A modified aeration water production system for MBR membrane tank

Abstract

The utility model discloses a MBR membrane cell improvement aeration water production system belongs to biochemical treatment stage technical field of sewage treatment industry, and this system includes the communication of adjusting pool, anoxic pool, aerobic pool and membrane cell in proper order, is equipped with the inlet pipe in adjusting pool, is equipped with MBR membrane module in membrane cell, and MBR membrane module includes membrane frame, is installed with membrane element in membrane frame, and the membrane element is by a plurality of membrane units, and the top and bottom of membrane element are equipped with first water collection channel and second water collection channel respectively, and first water collection channel and second water collection channel all are connected with drainage main pipe, and the water outlet end of drainage main pipe is equipped with water pump, and the top and bottom of membrane frame are equipped with impact aerator and micropore aerator respectively. The system is through setting up impact aerator and micropore aerator at the top and bottom of membrane element, combines double -channel water collection design, prevents local rapid pollution blockage, and delays membrane pollution speed. Impact aerator removes top membrane element water collection root adhesion pollutant when operating, improves filtration efficiency and service life.

Description

Technical Field

[0001] This utility model relates to the technical field of biochemical treatment stage in the wastewater treatment industry, specifically to an improved MBR membrane tank aeration water production system. Background Technology

[0002] Membrane bioreactor (MBR) technology is widely used in the treatment of domestic sewage and industrial wastewater due to its high efficiency in interception and high quality effluent. The most commonly used membrane types are hollow fiber membranes and flat sheet membranes. Hollow fiber membranes are often used in small sewage treatment plants because of their high packing density and small footprint. The water collection pipe of the hollow fiber membrane module is usually located at the top, and the aeration pipe is located at the bottom of the membrane module. During operation, aeration is carried out at one end and water is collected at the other end.

[0003] In existing technologies, membrane element surfaces are easily fouled by sludge, colloids, microorganisms, etc., leading to a decrease in membrane flux. Operating at critical flux is a principle that MBR membranes must adhere to. Hollow fiber membranes, due to their small diameter and long membrane fibers along their length, have uneven water output per unit membrane area, which restricts their water production. Due to uneven membrane flux distribution, membrane fouling often occurs first at the point closest to the outlet, where the membrane operates at supercritical flux. The initial fouling and blockage point of hollow fiber membranes is located at the root of the membrane fiber connecting to the water collection pipe. The constant flow operation further drives the rapid spread and proliferation of fouling and blockage. After local fouling, the effective filtration area decreases. To maintain stable membrane flux, the membrane flux in other areas must be increased to compensate, which exacerbates the regional supercritical flux operation and uneven flux distribution, resulting in more rapid membrane fouling and even catastrophic membrane fouling accidents. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing an improved aeration and water production system for MBR membrane tanks. It solves the problem of uneven membrane fouling in hollow fiber membrane elements, which leads to abnormal membrane fouling rates. This effectively extends the service life of hollow fiber membrane elements and reduces the frequency of offline cleaning.

[0005] To achieve the above objectives, this utility model designs an improved MBR membrane tank aeration and water production system, comprising an equalization tank, an anoxic tank, an aerobic tank, and a membrane tank connected in sequence. The equalization tank is equipped with an inlet pipe, and the membrane tank is equipped with an MBR membrane module. The MBR membrane module includes a membrane frame, and membrane elements are installed in the membrane frame. Each membrane element is composed of multiple membrane units. The top and bottom of each membrane element are respectively provided with a first water collection channel and a second water collection channel. Both the first and second water collection channels are connected to a main drainage pipe. The outlet end of the main drainage pipe is equipped with an outlet pump. The top and bottom of the membrane frame are respectively provided with an impact aerator and a microporous aerator.

[0006] Preferably, the bottom of the first water collection channel and the top of the second water collection channel are provided with a plurality of corresponding pores, and the pores correspond one-to-one with the membrane units.

[0007] Preferably, one end of the first water collection channel and the second water collection channel are sealed, and the other end is respectively connected to the first drainage branch pipe and the second drainage branch pipe.

[0008] Preferably, the first drainage branch pipe is equipped with a first valve.

[0009] Preferably, a second valve is provided on the second drainage branch pipe.

[0010] Preferably, an aerator is provided next to the membrane tank, the aerator is connected to an aeration main pipe, the aeration main pipe is connected to a first aeration branch pipe and a second aeration branch pipe, and the first aeration branch pipe and the second aeration branch pipe are respectively connected to an impact aerator and a microporous aerator.

[0011] Preferably, the first aeration branch pipe is provided with a first air valve.

[0012] Preferably, the second aeration branch pipe is provided with a second air valve.

[0013] Preferably, the membrane unit is a hollow fiber membrane.

[0014] Preferably, the MBR membrane tank improved aeration water production system further includes an intelligent control cabinet, the signal output terminal of which is connected to the signal receiving terminals of the effluent pump and the aerator; the signal receiving terminal of the intelligent control cabinet is connected to the signal output terminals of the first valve, the second valve, the first air valve, and the second air valve.

[0015] The beneficial effects of this utility model are:

[0016] This invention achieves a more uniform flux distribution during filtration by incorporating impact aerators and microporous aerators at the top and bottom of the membrane element, combined with a dual-channel water collection design of the first and second water collection channels. This effectively prevents rapid fouling and clogging in localized areas caused by supercritical flux operation, significantly slowing down membrane fouling. The impact aerators disrupt the upper water flow of the membrane element, helping to remove contaminants attached to the root of the permeate at the top of the membrane element, further reducing permeate membrane fouling and improving filtration efficiency and lifespan. Simultaneously, by optimizing the filtration and cleaning process, the frequency of offline cleaning of the membrane element is greatly reduced, decreasing maintenance workload and cleaning costs, thereby extending the lifespan of the hollow fiber membrane element. Attached Figure Description

[0017] Figure 1 This is a process flow diagram of the present invention;

[0018] Figure 2This is a flowchart of the membrane tank and process of this utility model.

[0019] Figure label:

[0020] 1 regulating tank, 11 inlet pipes,

[0021] 2. Anoxic pool

[0022] 3. Aerobic tank

[0023] 4. Membrane pool

[0024] 5MBR membrane module, 51 membrane frame, 52 membrane element, 53 first water collection channel, 54 second water collection channel, 55 impact aerator, 56 microporous aerator.

[0025] 6. Main drainage pipe, 61. Outlet pump, 62. First drainage branch pipe, 621. First valve, 63. Second drainage branch pipe, 631. Second valve.

[0026] 7 Aerator, 71 Main aeration pipe, 72 First aeration branch pipe, 721 First air valve, 73 Second aeration branch pipe, 731 Second air valve,

[0027] 8. Intelligent control cabinet. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figures 1-2 The MBR membrane tank modified aeration permeate system shown includes an equalization tank 1, an anoxic tank 2, an aerobic tank 3, and a membrane tank 4 connected in sequence. An inlet pipe 11 is installed in the equalization tank 1. An MBR membrane module 5 is installed in the membrane tank 4. The MBR membrane module 5 includes a membrane frame 51, within which membrane elements 52 are installed. Each membrane element 52 consists of multiple membrane units, which are hollow fiber membranes. A first water collection channel 53 and a second water collection channel 54 are respectively located at the top and bottom of the membrane element 52. Both the first water collection channel 53 and the second water collection channel 54 are connected to a main drainage pipe 6. An outlet pump 61 is installed at the outlet end of the main drainage pipe 6. An impact aerator 55 and a microporous aerator 56 are respectively located at the top and bottom of the membrane frame 51. Multiple corresponding pores are provided at the bottom of the first water collection channel 53 and the top of the second water collection channel 54, with each pore corresponding to a membrane unit.

[0036] The first water collection channel 53 and the second water collection channel 54 are sealed at one end, and the other end is connected to the first drainage branch pipe 62 and the second drainage branch pipe 63, respectively. The first drainage branch pipe 62 is equipped with a first valve 621. The second drainage branch pipe 63 is equipped with a second valve 631.

[0037] An aerator 7 is installed beside the membrane tank 4. The aerator 7 is connected to an aeration main pipe 71, which is connected to a first aeration branch pipe 72 and a second aeration branch pipe 73. The first aeration branch pipe 72 and the second aeration branch pipe 73 are respectively connected to an impact aerator 55 and a microporous aerator 56. A first air valve 721 is installed on the first aeration branch pipe 72. A second air valve 731 is installed on the second aeration branch pipe 73.

[0038] The MBR membrane tank improved aeration water production system also includes an intelligent control cabinet 8. The signal output terminal of the intelligent control cabinet 8 is connected to the signal receiving terminal of the effluent pump 61 and the aerator 7. The signal receiving terminal of the intelligent control cabinet 8 is connected to the signal output terminals of the first valve 621, the second valve 631, the first air valve 721 and the second air valve 731.

[0039] The following describes the technological process of this utility model:

[0040] The wastewater to be treated first enters the equalization tank 1 through the inlet pipe 11. In the equalization tank 1, the water quality and quantity of the wastewater are adjusted to make the subsequent treatment process more stable.

[0041] Next, the wastewater flows into anoxic tank 2, where denitrification occurs to remove nitrate nitrogen. In an anaerobic environment, denitrifying bacteria use organic matter in the wastewater as electron donors to reduce nitrate nitrogen to nitrogen gas, thus achieving denitrification.

[0042] Then, the wastewater enters aerobic tank 3 for aerobic biological treatment. In aerobic tank 3, aerobic microorganisms utilize the organic matter in the wastewater for metabolism, decomposing the organic matter into inorganic substances such as carbon dioxide and water, while simultaneously carrying out nitrification to convert ammonia nitrogen into nitrate nitrogen.

[0043] After aerobic treatment, the wastewater flows into membrane tank 4. Inside membrane tank 4, MBR membrane module 5 filters and separates the wastewater into solids and liquids. Initially, the first valve 621 and the first air valve 721 are closed. Intelligent control cabinet 8 controls the operation of effluent pump 61. Inside membrane tank 4, wastewater is filtered through MBR membrane module 5. The filtered wastewater flows from the bottom of membrane element 52 into the second water collection channel 54, and then is discharged through the second drainage branch pipe 63 and the main drainage pipe 6. At this time, microporous aerator 56 provides aeration to the membrane surface to prevent pollutant accumulation and maintain an aerobic environment.

[0044] The intelligent control cabinet 8 controls the system's operation based on a preset time. Upon reaching the preset time, the intelligent control cabinet 8 automatically opens the first valve 621 and the first air valve 721, while simultaneously closing the second valve 631 and the second air valve 731. At this time, the water collection direction of the membrane element 52 changes, and the filtered wastewater flows from the top of the membrane element 52 into the first water collection channel 53. The impact aerator 55 starts operating, disturbing the water flow on the upper layer of the membrane element 52, helping to remove contaminants attached to the root of the permeate at the top of the membrane element 52, preventing fouling accumulation on the membrane surface, thereby improving the membrane's filtration efficiency and service life. The entire process is automatically controlled by the intelligent control cabinet 8, ensuring stable system operation.

[0045] Example 2

[0046] The structure of Example 2 is largely the same as that of Example 1, except that the intelligent control cabinet 8 is reduced and manual control is used, thereby further saving manufacturing costs and achieving a similar wastewater treatment effect as Example 1. Operators need to perform manual operation periodically to ensure the efficient operation of the system. This solution is suitable for application scenarios that are cost-sensitive and do not require a high degree of automation.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An MBR membrane cell modified aeration water production system, characterized in that: The system includes an equalization tank (1), an anoxic tank (2), an aerobic tank (3), and a membrane tank (4) connected in sequence. The equalization tank (1) is equipped with an inlet pipe (11). The membrane tank (4) is equipped with an MBR membrane module (5). The MBR membrane module (5) includes a membrane frame (51). The membrane frame (51) is equipped with membrane elements (52). The membrane elements (52) are composed of multiple membrane units. The top and bottom of the membrane elements (52) are respectively equipped with a first water collection channel (53) and a second water collection channel (54). The first water collection channel (53) and the second water collection channel (54) are both connected to a drainage main pipe (6). The outlet end of the drainage main pipe (6) is equipped with an outlet pump (61). The top and bottom of the membrane frame (51) are respectively equipped with an impact aerator (55) and a microporous aerator (56).

2. The MBR membrane cell modified aeration water production system according to claim 1, characterized in that: The bottom of the first water collection channel (53) and the top of the second water collection channel (54) are provided with a plurality of corresponding pores, and the pores correspond one-to-one with the membrane units.

3. The MBR membrane cell modified aeration water production system according to claim 1, characterized in that: The first water collection channel (53) and the second water collection channel (54) are sealed at one end, and the other end is connected to the first drainage branch pipe (62) and the second drainage branch pipe (63), respectively.

4. The MBR membrane cell modified aeration water production system according to claim 3, characterized in that: The first drainage branch pipe (62) is equipped with a first valve (621).

5. The MBR membrane cell modified aeration water production system according to claim 3, characterized in that: The second drainage branch pipe (63) is equipped with a second valve (631).

6. The improved MBR membrane tank aeration permeate system according to claim 1, characterized in that: An aerator (7) is provided next to the membrane tank (4). The aerator (7) is connected to an aeration main pipe (71). The aeration main pipe (71) is connected to a first aeration branch pipe (72) and a second aeration branch pipe (73). The first aeration branch pipe (72) and the second aeration branch pipe (73) are respectively connected to an impact aerator (55) and a microporous aerator (56).

7. The improved MBR membrane tank aeration permeate system according to claim 6, characterized in that: The first aeration branch pipe (72) is equipped with a first air valve (721).

8. The improved aeration permeate system for MBR membrane tanks according to claim 6, characterized in that: The second aeration branch pipe (73) is equipped with a second air valve (731).

9. The improved aeration permeate system for MBR membrane tanks according to claim 1, characterized in that: The membrane unit is a hollow fiber membrane.

10. The MBR membrane tank modified aeration permeate system according to any one of claims 1 to 8, characterized in that: The MBR membrane tank improved aeration water production system also includes an intelligent control cabinet (8), the signal output terminal of which is connected to the signal receiving terminal of the effluent pump (61) and the aerator (7); the signal receiving terminal of the intelligent control cabinet (8) is connected to the signal output terminals of the first valve (621), the second valve (631), the first air valve (721), and the second air valve (731).

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