MBR sewage treatment device and treatment method thereof

Abstract

The present invention discloses an MBR sewage treatment device and treatment method thereof, comprising a circulation pipe, within which are disposed: MBR membrane tubes arranged in a circumferential array, with a centrally arranged mounting portion disposed on each of the plurality of MBR membrane tubes; a first stirring assembly, comprising a movable ring plate rotatably mounted on the mounting portion, with a plurality of straight-edged paddle members arranged in a circumferential array fixedly mounted on the movable ring plate; and a second stirring assembly, comprising a table-shaped guide shell fixedly mounted on the movable ring plate, with a plurality of turbulent paddles rotatably disposed circumferentially on the table-shaped guide shell. The MBR sewage treatment device and treatment method provided by the present invention, after the sewage passes through aeration, causes a large number of oxygen bubbles to be carried in the sewage, which are broken up and dissolved in the sewage as they pass through. The oxygen bubbles are then heated to a predetermined temperature by a spiral heating ring, maximizing the microbial activity in the sewage under sufficient oxygen and at a suitable temperature, thereby accelerating the sewage reaction efficiency and shortening the treatment cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an MBR sewage treatment device and a treatment method thereof. Background Art

[0002] The MBR sewage treatment method is an existing sewage treatment method. In conjunction with the publication (announcement) number: CN114262115A, the publication (announcement) date: 2022-04-01, the disclosed MBR sewage treatment system includes a regulating tank, an anoxic tank, and an MBR membrane tank arranged in sequence; a sewage delivery pump capable of supplying water to the regulating tank; the regulating tank is provided with a grid, an aeration and stirring device, and a liquid level control device; the regulating tank and the anoxic tank are connected by a sewage lift pump; the anoxic tank is provided with a packing rack and a first aeration device, and the packing rack is provided with packing; the anoxic tank and the MBR membrane tank are connected by a water inlet pump; the MBR membrane tank is provided with a membrane assembly and a second aeration device, and the water outlet of the membrane assembly is connected to a clean water pump. The advantages of the present invention are that it can effectively avoid the defects of environmental pollution and waste of water resources caused by industrial and domestic wastewater generated during the construction period of a power plant project. The disclosure, with publication number CN104496013A and publication date April 8, 2015, discloses an MBR wastewater treatment process, which includes first subjecting the membrane assembly to hydrophilic treatment; then securing the membrane assembly in an aeration tank, adding a proportional mixture of water, activated carbon, and activated sludge to the aeration tank; starting the MBR wastewater treatment system; and finally, allowing the water to flow through a safety filter to the membrane assembly for backwashing. The membrane bioreactor provided by the present invention is a modern wastewater treatment technology that combines the activated sludge process with membrane separation. The water quality meets national standards for miscellaneous water and can be used for toilet flushing, car washing, landscaping, landscape, and municipal water, as well as industrial cooling water and water for agriculture, forestry, fishery, and animal husbandry. The MBR wastewater treatment equipment is compact, efficient, and energy-efficient, making it particularly suitable for wastewater treatment in small and medium-sized factories, mines, hotels, restaurants, and residential areas. It allows for on-site wastewater treatment and direct reuse of reclaimed water, achieving zero emissions and saving significant water resources. It is an optimal choice for energy conservation, emission reduction, and sustainable development.

[0003] In the existing technology based on the above patent, in the current sewage treatment method, the MBR membrane group, aeration and temperature control are all independent components. The three operate independently and act on the entire sewage pool. However, for this treatment method, to act on the entire sewage pool, it is necessary to keep the entire sewage pool in full contact with the above three parts, so the entire treatment cycle requires a considerable amount of time, otherwise it cannot be guaranteed. Summary of the Invention

[0004] The purpose of the present invention is to provide an MBR sewage treatment device and a treatment method thereof to solve the above problems.

[0005] In order to achieve the above object, the present invention provides the following technical solution: an MBR sewage treatment device, comprising a circulation pipe, which is provided with:

[0006] The MBR membrane tubes are arranged in a circumferential array, and a centrally arranged mounting portion is provided on the plurality of MBR membrane tubes;

[0007] A first stirring assembly includes a movable ring plate rotatably mounted on the mounting portion, wherein a plurality of straight-edged paddle members arranged in a circumferential array are fixedly mounted on the movable ring plate;

[0008] The second stirring assembly comprises a platform-shaped flow guide shell fixedly mounted on the movable ring plate, wherein a plurality of spoiler blades are circumferentially arranged on the platform-shaped flow guide shell.

[0009] Preferably, the straight-edged paddle member is divided into a first blade and a second blade according to the structure, the first blade is arranged parallel to the movable ring plate, and the second blade is arranged perpendicular to the first blade.

[0010] Preferably, a spiral aeration pipe having one end fixed to the mounting portion is spirally arranged around the periphery of the plurality of MBR membrane tubes arranged in a circumferential array;

[0011] The spiral aeration tube is provided with air holes which are arranged toward the MBR membrane tube and obliquely along the water flow direction. The air holes are used to guide the sewage to flow in a spiral.

[0012] Preferably, a mesh is provided around the outer spiral of the spiral aeration tube. The mesh has a cross-sectional radius of 3 cm and a diamond-shaped structure, and is woven with 0.03 mm stainless steel wire.

[0013] Preferably, a guide cavity is provided on the movable ring plate, and the guide cavity is connected to the platform-shaped guide shell.

[0014] Preferably, the platform-shaped guide shell is provided with a plurality of drainage holes arranged in a circular array, and the spoiler paddles rotate circumferentially in the drainage holes.

[0015] Preferably, a spiral heating ring is provided spirally around the periphery of the plurality of MBR membrane tubes arranged in a circumferential array, one end of which is fixed on the mounting portion;

[0016] The spiral heating ring is arranged in the water outlet direction.

[0017] Preferably, the system further comprises parallel pipes arranged at the bottom of the sewage pool and in contact with the pool walls on both sides, wherein adjacent sides of two parallel pipes of the plurality of circulation pipes are fixedly connected to convection pipes arranged upward in a vertical direction on the water outlets, and the water outlets of the two rows of convection pipes are arranged adjacent to each other;

[0018] A sewage supply pipe arranged between a plurality of circulation pipes is connected between the two parallel pipes.

[0019] A method for treating MBR sewage, applied to the MBR sewage treatment device described in the above scheme, comprises the following steps:

[0020] S01. The sewage pump is running to draw sewage from the center of the bottom of the sewage pool into the parallel pipes through the sewage supply pipe, and then discharge it into the circulation pipes respectively;

[0021] S02. The sewage entering the circulation pipe passes through the MBR membrane tube and is aerated by the spiral aeration tube, causing the sewage to rotate and form a surrounding flow near the MBR membrane tube. The injected bubbles will hang on the mesh, so that the sewage passing through carries a large amount of oxygen bubbles.

[0022] S03. The sewage continues to flow through the first stirring assembly. Since the sewage rotates, it drives the movable ring plate to rotate, thereby driving the straight-edged paddles to break up a large number of oxygen bubbles and dissolve them in the sewage.

[0023] S04. In the above step 3, sewage flows back from the MBR membrane tube and drives the spoiler paddle in the second stirring assembly to rotate, thereby accelerating the rotation speed of the first stirring assembly. At the same time, the spoiler paddle also breaks up a large number of oxygen bubbles and dissolves them in the sewage.

[0024] S05, after being crushed, enters the spiral heating ring to keep the water temperature at 50℃, then is discharged into the convection pipe and finally discharged. The water flow directions of the two rows of convection pipes impact each other, and finally the liquid in the sewage pool is disturbed and circulated.

[0025] In the above technical solution, the present invention provides an MBR sewage treatment device and a treatment method thereof, which have the following beneficial effects: the water flow in the circulation pipe impacts the movable ring plate, causing the movable ring plate to rotate in a spiral direction along the inside of the circulation pipe and causing the straight-blade paddle member to rotate. At the same time, the second stirring component is arranged on the movable ring plate, so when the water flows through, it will also rotate and accelerate the first stirring component. Therefore, after the sewage passes through aeration, a large number of oxygen bubbles carried in the sewage are broken and dissolved in the sewage when passing through, and then heated to a predetermined temperature by a spiral heating ring, so that the microbial activity in the sewage under sufficient oxygen and suitable temperature is maximized, thereby accelerating the sewage reaction efficiency and shortening the treatment cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 A schematic diagram of the shell and tube circulation pipe structure provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of a cross-sectional structure of a shell and tube circulation tube side wall provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of a portion of the structure of a first stirring assembly and a second stirring assembly provided in an embodiment of the present invention;

[0030] Figure 4 A schematic side cross-sectional view of a portion of the first stirring assembly and the second stirring assembly provided in an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the enlarged structure of A provided in an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the enlarged structure of B provided in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the enlarged structure of C provided in an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the implementation structure of the official website system provided in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Circulation pipe; 2. First stirring assembly; 21. Movable ring plate; 22. Spiral aeration tube; 23. Mesh; 24. Straight-edged blade; 241. First blade; 242. Second blade; 25. MBR membrane tube; 26. Spiral heating ring; 3. Second stirring assembly; 31. Diversion chamber; 32. Platform-type diversion shell; 33. Drain hole; 34. Turbine paddle; 4. Sewage supply pipe; 5. Convection pipe; 6. Parallel pipe. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Example 1

[0039] like Figure 1-8 As shown, an MBR sewage treatment device includes a circulation pipe 1, which is provided with:

[0040] The MBR membrane tubes 25 are arranged in a circumferential array, and a centrally arranged mounting portion is provided on the plurality of MBR membrane tubes 25;

[0041] The first stirring assembly 2 includes a movable ring plate 21 rotatably mounted on the mounting portion, and a plurality of straight-edged paddle members 24 arranged in a circumferential array are fixedly mounted on the movable ring plate 21;

[0042] The second stirring assembly 3 includes a platform-shaped flow guide shell 32 fixedly mounted on the movable ring plate 21 , and a plurality of spoiler blades 34 are circumferentially rotatably arranged on the platform-shaped flow guide shell 32 .

[0043] Specific, combined Figure 8 It can be seen that the complete pipe network system of the MBR sewage treatment plant is as follows:

[0044] Parallel pipes 6 are installed at the bottom of the sewage tank and are arranged in close contact with the tank walls on both sides. Multiple circulation pipes 1 are located on adjacent sides of two parallel pipes 6, and the water outlets are fixedly connected to convection pipes 5 arranged vertically upward. The water outlets of the two rows of convection pipes 5 are arranged adjacent to each other. A sewage supply pipe 4, which is arranged between the multiple circulation pipes 1, is connected between the two parallel pipes 6. When the sewage pump is running, sewage is drawn from the center of the sewage tank bottom into the parallel pipes 6 through the sewage supply pipe 4. The sewage is then discharged into the circulation pipe 1 and then into the flow pipe 5 for final discharge. Because the water flow directions of the two rows of convection pipes 5 impact each other, the sewage in the sewage tank eventually flows from the center line toward the tank wall and then circulates back to the center line. The center line referred to here is the center line of the sewage tank.

[0045] The circulation pipe 1 is provided with a heating unit and an aeration unit, and the heating unit and the aeration unit can be conventional heating and aeration methods for sewage treatment, which will not be described in detail.

[0046] In the above technology, the water flowing in the circulation pipe 1 impacts the movable ring plate 21, causing the movable ring plate 21 to rotate in a spiral direction along the inside of the circulation pipe 1 and causing the straight-edged paddle member 24 to rotate. At the same time, the second stirring component 3 is arranged on the movable ring plate 21, so when the water flows through, it will also rotate and accelerate the first stirring component 2. Therefore, after the sewage passes through aeration, a large number of oxygen bubbles carried in the sewage are broken and dissolved in the sewage when passing through, and then heated to a predetermined temperature by the spiral heating ring 26, so that the microbial activity in the sewage is maximized under sufficient oxygen and at a suitable temperature, thereby accelerating the sewage reaction efficiency and shortening the treatment cycle.

[0047] As an embodiment further provided by the present invention, the straight-edged paddle member 24 is structurally divided into a first blade 241 and a second blade 242 . The first blade 241 is arranged parallel to the movable ring plate 21 , and the second blade 242 is arranged perpendicular to the first blade 241 .

[0048] Specifically, when sewage passes through, the spiral sewage will be tangent to the second blade 242, and then the movable ring plate 21 will rotate, while the first blade 241 will fit against the inner wall of the circulation pipe 1, grinding and colliding the bubbles in the sewage during the rotation process, thereby breaking them.

[0049] As another embodiment further provided by the present invention, a plurality of MBR membrane tubes 25 arranged in a circular array are spirally surrounded by a spiral aeration tube 22 with a fixed mounting portion at one end; the spiral aeration tube 22 is provided with air holes facing the MBR membrane tube 25 and arranged obliquely along the direction of water flow, and the air holes are used to guide the spiral flow of sewage.

[0050] Specifically, because the aeration holes of the spiral aeration tube 22 are set, the sewage entering the circulation tube 1 will impact the MBR membrane tube 25 under the action of the airflow, so that the sewage is surrounded at the MBR membrane tube 25, increasing the contact with the MBR membrane tube 25.

[0051] As another embodiment further provided by the present invention, a mesh net 23 is spirally arranged around the outer periphery of the spiral aeration tube 22. The mesh net 23 has a cross-sectional radius of 3 cm and a diamond-shaped mesh structure, and is woven with 0.03 mm stainless steel wire.

[0052] Specifically, the air column of the spiral aeration tube 22 will impact the mesh 23, thereby forming a large number of bubbles suspended in the mesh 23, and the sewage will be taken away when passing through.

[0053] As another embodiment further provided by the present invention, a guide cavity 31 is opened on the movable ring plate 21 , and the guide cavity 31 is connected to a platform-shaped guide shell 32 .

[0054] The platform-shaped guide shell 32 is provided with a plurality of drainage holes 33 arranged in a circumferential array, and the spoiler paddles 34 rotate circumferentially in the drainage holes 33 .

[0055] Specifically, when sewage passes through, it will enter the sewage hole 33, thereby driving the spoiler paddle 34 to rotate. The spoiler paddle 34 breaks the bubbles while accelerating the rotation of the movable ring plate 21, so that the breaking effect brought by the rotation of the movable ring plate 21 is maximized.

[0056] As another embodiment further provided by the present invention, a plurality of MBR membrane tubes 25 arranged in a circular array are spirally surrounded by a spiral heating ring 26 on a fixed mounting portion at one end; the spiral heating ring 26 is arranged in the water outlet direction.

[0057] Specifically, the oxygen content of the sewage arriving here is the highest at this time, and the spiral heating ring 26 is used to maintain the water temperature at 50°C, so that the microbial activity in the sewage is maximized under sufficient oxygen and at a suitable temperature, thereby accelerating the sewage reaction efficiency and shortening the treatment cycle.

[0058] Example 2

[0059] A method for treating MBR wastewater, applied to the MBR wastewater treatment device described in the above embodiment, comprises the following steps:

[0060] S01, the sewage pump is running to draw sewage from the sewage supply pipe 4 from the center of the bottom of the sewage pool into the parallel pipe 6, and then discharge it into the circulation pipe 1;

[0061] S02. The sewage entering the circulation pipe 1 passes through the MBR membrane tube 25 and is aerated by the spiral aeration pipe 22, causing the sewage to rotate. A surrounding flow is also formed near the MBR membrane tube 25, and the injected bubbles are hung on the mesh 23, so that the sewage passing through carries a large amount of oxygen bubbles.

[0062] S03. The sewage continues to flow through the first stirring assembly 2. Since the sewage rotates, it drives the movable ring plate 21 to rotate, thereby driving the straight-edged paddle members 24 to break up a large number of oxygen bubbles and dissolve them in the sewage.

[0063] S04. In the above step 3, sewage flows back into the MBR membrane tube 25 and drives the spoiler 34 in the second stirring component 3 to rotate, thereby accelerating the rotation speed of the first stirring component 2. At the same time, the spoiler 34 also breaks up a large number of oxygen bubbles and dissolves them in the sewage.

[0064] S05. After being crushed, the water enters the spiral heating ring 26 to keep the water temperature at 50°C, and then is discharged into the convection pipe 5 and finally discharged. The water flow directions of the two rows of convection pipes 5 impact each other, and finally the liquid in the sewage pool is disturbed and circulated.

[0065] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An MBR sewage treatment plant, characterized in that: It comprises a circulation pipe (1) in which is arranged: MBR membrane tubes (25) are arranged in a circumferential array, and a centrally arranged mounting portion is provided on the plurality of MBR membrane tubes (25); A first stirring assembly (2), comprising a movable ring plate (21) rotatably mounted on a mounting portion, wherein a plurality of straight-edged paddle elements (24) arranged in a circumferential array are fixedly mounted on the movable ring plate (21); A second stirring assembly (3), comprising a platform-shaped flow guide shell (32) fixedly mounted on the movable ring plate (21), wherein a plurality of turbulent paddles (34) are circumferentially rotatably arranged on the platform-shaped flow guide shell (32); A spiral aeration pipe (22) having one end fixed to the mounting portion is spirally arranged around the periphery of the plurality of MBR membrane tubes (25) arranged in a circumferential array; The spiral aeration tube (22) is provided with air holes that are arranged obliquely toward the MBR membrane tube (25) and along the water flow direction, and the air holes are used to guide the sewage to flow in a spiral. A mesh net (23) is provided around the outer spiral of the spiral aeration pipe (22), wherein the mesh net (23) has a cross-sectional radius of 3 cm and a diamond-shaped mesh structure and is woven with 0.03 mm stainless steel wire; A flow guide cavity (31) is provided on the movable ring plate (21), and the flow guide cavity (31) is connected to a platform-shaped flow guide shell (32); The platform-shaped guide shell (32) is provided with a plurality of drainage holes (33) arranged in a circumferential array, and the spoiler paddles (34) rotate circumferentially in the drainage holes (33); A spiral heating ring (26) is provided spirally around the periphery of the plurality of MBR membrane tubes (25) arranged in a circumferential array, one end of which is fixed on the mounting portion; The spiral heating ring (26) is arranged in the water outlet direction; It also includes parallel pipes (6) arranged at the bottom of the sewage pool and arranged in contact with the pool walls on both sides, a plurality of the circulation pipes (1) are located on adjacent sides of the two parallel pipes (6), and the water outlets of the circulation pipes (1) are fixedly connected to convection pipes (5) arranged upward in a vertical direction, and the water outlets of the two rows of convection pipes (5) are arranged adjacent to each other; A sewage supply pipe (4) arranged between the plurality of circulation pipes (1) is connected between the two parallel pipes (6).

2. A MBR sewage treatment plant according to claim 1, characterized in that, The straight-edged paddle member (24) is divided into a first blade (241) and a second blade (242) according to the structure. The first blade (241) is arranged parallel to the movable ring plate (21), and the second blade (242) is arranged perpendicular to the first blade (241).

3. A method for treating MBR wastewater, applied to the MBR wastewater treatment device according to any one of claims 1 to 2, comprising the following steps: S01, the sewage pump is running to draw sewage from the sewage supply pipe (4) from the center of the bottom of the sewage pool into the parallel pipe (6), and then discharge it into the circulation pipe (1); S02. The sewage entering the circulation pipe (1) passes through the MBR membrane tube (25) and is aerated by the spiral aeration tube (22), causing the sewage to rotate and forming a surrounding flow near the MBR membrane tube (25). The injected bubbles are hung on the mesh (23), so that the sewage passing through carries a large amount of oxygen bubbles. S03, the sewage continues to flow through the first stirring assembly (2), and because the sewage rotates, it drives the movable ring plate (21) to rotate, thereby driving the straight-blade paddle (24) to break up a large number of oxygen bubbles and dissolve them in the sewage; S04. In the above step S03, the sewage flows back from the MBR membrane tube (25) and drives the spoiler (34) in the second stirring assembly (3) to rotate, thereby accelerating the rotation speed of the first stirring assembly (2). At the same time, the spoiler (34) also breaks up a large number of oxygen bubbles and dissolves them in the sewage; S05, after being crushed, it enters the spiral heating ring (26), where the water temperature is maintained at 50°C, and then is discharged into the convection pipe (5) and finally discharged. The water flow directions of the two rows of convection pipes (5) impact each other, and finally the liquid in the sewage pool is disturbed and circulated.

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