Membrane bioreactor for wastewater treatment

Abstract

The utility model relates to the technical field of membrane bioreactors, in particular to a membrane bioreactor for wastewater treatment, which comprises a mounting rack, a membrane bioreactor body for wastewater treatment is arranged on the mounting rack, the membrane bioreactor body consists of a plurality of vertical fiber membrane components, and the vertical fiber membrane components are arranged on the mounting rack. An air inlet assembly for accelerating the membrane separation rate of the membrane bioreactor body is arranged at the bottom of the mounting frame. According to the utility model, the gas inlet assembly is arranged below the membrane bioreactor, and the blades are impacted by using the pressure when gas is introduced, so that the gas outlet pipe is driven to swing intermittently, and the gas discharged from the gas outlet pipe impacts the lower part of the vertical fiber membrane assembly in a swinging manner; by means of the arrangement, the lower portion of the vertical fiber membrane assembly can be impacted to reduce adhesion of impurities, liquid in the sedimentation tank can be stirred, the oxygen combination efficiency is improved, the vertical fiber membrane assembly impacted by air can further improve the membrane separation efficiency below the vertical fiber membrane assembly, and the cleaning frequency of follow-up maintenance personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane bioreactors, in particular to a membrane bioreactor for wastewater treatment. Background Art

[0002] Membrane bioreactor is an organic combination of membrane separation technology and biotechnology. It uses ultrafiltration or microfiltration membrane separation technology to replace the secondary sedimentation tank and conventional filtration unit of the traditional activated sludge method, so that the hydraulic retention time and sludge age are completely separated. Its efficient solid-liquid separation ability makes the effluent water quality good, the suspended matter and turbidity are close to zero, and it can intercept biological pollutants such as Escherichia coli. The effluent can be directly reused after treatment. The effluent water quality is significantly better than that of traditional sewage treatment process. It is an efficient and economical sewage resource technology.

[0003] The membrane components of the existing membrane bioreactors are divided into hollow fiber membrane element type and flat membrane element type. For the hollow fiber membrane element type, since the suspended matter in the reaction tank is mostly filled in the lower part of the tank, this causes the lower part of the vertical bidirectional hollow fiber membrane component to be wrapped with more impurities after long-term use, which in turn affects its membrane separation efficiency. In order to avoid this situation, maintenance personnel are required to regularly maintain and clean it. For this purpose, a membrane bioreactor for wastewater treatment is proposed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a membrane bioreactor for wastewater treatment, which solves the technical problem that impurities are easily attached to the lower part of the membrane bioreactor.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a membrane bioreactor for wastewater treatment, comprising a mounting frame, on which a membrane bioreactor body for treating wastewater is provided, the membrane bioreactor body being composed of a plurality of vertical fiber membrane assemblies, and an air intake assembly for accelerating the membrane separation rate of the membrane bioreactor body being provided at the bottom of the mounting frame;

[0006] The air intake assembly includes two shells arranged on a mounting frame, an air intake pipe is rotatably provided between the two shells, a plurality of air outlet pipes are connected to the air intake pipe, and a one-way valve is provided in the air outlet pipe, and a driving assembly for driving the air intake pipe to rotate so as to drive the air outlet pipe to swing is provided on one side of the shell.

[0007] Preferably, the driving assembly comprises an air intake shell arranged on one side of the housing, a rotating shaft is rotatably arranged in the air intake shell, a plurality of blades are arranged on the rotating shaft, an air intake pipe and a telescopic connecting pipe are arranged on the air intake shell, and a terminal end of the telescopic connecting pipe is connected to the inside of the air intake pipe;

[0008] The rotating shaft is provided with a driving turntable at one end located inside the shell, the driving turntable is provided with a convex block, a sliding plate is slidably provided inside the shell, a driving block is provided on the sliding plate, a rectangular groove is opened on the driving block, and the convex block is slidably provided in the rectangular groove;

[0009] The air inlet pipe is provided with a driven gear at one end located inside the shell, and the sliding plate is also provided with a driving rack, and the driven gear and the driving rack are meshed with each other.

[0010] Preferably, the air inlet shell is provided with an air inlet and an air outlet for use with the air inlet pipe and the telescopic connecting pipe.

[0011] Preferably, a plurality of rectangular limiting strips are provided on the inner wall of the shell, and a rectangular groove for cooperating with the rectangular limiting strips is provided on the sliding plate.

[0012] Preferably, the plurality of vertical fiber membrane components are arranged in two rows, with five components in each row.

[0013] Preferably, the spacing between two adjacent air outlet pipes is equal to the spacing between two adjacent vertical fiber membrane assemblies, and the air outlet pipe is arranged between the two vertical fiber membrane assemblies.

[0014] Preferably, the swing angle of the air outlet pipe is between -30° and 30°.

[0015] By means of the above technical solution, the utility model provides a membrane bioreactor for wastewater treatment, which has at least the following beneficial effects:

[0016] 1. The utility model arranges an air intake assembly under the membrane bioreactor, utilizes the pressure when the gas is introduced to impact the blades, thereby driving the outlet pipe to swing intermittently, and the gas discharged from the outlet pipe then swings and impacts the bottom of the vertical fiber membrane assembly. This arrangement can not only impact the bottom of the vertical fiber membrane assembly to reduce the adhesion of impurities, but also stir the liquid in the sedimentation tank to improve the oxygen combination efficiency. The vertical fiber membrane assembly impacted by the air can also improve the membrane separation efficiency below it and reduce the cleaning frequency of subsequent maintenance personnel.

[0017] 2. The utility model drives the turntable to rotate by gas impacting the blades, thereby driving the sliding plate to move back and forth, and the reciprocating movement of the sliding plate further drives the intermittent swing of the outlet pipe, ultimately achieving the swinging discharge of gas. The entire process does not require additional power from the outside, and only uses the pressure of the gas introduced to drive the entire component to work, effectively increasing the application scenarios of the membrane bioreactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the appearance structure of the membrane bioreactor of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the air intake assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the air inlet pipe and the air outlet pipe of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the housing of the utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the air intake housing of the utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of the air intake assembly of the utility model.

[0025] In the figure: 1, mounting frame; 2, membrane bioreactor body; 201, vertical fiber membrane assembly; 3, air inlet assembly; 301, shell; 302, air inlet pipe; 303, air outlet pipe; 304, air inlet shell; 305, rotating shaft; 306, blades; 307, air inlet pipe; 308, telescopic connecting pipe; 309, driving turntable; 3091, bump; 310, sliding plate; 311, driving block; 312, driven gear; 313, driving rack. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] Please refer to Figure 1-Figure 3 A membrane bioreactor for wastewater treatment comprises a mounting frame 1, on which a membrane bioreactor body 2 for treating wastewater is arranged, the membrane bioreactor body 2 is composed of a plurality of vertical fiber membrane assemblies 201, an air inlet assembly 3 for accelerating the membrane separation rate of the membrane bioreactor body 2 is arranged at the bottom of the mounting frame 1, and the plurality of vertical fiber membrane assemblies 201 are symmetrically distributed as a whole;

[0029] The air intake assembly 3 includes two shells 301 fixed on the mounting frame 1, an air intake pipe 302 is rotatably provided between the two shells 301, a plurality of air outlet pipes 303 are evenly distributed and fixed on the air intake pipe 302, the plurality of air outlet pipes 303 are interconnected with the inside of the air intake pipe 302, and a one-way valve is provided in the air outlet pipe 303, and a driving assembly for driving the air outlet pipe 303 to swing is provided on one side of the shell 301.

[0030] Furthermore, the plurality of vertical fiber membrane assemblies 201 are arranged in two rows, with five in each row. Ten vertical fiber membrane assemblies 201 are fixedly arranged in the entire mounting frame 1. The arrangement of five in each row can not only improve the working efficiency of the air intake assembly 3, but also ensure the normal membrane separation.

[0031] Furthermore, the spacing between two adjacent air outlet pipes 303 is equal to the spacing between two adjacent vertical fiber membrane assemblies 201, and the air outlet pipe 303 is arranged between the two vertical fiber membrane assemblies 201. Only when the air outlet pipe 303 is arranged between the two vertical fiber membrane assemblies 201 can the function of utilizing air to impact the bottom of the vertical fiber membrane assemblies 201 be played, and the swinging air inlet pipe 302 can impact the two vertical fiber membrane assemblies 201 within one working cycle.

[0032] From the above, it can be seen that after being driven by the driving component, the outlet pipe 303 can be driven to swing intermittently in the vertical plane, and then the air discharged through the outlet pipe 303 can be swung and discharged in the sedimentation tank, and the discharged air can directly impact the bottom of the multiple vertical fiber membrane components 201. To a certain extent, the difficulty of impurities adhering to the bottom of the multiple vertical fiber membrane components 201 impacted by the air increases, thereby reducing the efficiency of impurity adhesion. At the same time, the discharged air can stir the liquid in the sedimentation tank. The cleaned multiple vertical fiber membrane components 201 can accelerate the efficiency of water flow entering the fiber membrane, thereby improving the membrane separation efficiency of the multiple vertical fiber membrane components 201.

[0033] Embodiment 2

[0034] Please refer to Figure 2-Figure 6 This embodiment is basically the same as the first embodiment. This embodiment is made on the basis of the first embodiment and has the same beneficial effects as the first embodiment. The same parts can be referred to each other and will not be described in detail here.

[0035] As a further technical solution of this embodiment, the driving assembly includes an air intake shell 304 fixedly arranged on one side of the housing 301, a rotating shaft 305 is rotatably arranged in the air intake shell 304, a plurality of blades 306 are fixedly arranged on the rotating shaft 305, an air intake pipe 307 and a telescopic connecting pipe 308 are symmetrically arranged on the air intake shell 304, and the end of the telescopic connecting pipe 308 is mutually communicated with the inside of the air intake pipe 302;

[0036] A driving disc 309 is fixedly provided at one end of the rotating shaft 305 located inside the housing 301, and a convex block 3091 is fixedly provided on the driving disc 309. A sliding plate 310 is slidably provided inside the housing 301, and a driving block 311 is fixedly provided on the sliding plate 310. A rectangular groove is formed on the driving block 311, and the convex block 3091 is slidably provided in the rectangular groove.

[0037] A driven gear 312 is fixedly provided at one end of the air inlet pipe 302 located inside the housing 301 , and a driving rack 313 is also provided on the sliding plate 310 . The driven gear 312 and the driving rack 313 are meshed with each other.

[0038] Furthermore, the air inlet shell 304 is provided with an air inlet and an air outlet for use with the air inlet pipe 307 and the telescopic connecting pipe 308, and the air inlet and the air outlet are symmetrically arranged.

[0039] Furthermore, a plurality of rectangular limiting strips are fixedly provided on the inner wall of the housing 301 , and a rectangular groove for cooperating with the rectangular limiting strips is provided on the sliding plate 310 .

[0040] Furthermore, the swing angle of the air outlet pipe 303 is between -30° and 30°, which allows the air to impact the middle of the vertical fiber membrane assembly 201 and the bottom of the vertical fiber membrane assembly 201 .

[0041] As can be seen from the above, the compressed air from the air inlet pipe 307 will first enter the air inlet shell 304. Due to the eccentric setting of the air inlet pipe 307, the compressed air will first impact the multiple blades 306 on the rotating shaft 305, further causing the rotating shaft 305 to rotate. After the compressed gas moves 3 / 4 of a circle in the air inlet shell 304, it will be discharged from the air inlet shell 304 through the telescopic connecting pipe 308. The air entering the telescopic connecting pipe 308 will then enter the inside of the air inlet pipe 302, and finally be discharged from the air outlet pipe 303 to the sedimentation tank. At this time, the gas flow route in the entire device;

[0042] When the rotating shaft 305 rotates, the rotating shaft 305 can drive the driving turntable 309 to rotate, and further drive the protrusion 3091 to move in the vertical plane. Since the protrusion 3091 slides in the rectangular groove of the driving block 311, the driving block 311 moves back and forth in the horizontal plane. Because the driving block 311 is fixedly connected to the sliding plate 310, the driving rack 313 on the sliding plate 310 continuously drives the driven gear 312 to rotate, and finally the intermittent rotation of the air inlet pipe 302 is realized. Multiple air outlet pipes 303 are fixed on the air inlet pipe 302, resulting in the intermittent swing of multiple air outlet pipes 303 in the sedimentation tank. The air discharged through the air outlet pipe 303 impacts the bottom of the vertical fiber membrane assembly 201, thereby reducing the probability of adhesion.

[0043] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the above embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A membrane bioreactor for wastewater treatment, comprising a mounting frame (1), characterized in that: A membrane bioreactor body (2) for treating wastewater is provided on the mounting frame (1), the membrane bioreactor body (2) being composed of a plurality of vertical fiber membrane assemblies (201), and an air inlet assembly (3) for accelerating the membrane separation rate of the membrane bioreactor body (2) is provided at the bottom of the mounting frame (1); The air intake assembly (3) comprises two shells (301) arranged on the mounting frame (1); an air intake pipe (302) is rotatably arranged between the two shells (301); a plurality of air outlet pipes (303) are connected to the air intake pipe (302); and a one-way valve is arranged in the air outlet pipe (303); and a driving assembly for driving the air intake pipe (302) to rotate so as to drive the air outlet pipe (303) to swing is arranged on one side of the shell (301).

2. A membrane bioreactor for wastewater treatment according to claim 1, characterized in that: The driving assembly comprises an air intake shell (304) arranged on one side of the housing (301), a rotating shaft (305) is rotatably arranged in the air intake shell (304), a plurality of blades (306) are arranged on the rotating shaft (305), an air intake pipe (307) and a telescopic connecting pipe (308) are arranged on the air intake shell (304), and a terminal end of the telescopic connecting pipe (308) is mutually connected with the inside of the air intake pipe (302); The rotating shaft (305) is provided with a driving disc (309) at one end located inside the housing (301), and a convex block (3091) is provided on the driving disc (309). A sliding plate (310) is slidably provided inside the housing (301), and a driving block (311) is provided on the sliding plate (310). A rectangular groove is provided on the driving block (311), and the convex block (3091) is slidably provided in the rectangular groove. The air intake pipe (302) is provided with a driven gear (312) at one end located inside the housing (301), and the sliding plate (310) is also provided with a driving rack (313), and the driven gear (312) and the driving rack (313) are meshed with each other.

3. A membrane bioreactor for wastewater treatment according to claim 2, characterized in that: The air inlet shell (304) is provided with an air inlet and an air outlet for use with the air inlet pipe (307) and the telescopic connecting pipe (308).

4. A membrane bioreactor for wastewater treatment according to claim 2, characterized in that: The inner wall of the housing (301) is provided with a plurality of rectangular limiting strips, and the sliding plate (310) is provided with rectangular grooves used in conjunction with the rectangular limiting strips.

5. A membrane bioreactor for wastewater treatment according to claim 1, characterized in that: The plurality of vertical fiber membrane components (201) are arranged in two rows, with five components in each row.

6. A membrane bioreactor for wastewater treatment according to claim 2, characterized in that: The spacing between two adjacent air outlet pipes (303) is equal to the spacing between two adjacent vertical fiber membrane assemblies (201), and the air outlet pipe (303) is arranged between the two vertical fiber membrane assemblies (201).

7. A membrane bioreactor for wastewater treatment according to claim 2, characterized in that: The swing angle of the air outlet pipe (303) is between -30° and 30°.

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