Three-dimensional sewage treatment device

Abstract

The utility model discloses a three-dimensional sewage treatment device, which relates to the technical field of sewage treatment devices, and comprises a lower membrane frame, a plurality of groups of MABR membrane elements are horizontally mounted on the inner side of the lower membrane frame at intervals, each group of MABR membrane elements are connected through a lower membrane air supply pipe, a horizontally placed upper membrane frame is arranged above the lower membrane frame, and the lower membrane frame is connected with the upper membrane frame through a lower membrane air supply pipe. The upper membrane frame is internally provided with a plurality of groups of membrane components which are distributed on an upper layer and a lower layer at intervals, each group of membrane components is connected through a connecting pipe, the uppermost membrane component is an aeration membrane aerobic layer, the middle layer is a bubble-free MABR membrane, and the bottom layer of the upper membrane frame is provided with an aeration pipe. By adopting the MABR membrane element and the membrane component curtain type membrane component, the device is high in impact resistance, in-situ indigenous microorganism biofilm formation capability and pollutant degradation capability, flexible in structure, capable of rapidly improving water quality, low in cost, simple in operation, energy-saving, movable, high in efficiency and remarkable in landscape ecological effect.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment devices, specifically to a three-dimensional sewage treatment device. Background Technology

[0002] Wastewater biological treatment primarily utilizes microorganisms to degrade pollutants, namely aerobic and anaerobic (facultative anaerobic) biological treatment processes. In this process, organic pollutants serve as energy and electron donors, with microorganisms metabolizing them and using the energy gained to support cell reproduction and maintain life. Oxygen, nitrite or nitrate, sulfate, and carbon dioxide act as electron acceptors. However, traditional packing materials are diverse, including honeycomb, corrugated plate, porous, and spherical biological packing materials, each with its own drawbacks in practical application. For example, honeycomb packing materials have poor impact resistance and the biofilm is prone to detachment; suspended biological packing materials are prone to clumping, and the central part of the clumping creates an anaerobic environment, resulting in a short service life. Therefore, a three-dimensional wastewater treatment device is proposed to solve these problems. Utility Model Content

[0003] To address the problems mentioned above, the present invention provides the following technical solution: a three-dimensional wastewater treatment device, comprising a lower membrane frame, wherein several groups of MABR membrane elements are horizontally spaced on the inner side of the lower membrane frame, each group of MABR membrane elements is connected via a lower membrane air supply pipe, an upper membrane frame is horizontally placed above the lower membrane frame, and the upper membrane frame contains several groups of membrane modules arranged in two layers at intervals, each group of membrane modules is connected via a connecting pipe, the uppermost membrane module is an aerobic layer of aerated membrane used to increase dissolved oxygen in the water, the middle layer of membrane module is a bubble-free MABR membrane used for nitrification and denitrification reactions in anoxic wastewater, and an aeration pipe is provided at the bottom of the upper membrane frame for air scrubbing of the two layers of membrane modules distributed above.

[0004] Preferably, the membrane assembly is distributed in two layers, with two groups in the upper layer and three groups in the lower layer, and the layers are arranged in parallel and staggered manner.

[0005] Preferably, the end of the connecting pipe is provided with an oxygen inlet, and the upper and lower layers of the connecting pipe are connected by a U-shaped fitting.

[0006] Preferably, an air inlet is provided on one side of the aeration pipe, and the aeration pipe includes an outer aeration main pipe and multiple aeration branch pipes distributed inside.

[0007] Preferably, the bottom of the aeration pipe is provided with two rows of parallel air outlet holes, and the end of the aeration branch pipe is provided with an internal threaded connector, which is connected to the main aeration pipe through a T-shaped pipe fitting.

[0008] Preferably, a lower membrane air supply pipe is installed on one side below the lower membrane frame, and a lower membrane frame aeration pipe is installed in the middle of the lower part of the lower membrane frame.

[0009] Preferably, a lower membrane exhaust pipe is installed below the lower membrane frame on the side opposite to the lower membrane air supply pipe, and a condensate outlet is provided below the lower membrane exhaust pipe.

[0010] This utility model has the following advantages: It adopts MABR membrane elements and membrane modules, and curtain-type membrane modules, which have high impact resistance, in-situ indigenous microbial biofilm formation ability and pollutant degradation ability. The flexible membrane module structure can quickly improve water quality, has low cost, simple operation and management, energy saving, mobility, high efficiency, significant landscape and ecological effects, strong adaptability to comprehensive treatment, high integration, and can be put into use immediately. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the assembly structure of the upper membrane frame and membrane module according to a preferred embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the internal tubular structure of the upper membrane frame according to a preferred embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of the upper membrane frame structure of a preferred embodiment of the present invention;

[0015] Figure 5 This is a schematic diagram of the aeration pipe structure of a preferred embodiment of the present invention;

[0016] Figure 6 This is a schematic diagram of the air outlet at the bottom of the aeration pipe in a preferred embodiment of this utility model;

[0017] Figure 7 This is a schematic diagram of the lower membrane frame structure of a preferred embodiment of the present invention.

[0018] Explanation of reference numerals in the attached diagram: 1. Lower membrane frame; 2. MABR membrane element; 3. Upper membrane frame; 4. Membrane module; 5. Air inlet; 6. Aeration pipe; 7. Air outlet; 8. Internal threaded connector; 9. Oxygen inlet; 10. Connecting pipe; 11. U-shaped fitting; 12. Lower membrane air supply pipe; 13. Lower membrane frame aeration pipe; 14. Lower membrane exhaust pipe; 15. Condensate outlet. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Please refer to the following: Figures 1-7 This utility model discloses a three-dimensional wastewater treatment device. A lower membrane frame 1 has several sets of MABR membrane elements 2 horizontally spaced on its inner side. Each set of MABR membrane elements 2 is connected via a lower membrane air supply pipe 12. Above the lower membrane frame 1, a horizontally placed upper membrane frame 3 is arranged. Inside the upper membrane frame 3, several sets of membrane modules 4 are arranged in two layers spaced apart. Each set of membrane modules 4 is connected via a connecting pipe 10. The uppermost membrane module 4 is an aerobic layer with aeration, and the middle layer is a bubble-free MABR membrane. The bottom layer of the upper membrane frame 3 has an aeration pipe 6 for air scrubbing the two layers of membrane modules 4 distributed above. The upper membrane frame 3 is divided into three layers: the bottom aeration pipe 6 is for air scrubbing; the middle layer is a bubble-free MABR membrane used for nitrification and denitrification of wastewater in the anoxic layer; and the upper aerobic layer with aeration is used to increase dissolved oxygen in the water. The air inlet 5 is the air inlet of the aeration pipe 6, which cleans the two layers of membrane modules 4 distributed above.

[0023] In this embodiment, the MABR membrane element 2 is a composite polymer hydrophobic membrane with selective permeability. When air flows inside the membrane, only oxygen is allowed to diffuse from the inside of the membrane to the outer surface, while water molecules cannot diffuse into the inside of the membrane. Biofilm formation: After oxygen permeates through the MABR membrane element 2 to the outer surface of the membrane, an aerobic environment is formed on the membrane surface, allowing microorganisms in the wastewater to attach and grow on the membrane surface, forming a biofilm, with nitrifying bacteria as the dominant bacteria. Ammonia nitrogen and organic matter in the wastewater diffuse from the wastewater into the biofilm under the drive of the concentration difference. The nitrifying bacteria in the biofilm convert ammonia nitrogen into nitrate. At the same time, in the outermost layer of the membrane, due to contact with wastewater, it is in an anaerobic state. Denitrifying bacteria use the organic matter in the wastewater as a carbon source to reduce nitrate into nitrogen gas, thereby achieving simultaneous nitrification and denitrification and enhancing the removal of ammonia nitrogen, especially total nitrogen, from the wastewater.

[0024] Reference Figures 2-6 The membrane module 4 is distributed in two layers, with two sets in the upper layer and three sets in the lower layer, arranged in parallel and staggered configurations. The end of the connecting pipe 10 is equipped with an oxygen inlet 9, and the upper and lower connecting pipes 10 are connected by a U-shaped fitting 11. The bottom layer of the upper membrane frame 3 is equipped with an aeration pipe 6, with an air inlet 5 on one side. The aeration pipe 6 includes an outer main aeration pipe and multiple inner aeration branch pipes. The bottom of the aeration pipe 6 has two rows of parallel air outlets 7, and the ends of the aeration branch pipes are equipped with internal threaded connectors 8. The internal threaded connectors 8 are connected to the main aeration pipe via T-shaped fittings. Viewed from bottom to top, the two rows of air outlets 7 are parallel and not misaligned, allowing aeration outwards through the air outlets 7. Simultaneously, oxygen enters the connecting pipe 10 through the oxygen inlet 9 and is then transported to the membrane module 4. The staggered arrangement of the upper and lower membrane modules 4 further enhances the formation of a favorable environment on their surface, facilitating the cultivation of nitrifying bacteria and thus improving wastewater treatment efficiency.

[0025] Reference Figure 7 A lower membrane air supply pipe 12 is installed on one side below the lower membrane frame 1, and a lower membrane frame aeration pipe 13 is installed in the middle of the lower part of the lower membrane frame 1. A lower membrane exhaust pipe 14 is installed on the side of the lower membrane frame 1 opposite to the lower membrane air supply pipe 12. A condensate outlet 15 is set below the lower membrane exhaust pipe 14. All square tubes of the membrane frame are made of 25×25×1.5mm SS304, and all pipe openings must be sealed. The MABR membrane element 2 adopts the bubble-free aeration method of the lower membrane frame aeration pipe 13. Oxygen diffuses directly from the membrane to the biofilm in molecular form, avoiding the problems of low oxygen utilization, high energy consumption, and easy foam generation caused by bubble generation in traditional aeration methods. This greatly improves the oxygen mass transfer efficiency, reduces energy consumption, and also reduces environmental pollution.

[0026] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0027] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A three-dimensional wastewater treatment device, comprising a lower membrane frame (1), characterized in that, The lower membrane frame (1) is horizontally spaced with several sets of MABR membrane elements (2). Each set of MABR membrane elements (2) is connected by a lower membrane air supply pipe (12). A horizontally placed upper membrane frame (3) is set above the lower membrane frame (1). The upper membrane frame (3) is provided with several sets of membrane modules (4) arranged in two layers. Each set of membrane modules (4) is connected by a connecting pipe (10). The uppermost membrane module (4) is an aerobic layer of aerated membrane, which is used to increase the dissolved oxygen in the water. The middle layer membrane module (4) is a bubble-free MABR membrane, which is used for nitrification and denitrification of wastewater in the anoxic layer. An aeration pipe (6) is set at the bottom of the upper membrane frame (3) for air scrubbing the two layers of membrane modules (4) distributed above.

2. The three-dimensional sewage treatment device as described in claim 1, characterized in that, The membrane module (4) is distributed in two layers, with two sets in the upper layer and three sets in the lower layer, and the upper and lower layers are arranged in parallel and staggered.

3. The three-dimensional sewage treatment device as described in claim 1, characterized in that, The end of the connecting pipe (10) is provided with an oxygen inlet (9), and the upper and lower layers of the connecting pipe (10) are connected by a U-shaped fitting (11).

4. The three-dimensional sewage treatment device as described in claim 1, characterized in that, An air inlet (5) is provided on one side of the aeration pipe (6), and the aeration pipe (6) includes an outer aeration main pipe and multiple aeration branch pipes distributed inside.

5. A three-dimensional sewage treatment device as described in claim 4, characterized in that, The bottom of the aeration pipe (6) is provided with two rows of parallel air outlet holes (7), and the end of the aeration branch pipe is provided with an internal thread connector (8), which is connected to the main aeration pipe through a T-shaped pipe fitting.

6. A three-dimensional sewage treatment device as described in claim 1, characterized in that, A lower membrane air supply pipe (12) is installed on one side below the lower membrane frame (1), and a lower membrane frame aeration pipe (13) is installed in the middle of the lower part of the lower membrane frame (1).

7. A three-dimensional sewage treatment device as described in claim 1, characterized in that, A lower membrane exhaust pipe (14) is installed on the side opposite to the lower membrane air supply pipe (12) below the lower membrane frame (1), and a condensate outlet (15) is provided below the lower membrane exhaust pipe (14).

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