A quick fluidization type MBBR-MBR reactor

Abstract

The scheme provides a quick fluidization type MBBR-MBR reactor, which comprises a reactor body with a cylindrical reaction chamber; an aeration pipe arranged in a ring shape and arranged at the bottom of the reaction chamber and provided with upward aeration holes; a flow guide plate in a disc shape, which is arranged obliquely in the middle upper part of the reaction chamber, and provided with flow guide holes on the flow guide plate, and which is gap-fitted with the reaction chamber; a membrane assembly installed above the flow guide plate; and an intercepting assembly arranged between the flow guide plate and the membrane assembly, which comprises an intercepting net and an aeration branch pipe arranged below the intercepting net and provided with scouring holes facing the intercepting net. The scheme accelerates the fluidization effect by arranging the oblique flow guide plate, reduces the thickness of the suspended filler, arranges the intercepting net and the aeration branch pipe below the membrane assembly, blows the gas in the aeration branch pipe to the intercepting net to realize self-cleaning, and forms a gas blade on the membrane by the gas in the aeration branch pipe, so as to clean the pollution on the membrane and ensure the single cycle life of the membrane assembly.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and more specifically, to a rapid fluidized MBBR-MBR reactor. Background Technology

[0002] Moving bed biofilm reactors (MBBR) and membrane bioreactors (MBR), as two highly efficient wastewater treatment technologies, have been frequently combined in recent years to achieve both high volumetric loading and high-quality effluent. However, the actual operation of existing MBBR-MBR combined processes presents the following problems: During MBBR operation, the biofilm periodically detaches, generating a large amount of flocs and tiny debris. In traditional MBBR-MBR combined structures, without effective transitional isolation measures, these detached materials easily enter the MBR zone with the water flow, adhering to the membrane surface or clogging the membrane pores, significantly exacerbating membrane fouling. Although some schemes add a screen between the two zones, this screen is easily clogged by packing debris and cannot prevent fine suspended solids from penetrating, resulting in frequent cleaning or offline regeneration of the MBR membrane modules. The single-cycle water treatment capacity is limited, making it difficult to meet the needs of continuous use. Utility Model Content

[0003] The present invention aims to provide a rapid fluidized MBBR-MBR reactor to solve the problem of easy fouling of the membrane surface in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a rapid fluidized bed MBBR-MBR reactor is provided, comprising: a reactor body, vertically arranged, having a cylindrical reaction chamber; an aeration pipe, annularly arranged, located at the bottom of the reaction chamber, with upward-facing aeration holes on the aeration pipe; a guide plate, disc-shaped, inclinedly arranged in the upper middle part of the reaction chamber, with guide holes on the guide plate, and an annular gap between the guide plate and the inner wall of the reaction chamber; a membrane module, mounted above the guide plate; and an interception assembly, disposed between the guide plate and the membrane module, the interception assembly including an interception net and an aeration branch pipe disposed below the interception net, the aeration branch pipe having flushing holes facing the interception net.

[0005] Furthermore, it also includes an air supply pipe, the upstream of which is connected to an aeration pipe, and the downstream of which is connected to an aeration branch pipe.

[0006] Furthermore, the aeration branch pipe includes a main pipe and multiple branch pipes. The multiple branch pipes are perpendicular to the outer periphery of the main pipe and are connected to the interior of the main pipe. The main pipe is connected downstream of the air supply pipe.

[0007] Furthermore, the aeration branch pipe is spiral-shaped, and one end of the aeration branch pipe near the cavity wall is connected to the downstream end of the air supply pipe.

[0008] Furthermore, the guide plate is concentrically arranged with the reactor body, and the effective flow area of ​​the plane where the guide plate is located is 25% to 55% of the cross-sectional area of ​​the reaction chamber.

[0009] Furthermore, the guide holes are arranged in a quincunx pattern on the guide plate, forming an angle of 5° to 30° between the guide plate and the horizontal plane.

[0010] Furthermore, the membrane module includes a support structure and a multilayer flat membrane connected between the support structures, the support structure being connected to the inner wall of the reaction chamber.

[0011] Furthermore, a crossbeam is connected above the support frame, and a water inlet hole is provided on the crossbeam. A filter screen is provided on the side of the water inlet hole facing the membrane module. A water pump is provided on the reactor body, and the water inlet hole and the water pump are connected by a water collection pipe.

[0012] In the technical solution of this utility model, by setting an inclined guide plate to accelerate fluidization, the thickness of the suspended packing can be reduced, and the distance between the suspended packing and the membrane module can be increased, keeping the membrane module away from the source of pollution. At the same time, an intercepting net is set below the membrane module to intercept the packing and biofilm debris. An aeration branch pipe is set below the intercepting net. When the reactor is running, the gas in the aeration branch pipe is blown onto the intercepting net to prevent the intercepting net from becoming blocked, achieving self-cleaning and extending the service life of the intercepting net. After cleaning the intercepting net, the gas in the aeration branch pipe will form an air blade on the membrane to remove the pollution on the membrane, further reducing the degree of pollution on the membrane surface and ensuring the single cycle life of the membrane module. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0014] Figure 1 A schematic diagram of an embodiment of the rapid fluidized MBBR-MBR reactor according to the present invention is shown. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] Example 1

[0017] See also Figure 1As shown in the figure, the rapid fluidized MBBR-MBR reactor in this embodiment includes: a reactor body 10, which is vertically arranged and has a cylindrical reaction chamber; an aeration pipe 20, which is arranged in an annular shape and is located at the bottom of the reaction chamber, with upward aeration holes on the aeration pipe 20; a guide plate 30, which is disc-shaped and is inclinedly arranged in the upper middle part of the reaction chamber, with guide holes on the guide plate 30, and an annular gap between the guide plate 30 and the inner wall of the reaction chamber; a membrane module, which is installed above the guide plate 30; and an interception assembly, which is located between the guide plate 30 and the membrane module, the interception assembly including an interception net 51 and an aeration branch pipe 52 located below the interception net 51, with flushing holes on the aeration branch pipe 52 facing the interception net 51.

[0018] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: by setting the inclined guide plate 30 to accelerate the fluidization effect, the thickness of the suspended packing 70 can be reduced, the distance between the suspended packing 70 and the membrane module can be increased, and the membrane module can be kept away from the source of pollution. At the same time, an interception net 51 is set below the membrane module to intercept the packing and biofilm fragments. An aeration branch pipe 52 is set below the interception net 51. When the reactor is running, the gas in the aeration branch pipe 52 is blown onto the interception net 51 to prevent the interception net 51 from becoming blocked, achieve self-cleaning, and extend the service life of the interception net 51. After cleaning the interception net 51, the gas in the aeration branch pipe 52 will form an air blade on the membrane, and use the upward airflow to remove the pollution on the membrane, further reducing the degree of pollution on the membrane surface and ensuring the single cycle life of the membrane module.

[0019] like Figure 1As shown, in this embodiment, the guide plate 30, which is concentrically arranged with the reaction chamber, is tilted upwards at an angle of 5° to 30° around a certain horizontal diameter, resulting in a unilaterally high and unilaterally low tilt. This allows the upward water flow driven by the aeration pipe 20 to form a longer path on the high point side and a shorter path on the low point side. This breaks the symmetrical flow field, making it easier for gas to pass through the high point side when the aeration pipe 20 delivers air upwards. This causes the liquid on the low point side to undergo a compensatory descent, forming a circulation and effectively driving the packing material to move, resulting in rapid fluidization. The guide holes on the guide plate 30 are strip-shaped water passages, and the centers of multiple guide holes are distributed in a quincunx pattern to improve the uniformity of water distribution. This arrangement not only ensures the uniform distribution of water flow but also effectively prevents the packing material from accumulating on the surface of the guide plate 30. Meanwhile, the tilt angle of the guide plate 30 optimizes hydraulic conditions, allowing the packing material to form a spiral upward flow pattern under aeration, enhancing turbulence and improving oxygen transfer efficiency and pollutant diffusion rate. When the size of the water passage hole is 10mm*50mm, water flow and fine suspended matter can pass through, but the packing material (packing material size greater than 20mm) is prevented from floating. The distance between the guide plate 30 and the inner wall of the reaction chamber can also be controlled within the range of 5mm to 15mm to prevent the packing material from passing through.

[0020] The membrane module in this embodiment includes a support 41 and a multilayer flat membrane 42 connected to the support 41. The support 41 can be fixedly connected to the inner wall of the reaction chamber by a connector. An intercepting net 51 is disposed between the membrane module and the guide plate 30, and the size of the intercepting net 51 is adapted to the size of the guide plate 30. An aeration branch pipe 52 is disposed below the intercepting net 51. The aeration branch pipe 52 includes a main pipe and multiple branch pipes. The multiple branch pipes are vertically connected to the outer periphery of the main pipe and communicate with the interior of the main pipe. A flushing hole facing the intercepting net 51 is opened on both the main pipe and the branch pipes. A gas supply pipe 80 is disposed between the aeration branch pipe 52 and the aeration pipe 20. The aeration pipe 20 is disposed upstream of the gas supply pipe 80, and the downstream of the gas supply pipe 80 communicates with the aeration branch pipe 52. The gas supply pipe 80 is disposed on the side where the lowest point of the guide plate 30 is located, and is arranged along the inner wall of the reactor to avoid interfering with the flow field of the main reaction zone.

[0021] In this embodiment, the packing material is added in a single batch, eliminating the need for partial addition. The synergistic effect of the annular aeration and the guide plate 30 ensures uniform distribution of the packing material within the reaction chamber, preventing localized accumulation. In this embodiment, the suspended packing material 70 is mainly distributed in the area between the aeration pipe 20 and the guide plate 30.

[0022] A crossbeam 43 is also provided on the support 41, and a water inlet hole is provided on the crossbeam 43. A filter screen is provided at the bottom of the water inlet hole, and a water collection pipe is connected to the upper end of the water inlet hole. A water pump 60 is also provided on the reactor body 10. The inlet of the water pump 60 is connected to the other end of the water collection pipe, and the outlet is connected to the outlet of the reactor body 10.

[0023] Example 2

[0024] The difference between Embodiment 2 and Embodiment 1 lies in the arrangement of the aeration branch pipe. In this embodiment, the aeration branch pipe 52 is spirally arranged, with one end of the aeration branch pipe 52 near the cavity wall connected to the downstream of the air supply pipe 80. A flushing hole facing the intercepting mesh 51 is provided on the aeration branch pipe 52, and a timer valve is also provided downstream of the air supply pipe 80.

[0025] In this embodiment, the aeration branch pipe 52 is a single pipe, and its spiral shape is adapted to the circular shape of both the interceptor net 51 and the membrane. This allows the gas in the flushing holes to have a larger flushing area on the interceptor net 51, thus cleaning it more effectively. Simultaneously, the timing valve ensures that the cleaning of the interceptor net 51 and membrane by the aeration branch pipe 52 is intermittent. This discontinuous aeration generates stronger instantaneous water flow disturbance, which is more effective at removing loose contaminants than constant aeration.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid fluidized bed MBBR-MBR reactor, characterized in that, include: The reactor body (10) is vertically arranged and has a cylindrical reaction chamber. An aeration pipe (20) is arranged in a ring shape. The aeration pipe (20) is located at the bottom of the reaction chamber. An upward aeration hole is provided on the aeration pipe (20). The guide plate (30) is disc-shaped and is inclinedly disposed in the upper middle part of the reaction chamber. The guide plate (30) has a guide hole and an annular gap is left between the guide plate (30) and the inner wall of the reaction chamber. A membrane module is mounted above the flow guide plate (30); An interception assembly is disposed between the guide plate (30) and the membrane assembly. The interception assembly includes an interception net (51) and an aeration branch pipe (52) disposed below the interception net (51). The aeration branch pipe (52) is provided with flushing holes facing the interception net (51).

2. The reactor according to claim 1, characterized in that, It also includes an air supply pipe (80), the upstream of which is connected to the aeration pipe (20), and the downstream of which is connected to the aeration branch pipe (52).

3. The reactor according to claim 2, characterized in that, The aeration branch pipe (52) includes a main pipe and multiple branch pipes. The multiple branch pipes are perpendicular to the outer periphery of the main pipe and communicate with the interior of the main pipe. The main pipe is connected downstream of the air supply pipe (80).

4. The reactor according to claim 2, characterized in that, The aeration branch pipe (52) is spiral-shaped, and one end of the aeration branch pipe (52) near the cavity wall is connected to the downstream of the air supply pipe (80).

5. The reactor according to claim 1, characterized in that, The guide plate (30) is concentrically arranged with the reactor body (10), and the effective flow area of ​​the plane where the guide plate (30) is located is 25% to 55% of the cross-sectional area of ​​the reaction chamber.

6. The reactor according to claim 1, characterized in that, The guide holes are arranged in a quincunx pattern on the guide plate (30), and the guide plate (30) forms an angle of 5° to 30° with the horizontal plane.

7. The reactor according to claim 1, characterized in that, The membrane assembly includes a support (41) and a multilayer flat membrane (42) connected between the support (41), the support (41) being connected to the inner wall of the reaction chamber.

8. The reactor according to claim 7, characterized in that, A crossbeam (43) is connected above the support (41). A water inlet hole is provided on the crossbeam (43). A filter screen is provided on the side of the water inlet hole facing the membrane module. A water pump (60) is provided on the reactor body (10). The water inlet hole and the water pump (60) are connected by a water collection pipe.

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