: It also includes an aeration mechanism (5); the aeration mechanism (5) is embedded in the working chamber (11).

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