Ultrafiltration membrane module with air scouring reinforcement structure

Abstract

The utility model relates to ultrafiltration membrane group device technical field discloses a kind of ultrafiltration membrane group devices with gas washing reinforced structure, comprising: ultrafiltration membrane assembly body, the bottom surface of the ultrafiltration membrane assembly body is fixedly installed with support chassis, the bottom surface of the support chassis is provided with several support plates, several The support plate is spaced distribution along the length direction of support chassis, the top surface of each support plate is provided with two fixing holes, the inner circular wall surface of the fixing hole is provided with rotating column, through the collaborative structure of inner spiral piece, outer spiral piece and rotating tube, after aeration bubble enters rotating tube, it can promote inner spiral piece to drive rotating column rotation, make gas-liquid form high-speed vortex, extend bubble and membrane surface contact time, while outer spiral piece expands water flow agitation range, eliminate membrane silk bundle gap's gas washing blind area;Compared with prior art single aeration structure, improve gas-liquid mixing uniformity, without additional increase aeration amount, can realize efficient membrane pollution control, reduce operating energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of ultrafiltration membrane module technology, and in particular to an ultrafiltration membrane module with an air washing enhancement structure. Background Technology

[0002] In the field of water treatment technology, ultrafiltration membrane modules are widely used in scenarios such as advanced municipal wastewater treatment, industrial wastewater reuse, and drinking water purification because they can efficiently remove pollutants such as colloids, microorganisms, and macromolecular organic matter from water. To alleviate membrane fouling during ultrafiltration membrane operation, air rinsing technology is used as a core auxiliary method. This involves introducing gas under the membrane module to form a bubble flow, which washes the membrane surface to remove pollutants and maintain stable membrane flux.

[0003] However, the gas washing structure of existing ultrafiltration membrane modules has obvious defects: Most ultrafiltration membrane modules use a single aeration disc to directly spray air, resulting in a straight upward path for the bubbles. This leads to poor gas-liquid mixing uniformity and short contact time between the bubbles and the membrane surface, which easily creates air-washing blind zones in the gaps between the membrane fibers. Consequently, the membrane fouling control effect is limited, requiring frequent increases in aeration to compensate for the deficiency, which significantly increases operating energy consumption. Therefore, this invention proposes an ultrafiltration membrane module with an air-washing enhancement structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an ultrafiltration membrane module with an air-washing enhancement structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An ultrafiltration membrane module with an air-washing enhancement structure includes: an ultrafiltration membrane module body; a support frame fixedly mounted on the bottom surface of the ultrafiltration membrane module body; a plurality of support plates disposed on the bottom surface of the support frame; the plurality of support plates being spaced apart along the length direction of the support frame; two fixing holes formed on the top surface of each support plate; a rotating column disposed on the inner circular wall of the fixing hole; an inner spiral blade fixedly mounted on the outer circular wall of the rotating column; a rotating tube fixedly mounted on the outer circular wall of the inner spiral blade; and an outer spiral blade fixedly mounted on the outer circular wall of the rotating tube; a bearing fixedly sleeved on the inner circular wall of the fixing hole; and the inner circular wall of the bearing fixedly sleeved on the outer circular wall of the rotating column; the bottom surface of the ultrafiltration membrane module body... Several fixing plates are fixedly installed on the inner side of the component. The top surface of the fixing plate has a support hole, and the inner circular wall of the support hole is movably sleeved with the outer circular wall of the rotating column. The bottom surface of the support plate has several second threaded holes, and the bottom surface of the support base has several first threaded holes at positions corresponding to the second threaded holes. Bolts are threaded to the inner circular wall of the second threaded holes, and the top of the bolts is threaded to the inner circular wall of the first threaded holes. A protective cover is fixedly installed on the bottom surface of the support plate corresponding to the position of the rotating column, and the protective cover is placed on the outer side of the bottom end of the rotating column. There is a 2cm gap between the top surface of the rotating tube and the bottom surface of the fixing plate, and between the bottom surface of the rotating tube and the top surface of the support plate.

[0006] As a further embodiment of this utility model, several of the support plates are evenly spaced along the length of the support base, and two fixing holes on the top surface of each support plate are symmetrically arranged along the width of the support plate, with the axes of the two fixing holes perpendicular to the top surface of the support plate.

[0007] As a further embodiment of this utility model, the inner circular wall of the fixing hole and the outer circular wall of the bearing are interference-fitted and fixedly connected, and the inner circular wall of the bearing and the outer circular wall of the rotating column are interference-fitted and fixedly connected, and the rotating column can rotate around its own axis in the fixing hole through the bearing.

[0008] As a further embodiment of this utility model, several fixing plates on the inner side of the bottom of the ultrafiltration membrane module body are distributed at intervals along the length direction of the rotating column, and the support hole on the top surface of each fixing plate is coaxially arranged with the rotating column, and the inner diameter of the support hole is 0.2-0.5mm larger than the outer diameter of the rotating column.

[0009] As a further embodiment of this utility model, a plurality of second threaded holes on the bottom surface of the support plate are evenly distributed along the circumference of the support plate, the first threaded holes and the second threaded holes on the bottom surface of the support base correspond one-to-one and are coaxially arranged, the threaded segments of the bolts pass through the second threaded holes in sequence and engage with the first threaded holes, and the bottom surface of the bolt nut is tightly fitted with the bottom surface of the support plate.

[0010] As a further embodiment of this utility model, the protective cover is a cylindrical structure with an open bottom. The top end face of the protective cover is fixedly connected to the bottom surface of the support plate. The inner diameter of the protective cover is 1-2 cm larger than the outer diameter of the rotating column. The height of the protective cover is not less than the length of the bottom end of the rotating column extending out of the bottom surface of the support plate.

[0011] As a further embodiment of this utility model, the bolt is made of stainless steel.

[0012] As a further embodiment of this utility model, there are no rigid connecting parts in the 2cm gap between the top surface of the rotating tube 15 and the bottom surface of the fixed plate, and in the 2cm gap between the bottom surface of the rotating tube and the top surface of the support plate, so that the rotating tube can rotate synchronously around its own axis with the rotating column.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the synergistic structure of the inner spiral blade, outer spiral blade, and rotating tube, the aeration bubbles enter the rotating tube and drive the inner spiral blade to rotate the rotating column, causing the gas and liquid to form a high-speed vortex, prolonging the contact time between the bubbles and the membrane surface. At the same time, the outer spiral blade expands the water flow agitation range and eliminates the air washing blind zone between the membrane filaments. Compared with the existing single aeration structure, it improves the uniformity of gas-liquid mixing, achieves efficient membrane fouling control without the need to increase the aeration volume, and reduces operating energy consumption.

[0014] 2. The detachable structure of the support plate and the support base frame is connected by bolts. When core components such as the rotating column and inner spiral blades need maintenance or replacement, the support plate can be removed simply by unscrewing the bolts. There is no need to disassemble the entire ultrafiltration membrane module body. The maintenance operation time is shortened, effectively reducing equipment downtime and improving the continuous operation utilization rate of the equipment.

[0015] 3. The interference fit design between the bearing and the fixed hole and the rotating column significantly reduces the rotational resistance of the rotating column and prevents jamming during operation. At the same time, the cylindrical protective cover covering the bottom of the rotating column can effectively prevent impurities in the water from entering the rotational fit gap, reduce component wear, extend the service life of the core components of the air washing system, and reduce equipment maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an ultrafiltration membrane module with an air-washing enhancement structure proposed in this utility model; Figure 2 This is a schematic diagram of the body structure of an ultrafiltration membrane module with an air-washing enhancement structure proposed in this utility model; Figure 3 This is a schematic diagram of the support frame structure of an ultrafiltration membrane module with an air washing enhancement structure proposed in this utility model; Figure 4This is a schematic diagram of the support plate structure of an ultrafiltration membrane module with an air washing enhancement structure proposed in this utility model; Figure 5 This is a schematic diagram of the rotating tube structure of an ultrafiltration membrane module with an air-washing enhancement structure proposed in this utility model; Figure 6 This is a schematic diagram of the outer spiral plate structure of an ultrafiltration membrane module with an air-washing enhancement structure proposed in this utility model; Figure 7 for Figure 6 A partial structural diagram of A in the middle; Figure 8 for Figure 5 A schematic diagram of the partial structure of B in the diagram.

[0017] In the figure: 1. Ultrafiltration membrane module body; 2. Support base frame; 3. Support plate; 4. Rotating column; 5. Inner spiral blade; 6. Outer spiral blade; 7. Fixing hole; 8. Fixing plate; 9. Supporting hole; 10. Bearing; 11. Protective cover; 12. First threaded hole; 13. Second threaded hole; 14. Bolt; 15. Rotating tube. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. In addition, the terms "first" and "second" 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 "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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] Reference Figures 1-8An ultrafiltration membrane module with an air-washing enhancement structure includes: an ultrafiltration membrane module body 1; a support frame 2 is fixedly mounted on the bottom surface of the ultrafiltration membrane module body 1; a plurality of support plates 3 are arranged on the bottom surface of the support frame 2, the plurality of support plates 3 are spaced apart along the length direction of the support frame 2; two fixing holes 7 are opened on the top surface of each support plate 3; a rotating column 4 is arranged on the inner circular wall of the fixing hole 7; an inner spiral blade 5 is fixedly mounted on the outer circular wall of the rotating column 4; a rotating tube 15 is fixedly mounted on the outer circular wall of the inner spiral blade 5; and an outer spiral blade 6 is fixedly mounted on the outer circular wall of the rotating tube 15; a bearing 10 is fixedly sleeved on the inner circular wall of the fixing hole 7, and the inner circular wall of the bearing 10 is fixedly sleeved with the outer circular wall of the rotating column 4; the bottom of the ultrafiltration membrane module body 1... Several fixing plates 8 are fixedly installed on the side. The top surface of the fixing plate 8 has a support hole 9. The inner circular wall of the support hole 9 is movably connected to the outer circular wall of the rotating column 4. Several second threaded holes 13 are opened on the bottom surface of the support plate 3. Several first threaded holes 12 are opened on the bottom surface of the support base 2 at the corresponding positions of the second threaded holes 13. Bolts 14 are threadedly connected to the inner circular wall of the second threaded holes 13. The top of the bolts 14 is threadedly connected to the inner circular wall of the first threaded holes 12. A protective cover 11 is fixedly installed on the bottom surface of the support plate 3 at the position corresponding to the rotating column 4. The protective cover 11 covers the outer side of the bottom end of the rotating column 4. There is a 2cm gap between the top surface of the rotating tube 15 and the bottom surface of the fixing plate 8, and between the bottom surface of the rotating tube 15 and the top surface of the support plate 3.

[0022] In this embodiment, several support plates 3 are evenly spaced along the length of the support base 2, and two fixing holes 7 on the top surface of each support plate 3 are symmetrically arranged along the width of the support plate 3. The axes of the two fixing holes 7 are perpendicular to the top surface of the support plate 3. The inner circular wall of the fixing hole 7 is interference-fitted with the outer circular wall of the bearing 10, and the inner circular wall of the bearing 10 is interference-fitted with the outer circular wall of the rotating column 4. The rotating column 4 can rotate around its own axis within the fixing hole 7 through the bearing 10. Several fixing plates 8 on the inner side of the bottom of the ultrafiltration membrane module body 1 are spaced along the length of the rotating column 4, and the support hole 9 on the top surface of each fixing plate 8 is coaxially arranged with the rotating column 4. The inner diameter of the support hole 9 is 0.2-0.5 mm larger than the outer diameter of the rotating column 4. Several second threaded holes 13 on the bottom surface of the support plate 3 are evenly distributed along the circumference of the support plate 3. The first threaded holes 12 and the second threaded holes 13 on the bottom surface of the support base 2 correspond one-to-one and are coaxially arranged. The threaded section of the bolt 14 passes through the second threaded holes 13 in sequence and engages with the first threaded hole 12. The bottom surface of the nut of the bolt 14 is in close contact with the bottom surface of the support plate 3.

[0023] In this embodiment, the protective cover 11 is a cylindrical structure with an open bottom. The top end face of the protective cover 11 is fixedly connected to the bottom surface of the support plate 3. The inner diameter of the protective cover 11 is 1-2 cm larger than the outer diameter of the rotating column 4. The height of the protective cover 11 is not less than the length of the bottom end of the rotating column 4 extending out of the bottom surface of the support plate 3. The bolt 14 is made of stainless steel, specifically 304 or 316 stainless steel. There are no rigid connecting parts in the 2 cm gap between the top surface of the rotating tube 15 and the bottom surface of the fixed plate 8, and in the 2 cm gap between the bottom surface of the rotating tube 15 and the top surface of the support plate 3. The rotating tube 15 can rotate synchronously with the rotating column 4 around its own axis.

[0024] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: The ultrafiltration membrane module body 1, when in use, is stably supported by the support frame 2. The support frame 2 has a pre-installed mounting flange on its exterior, allowing the entire ultrafiltration membrane module to be fixedly installed within the designated water treatment equipment. Simultaneously, an aeration group is fixedly installed on the bottom surface of the support frame 2. This aeration group includes several aeration discs. After connecting to an external air supply device, gas can be sprayed into the area below the ultrafiltration membrane module body 1 through the aeration discs, thus providing the air source required for air washing. The basic air supply structure of this aeration group is existing technology and will not be described further. Furthermore, the outlet of the ultrafiltration membrane module body 1 is connected to a conveying pipe. After extending out of the water treatment tank, the pipe connects to a negative pressure device. Through the negative pressure suction effect of the negative pressure device, the purified water from the ultrafiltration membrane module body 1 can be stably discharged.

[0025] Furthermore, the inner side of the ultrafiltration membrane module body 1 is provided with membrane fiber bundles. When the aeration disc in the aeration group sprays bubbles upward, some bubbles will enter the interior of the rotating tube 15. The impact force of the bubbles can drive the inner spiral blades 5 to move, thereby driving the rotating column 4 to rotate under the support of the bearing 10. The bearing 10 is fixedly sleeved between the fixing hole 7 of the support plate 3 and the rotating column 4, which can effectively reduce the rotational resistance of the rotating column 4 and ensure its stable rotation. At the same time, when the rotating column 4 rotates, it will synchronously drive the outer spiral blades 6 on the outside of the rotating tube 15 to rotate. The rotating inner spiral plate 5 drives the water flow and bubbles to form a high-speed rotating gas-liquid vortex. This gas-liquid vortex is evenly distributed along the membrane fiber bundle inside the ultrafiltration membrane module body. During the rising process, the bubbles will wash the membrane surface along the spiral trajectory attached to the surface of the membrane fiber bundle, which significantly prolongs the contact time between the bubbles and the membrane surface. This can not only enhance the gas-liquid mixing effect, but also break up large-sized bubbles through vortex shear force and improve bubble dispersion. The outer spiral plate 6 can further enhance the water flow agitation intensity, expand the contact range between the bubbles and the membrane fiber bundle, reduce the gas washing blind zone, and ultimately ensure the gas washing enhancement effect of the bubble flow on the ultrafiltration membrane module body 1.

[0026] When maintenance or replacement of parts is required, unscrew bolt 14 to disengage the bolt 14 from the first threaded hole 12 of the support base 2 and the second threaded hole 13 of the support plate 3. Then, the support plate 3 can be removed from the bottom of the support base 2, and the core components of the air washing strengthening, such as the rotating column 4, inner spiral blade 5, and outer spiral blade 6, installed on the support plate 3 can be disassembled. This facilitates subsequent maintenance or replacement operations and ensures the long-term stable functioning of the air washing strengthening structure.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An ultrafiltration membrane module with an air-washing enhancement structure, comprising: An ultrafiltration membrane module body (1), wherein a support frame (2) is fixedly mounted on the bottom surface of the ultrafiltration membrane module body (1), characterized in that: The bottom surface of the support frame (2) is provided with several support plates (3), which are spaced apart along the length of the support frame (2). Each support plate (3) has two fixing holes (7) on its top surface. A rotating column (4) is provided on the inner circular wall of the fixing hole (7). An inner spiral blade (5) is fixedly installed on the outer circular wall of the rotating column (4). A rotating tube (15) is fixedly installed on the outer circular wall of the inner spiral blade (5). An outer spiral blade (6) is fixedly installed on the outer circular wall of the rotating tube (15). A bearing (10) is fixedly sleeved on the inner circular wall of the fixing hole (7). The inner circular wall of the bearing (10) is fixedly sleeved with the outer circular wall of the rotating column (4). Several fixing plates (8) are fixedly installed on the bottom inner side of the ultrafiltration membrane assembly body (1). The top surface of the fixing plate (8) is provided with a support. Hole (9), the inner circular wall of the support hole (9) is movably sleeved with the outer circular wall of the rotating column (4); the bottom surface of the support plate (3) is provided with a number of second threaded holes (13), the bottom surface of the support base (2) is provided with a number of first threaded holes (12) corresponding to the second threaded holes (13), the inner circular wall of the second threaded hole (13) is threaded with a bolt (14), the top end of the bolt (14) is threaded with the inner circular wall of the first threaded hole (12); the bottom surface of the support plate (3) is fixedly installed with a protective cover (11) corresponding to the position of the rotating column (4), the protective cover (11) is covered on the outside of the bottom end of the rotating column (4); there is a 2cm gap between the top surface of the rotating tube (15) and the bottom surface of the fixed plate (8), and between the bottom surface of the rotating tube (15) and the top surface of the support plate (3).

2. The ultrafiltration membrane module with gas washing enhancement structure according to claim 1, characterized in that, Several support plates (3) are evenly spaced along the length of the support base (2), and two fixing holes (7) on the top surface of each support plate (3) are symmetrically arranged along the width of the support plate (3), and the axes of the two fixing holes (7) are perpendicular to the top surface of the support plate (3).

3. The ultrafiltration membrane module with gas washing enhancement structure according to claim 1, characterized in that, The inner wall of the fixing hole (7) is interference-fitted with the outer wall of the bearing (10), and the inner wall of the bearing (10) is interference-fitted with the outer wall of the rotating column (4). The rotating column (4) can rotate around its own axis in the fixing hole (7) through the bearing (10).

4. The ultrafiltration membrane module with gas washing enhancement structure according to claim 1, characterized in that, Several fixing plates (8) on the bottom inner side of the ultrafiltration membrane module body (1) are distributed at intervals along the length direction of the rotating column (4), and the support hole (9) on the top surface of each fixing plate (8) is coaxially arranged with the rotating column (4). The inner diameter of the support hole (9) is 0.2-0.5mm larger than the outer diameter of the rotating column (4).

5. An ultrafiltration membrane module with an air-washing enhancement structure according to claim 1, characterized in that, The second threaded holes (13) on the bottom surface of the support plate (3) are evenly distributed along the circumference of the support plate (3). The first threaded holes (12) on the bottom surface of the support base (2) correspond one-to-one with the second threaded holes (13) and are coaxially arranged. The threaded section of the bolt (14) passes through the second threaded holes (13) in sequence and then engages with the first threaded hole (12). The bottom surface of the nut of the bolt (14) is tightly attached to the bottom surface of the support plate (3).

6. The ultrafiltration membrane module with gas washing enhancement structure according to claim 1, characterized in that, The protective cover (11) is a cylindrical structure with an open bottom. The top end face of the protective cover (11) is fixedly connected to the bottom surface of the support plate (3). The inner diameter of the protective cover (11) is 1-2 cm larger than the outer diameter of the rotating column (4). The height of the protective cover (11) is not less than the length of the bottom end of the rotating column (4) extending out of the bottom surface of the support plate (3).

7. An ultrafiltration membrane module with an air-washing enhancement structure according to claim 1, characterized in that, The bolt (14) is made of stainless steel.

8. An ultrafiltration membrane module with an air-washing enhancement structure according to claim 1, characterized in that, There are no rigid connecting parts in the 2cm gap between the top surface of the rotating tube (15) and the bottom surface of the fixed plate (8), and in the 2cm gap between the bottom surface of the rotating tube (15) and the top surface of the support plate (3). The rotating tube (15) can rotate synchronously around its own axis with the rotating column (4).

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