MABR (Membrane Aerated Baffled Reactor) membrane aeration reaction system capable of adaptively adjusting thickness of biological membrane layer

Abstract

The utility model discloses an MABR (Membrane Aerated Baffled Reactor) membrane aeration reaction system capable of adaptively adjusting the thickness of a biological membrane layer, which comprises an MABR membrane bioreactor, a membrane pool and a guide rail, and the MABR membrane bioreactor is movably limited on the guide rail; the MABR membrane bioreactor comprises a membrane frame and a membrane assembly, the upper end of the membrane frame is provided with an MABR membrane gas inlet, an MABR membrane tail gas outlet, an aeration gas inlet and a fixing pin, the fixing pin is connected with a valve of an aeration gas inlet valve through a control connecting rod, the membrane frame is further provided with limiting claws and a pulse aeration box, the limiting claws are located on the two sides of the membrane frame, and the pulse aeration box is connected with the limiting claws. The guide rail is used for limiting the MABR on the guide rail and can freely float up and down on the guide rail; the pulse aeration box is positioned below the MABR membrane component and is used for pulse aeration. According to the utility model, the pulse aeration and the MABR technology are combined, the MABR can automatically sink and float up and down under the action of self gravity and buoyancy of the MABR, the thickness of the MABR biological membrane layer is further adaptively controlled, and the device is energy-saving, efficient and free of manual operation.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and specifically, to a MABR membrane aeration reaction system capable of adaptively adjusting the thickness of a biofilm layer. Background Art

[0002] The MABR membrane aeration reactor is a novel water treatment device that combines membrane separation technology and biological treatment technology. Its core components include oxygen-permeable hollow fiber membranes and biofilms. A biofilm grows attached to the outer surface of the hollow fiber membranes. Air supplies oxygen to the biofilm through the hollow fiber membranes, and the organic matter, nitrogen, and phosphorus contained in the sewage are adsorbed, absorbed, and decomposed by the biofilm (realizing simultaneous nitrification and denitrification), thereby purifying the sewage.

[0003] Due to the large coverage area and small number of MABR membrane modules, and the ability to perform in-situ repair (without the need to construct any additional structures), the treatment cost is relatively low. The oxygen utilization rate of traditional technologies is between 10% and 20%, while the theoretical oxygen transfer efficiency of MABR can reach 100%. The aeration membrane area per unit volume is large, the energy consumption is low, and the efficiency is high, making it particularly suitable for large-scale and long-term operation in river regulation / sponge city planning.

[0004] The thickness and stability of the biofilm have a significant impact on the operation effect of MABR. An overly thick biofilm will increase the mass transfer resistance, while an overly thin biofilm cannot provide sufficient biomass, thereby affecting the sewage treatment effect. However, the growth and shedding of the biofilm is a dynamic process. How to effectively control the thickness of the biofilm is an important problem faced by MABR technology. Currently, it is relatively difficult to control the thickness of the biofilm on the surface of the MBAR membrane filaments during the use of the MBAR membrane aeration reactor. Currently, it is mostly determined whether to start aeration for biofilm layer control by regularly observing the degree of biofilm growth or directly at regular intervals. The operation is relatively cumbersome, which may easily lead to an overly thick biofilm or an insufficient growth of the biofilm. Summary of the Invention

[0005] Technical Problem: The technical problem to be solved by the present utility model is to provide a novel MABR membrane bioreactor to solve the following problems in the prior art: 1) the problem of high energy consumption caused by continuous aeration; 2) the technical problem that it is difficult to accurately control the thickness of the MABR biofilm, which may affect the sewage treatment effect; 3) the complex operation of controlling the thickness of the MABR biofilm, which requires professional technical personnel for operation and maintenance.

[0006] Technical Solution: To solve the above technical problems, the technical solution adopted in the embodiment of the present utility model is as follows: A MABR membrane aeration reaction system capable of adaptively adjusting the thickness of a biofilm layer, comprising: a membrane tank of the MABR membrane bioreactor, and guide rails. The MABR membrane bioreactor is movably limited on the guide rails, and a guide rail limit block is provided at the upper end of the guide rails.

[0007] The MABR membrane bioreactor includes a membrane rack and a membrane module. The membrane rack is a cubic and hollow structure. The upper end of the membrane rack is provided with a MABR membrane air inlet, a MABR membrane tail gas discharge port, an aeration air inlet, and a fixing pin. The fixing pin is connected to the valve of the aeration air inlet valve through a control link. The MABR membrane air inlet, the MABR membrane tail gas discharge port, and the aeration air inlet are sequentially connected to an intake hose, a tail gas exhaust hose, and an aeration air inlet hose respectively;

[0008] The upper end of the membrane rack is also provided with an upper interface of the MABR membrane module for installing the upper end of the MABR membrane module, and the lower end of the membrane rack is provided with a lower interface of the MABR membrane module for installing the lower end of the MABR membrane module;

[0009] The lower end of the membrane rack is provided with a pulsed aeration box, which is located below the MABR membrane module and is used for pulsed aeration.

[0010] The membrane rack is also provided with limiting claws, which are located on both sides of the membrane rack and are used to limit the MABR membrane bioreactor on the guide rail and can freely float up and down on the guide rail.

[0011] Furthermore, a counterweight is provided on the membrane rack, and the weight of the counterweight can be calculated according to the required thickness of the biofilm layer to be controlled, so as to be applicable to the requirements of controlling different biofilm layer thicknesses.

[0012] Furthermore, a cross beam is provided at the upper end of the membrane rack, and the counterweight is arranged on the cross beam to facilitate the adjustment of the number and weight of the counterweight.

[0013] Furthermore, the pulsed aeration box is located between two membrane modules and corresponds to the MABR membrane module one by one, ensuring that the pulsed aeration air flow can wash the surface of the membrane filaments along between the membrane modules.

[0014] In the present utility model, when the biofilm layer of the MABR membrane aeration reactor is relatively thick and greater than the set value, the gravity of the MABR membrane aeration reactor is greater than the buoyancy, and the MABR membrane aeration reactor sinks. The control link drives the aeration valve to rotate, and the aeration valve opens for pulsed aeration. When the MABR membrane aeration reactor is in the initial state or the biofilm layer thickness is normal, the gravity of the MABR membrane aeration reactor is less than the buoyancy, and the MABR membrane aeration reactor floats. The control link drives the aeration valve to rotate, and the aeration valve closes to stop pulsed aeration.

[0015] Beneficial effects: Compared with the prior art, the technical solution of the present utility model has the following beneficial effects: The present utility model combines pulsed aeration and MABR technology. Through the action of its own gravity and buoyancy, MABR can automatically sink and float up and down, and then adaptively control the thickness of the MABR biofilm layer. This automatic control method greatly simplifies the operation process, eliminates the need for professional technicians to operate and maintain, and reduces the operating cost. The present utility model uses a pulsator for aeration. Compared with the traditional continuous aeration method, it can scour the biofilm layer on the surface of the MABR membrane filaments with a larger air volume, intermittently and efficiently while reducing the aeration energy consumption.

[0016] By combining pulsed aeration and MABR technology, the present utility model can more accurately control the thickness of the biofilm, avoid the problem of poor sewage treatment effect caused by uneven biofilm thickness, and improve the efficiency and quality of sewage treatment.

[0017] The present utility model is provided with counterweights on the membrane rack, and the weight of the counterweights to be added can be calculated according to the thickness of the biofilm to be controlled, so as to accurately control the thickness of the biofilm layer. Description of the Drawings

[0018] Figure 1 is a MABR membrane aeration reaction system capable of adaptively adjusting the thickness of the biofilm layer in the embodiment.

[0019] Figure 2 is a schematic diagram of the membrane rack in the embodiment.

[0020] Figure 3 is a schematic diagram of the membrane rack with a pulsed aeration box.

[0021] Figure 4 is a MABR membrane bioreactor in the embodiment.

[0022] Figure 5 is a schematic diagram of another side of the membrane rack in the embodiment.

[0023] Figure 6 is a partial enlarged view of the guide rail limit block in the embodiment.

[0024] Figure 7 is a partial schematic diagram when the pulsed aeration valve is in the closed state.

[0025] Figure 8 is a partial schematic diagram when the pulsed aeration valve is in the open state.

[0026] In the figure: 1. MABR membrane bioreactor; 2. Membrane tank; 3. Guide rail; 4. Guide rail limit block; 5. MABR membrane air inlet; 6. MABR membrane tail gas outlet; 7. Aeration air inlet; 8. Upper interface of MABR membrane module; 9. Lower interface of MABR membrane module; 10. Counterweight; 11. Limit claw; 17. Cross beam; 13. Pulse aeration box; 14. Membrane module; 15. Intake hose; 16. Control connecting rod; 17. Aeration valve; 18. Aeration inlet pipe; 19. Tail gas exhaust pipe; 20. Fixed pin. Detailed implementation mode

[0027] The technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings.

[0028] To solve the above technical problems, the technical solution adopted in the embodiment of the present utility model is: a MABR membrane aeration reaction system capable of self-adaptively adjusting the thickness of the biofilm layer, including: a MABR membrane bioreactor 1, a membrane tank 2, and a guide rail 3. The MABR membrane bioreactor 1 is movably limited on the guide rail 3, and a guide rail limit block 4 is provided at the upper end of the guide rail.

[0029] The MABR membrane bioreactor 1 includes a membrane rack and a membrane module 14. The membrane module is composed of several MABR hollow fiber membrane filaments cast at both ends in a membrane shell. The membrane rack is a cube and a hollow structure, and further is a rectangular parallelepiped hollow structure. An MABR membrane air inlet 5 is provided at the upper end of the membrane rack and is connected to the intake hose 15 for conveying gas to the MABR membrane module.

[0030] An MABR membrane tail gas discharge port 6 is provided at the upper end of the membrane rack and is connected to the tail gas exhaust pipe 19 for exhausting the tail gas in the MABR membrane filaments.

[0031] A fixed pin 20 and an aeration air inlet 7 are also provided at the upper end of the membrane rack. The fixed pin 20 is connected to the valve of the aeration inlet valve 17 through a control connecting rod 16. The aeration air inlet 7 is connected to the aeration inlet pipe 18. When the biofilm layer of the MABR membrane aeration reactor is thicker and greater than the set value, the gravity of the MABR membrane aeration reactor is greater than the buoyancy, and the MABR membrane aeration reactor sinks. The control connecting rod drives the aeration valve to rotate, and the aeration valve opens for pulse aeration. When the MABR membrane aeration reactor is in the initial state or the biofilm layer thickness is normal, the gravity of the MABR membrane aeration reactor is less than the buoyancy, the MABR membrane aeration reactor floats, the control connecting rod drives the aeration valve to rotate, and the aeration valve closes to stop pulse aeration.

[0032] An upper interface 8 of the MABR membrane module is also provided at the upper end of the membrane rack for installing the upper end of the MABR membrane module, and a lower interface 9 of the MABR membrane module is provided at the lower end of the membrane rack for installing the lower end of the MABR membrane module.

[0033] A pulse aeration box 13 is provided at the lower end of the membrane rack, which is located below the MABR membrane module and is used for pulse aeration.

[0034] Limit claws 11 are provided on the corresponding cross beams of the membrane rack. There are 4 in total, corresponding up and down, and are located on both sides of the membrane rack. They are used for limiting on the guide rail 3. The diameter of the limit claws 11 is larger than that of the guide rail 3, so that the MABR membrane aeration reactor 1 can freely float up and down on the guide rail 3.

[0035] Furthermore, a counterweight 10 is provided on the membrane rack. The weight of the counterweight can be calculated according to the required thickness of the biological membrane layer to be controlled, and then it is suitable for controlling the requirements of different biological membrane layer thicknesses.

[0036] Furthermore, a cross beam 17 is provided at the upper end of the membrane rack. The counterweight 10 is arranged on the cross beam 17. There can be multiple counterweights 10, which are evenly distributed on the cross beam 17. Arranging the counterweight 10 on the upper end cross beam of the membrane rack facilitates adjusting the quantity and weight of the counterweight to meet the requirements of different biological membrane layer thicknesses.

[0037] Furthermore, the pulse aeration box 13 is located between two membrane modules and corresponds to the MABR membrane module one by one, ensuring that the air flow of the pulse aeration can wash the surface of the membrane filaments along between the membrane modules.

[0038] During the use process: According to the thickness of the MABR biological membrane to be controlled, calculate the weight of the counterweight to be added, and install the MABR membrane bioreactor in the membrane tank in the following Figure 1 way. Open the valves of the air inlet hose and the tail gas exhaust pipe, introduce the required gas into the membrane module, and discharge the original gas in the membrane module. When the membrane stack is in the initial state or the biological membrane is in the normal state, at this time, the gravity of the MABR reactor is less than the buoyancy, and the membrane module is in the floating state, as Figure 7 shown. At this time, the aeration inlet valve is in the closed state under the action of the control link. As the thickness of the MABR biological membrane increases, the weight of the MABR membrane bioreactor continuously increases. When the weight of the MABR membrane bioreactor is greater than its own buoyancy, as Figure 8 shown. At this time, the aeration inlet valve is in the open state under the action of the control link, and pulse aeration is carried out to wash the surface of the MABR membrane. As the thickness of the biological membrane layer decreases, the weight of the MABR reactor decreases. When the gravity of the MABR reactor is less than the buoyancy, the MABR reactor floats up again, and the aeration valve is closed again under the action of the control link, so as to control the thickness of the biological membrane.

[0039] The basic principle, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above specific embodiments, and the above specific embodiments and the descriptions in the specification are only for further illustrating the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the claims and their equivalents.

Claims

1. A MABR membrane aeration reaction system capable of adaptively adjusting the thickness of the biofilm layer, characterized in that: include: MABR membrane bioreactor, membrane pool, guide rail, the MABR membrane bioreactor is installed on the guide rail and can move on the guide rail, and the upper end of the guide rail is provided with a guide rail limit block; The MABR membrane bioreactor comprises a membrane frame and a membrane assembly, wherein the membrane frame is a cubic and hollow structure, and an MABR membrane air inlet, a MABR membrane tail gas outlet, an aeration air inlet, and a fixing pin are arranged at the upper end of the membrane frame, and the fixing pin is connected to the valve of the aeration air inlet valve through a control connecting rod, and the MABR membrane air inlet, the MABR membrane tail gas outlet, and the aeration air inlet are respectively connected to the air inlet hose, the tail gas exhaust pipe, and the aeration air inlet hose in sequence; The upper end of the membrane frame is also provided with an upper end interface of the MABR membrane assembly for installing the upper end of the MABR membrane assembly, and the lower end of the membrane frame is provided with a lower end interface of the MABR membrane assembly for installing the lower end of the MABR membrane assembly; The membrane frame is also provided with a limiting claw and a pulse aeration box. The limiting claw is located on both sides of the membrane frame and is used to limit the MABR membrane bioreactor on the guide rail, and can float freely up and down on the guide rail; the pulse aeration box is located below the MABR membrane assembly and is used for pulse aeration.

2. A MABR membrane aeration reaction system capable of adaptively adjusting the thickness of the biofilm layer according to claim 1, characterized in that: The membrane frame is provided with a counterweight block, and the weight of the counterweight block required can be calculated according to the thickness of the biofilm layer to be controlled, thereby being suitable for controlling the thickness of different biofilm layers.

3. A MABR membrane aeration reaction system capable of adaptively adjusting the thickness of the biofilm layer according to claim 2, characterized in that: A crossbeam is provided at the upper end of the membrane frame, and the counterweight blocks are arranged on the crossbeam, so as to facilitate the adjustment of the number and weight of the counterweight blocks.

4. A MABR membrane aeration reaction system capable of adaptively adjusting the thickness of the biofilm layer according to claim 1, characterized in that: The pulse aeration box is located between the two membrane modules and corresponds to the MABR membrane modules one by one, ensuring that the pulse aeration airflow can flush the membrane fiber surface along the membrane modules.

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