CN202246223U - Aeration device, positioning frame and aeration equipment - Google Patents

Abstract

The utility model discloses a dull and stereotyped membrane module aeration equipment of MBR, aeration equipment's locating rack and aeration equipment. This aeration equipment includes a center tube and a plurality of branch pipes, this center tube includes the unit section of a plurality of mutual end to end grafting, every unit section all includes a grafting outer tube that links to each other in proper order, a main part pipe and a grafting inner tube, be equipped with at least one opening on this grafting outer tube, the pipe wall outside of this grafting inner tube is equipped with at least one lug, the grafting inner tube of every unit section all pegs graft closely in the grafting outer tube of adjacent unit section, and the lug of every unit section inlays in the opening of adjacent unit section with all adapting. The positioning frames of the aeration device are assembled at two ends of the aeration device and fixed at the lower part of the gas diffusion chamber of the flat membrane component. The utility model discloses can guarantee aeration equipment's installation levelness with higher accuracy under the condition of segmentation preparation center tube.

Description

Aeration device, positioning frame and aeration equipment

technical field

The utility model relates to an aeration device, in particular to an MBR (Membrane Bioreactor, Membrane Bioreactor) flat membrane module aeration device, a positioning frame of the MBR flat membrane module aeration device and a device including the MBR The flat membrane module aeration device and the MBR flat membrane module aeration equipment of the positioning frame.

Background technique

Membrane bioreactor is a new type of high-efficiency sewage treatment process that combines high-efficiency membrane separation technology with traditional biological methods. treatment of organic industrial wastewater.

The key component of the MBR process is the membrane module, and aeration is the most important parameter in the design and operation of the MBR. Throughout the MBR process, aeration is required for biological treatment, sludge agitation and membrane flushing. Generally speaking, the aeration device used for biological treatment usually adopts a microporous aerator, which produces fine air bubbles that can improve the oxygen transfer rate; while sludge agitation and membrane flushing usually use a perforated aeration device. The air bubbles released by the perforated aeration can lift the sludge mixture in the sewage treatment tank and make it pass through the membrane module channel. These air bubbles can also induce liquid flow turbulence and instantaneous tangential shear force. The tangential shear force on the membrane surface Shearing force can prevent larger particles from depositing on the membrane surface and play a role in scouring the membrane surface, thereby slowing down membrane fouling and enhancing membrane permeability.

In the existing MBR system, it is usually necessary to provide a complete aeration system to produce the large bubble aeration required by the flat membrane module. The aeration system first needs to be equipped with an air source, and the air supply volume of this air source should be able to meet the total air volume required by the large bubble aeration and micropore aeration of the entire MBR system. The gas supply from the gas source is transported through the central main pipe to the central sub-pipes used to enter each flat membrane module, and each central sub-pipe is used to further transport the gas supply to the aeration equipment located at the lower part of the gas diffusion chamber of each flat membrane module. The aeration equipment generally includes an aeration device for exhausting air in the membrane biological reaction tank to achieve uniform aeration, and a positioning frame for fixing the aeration device on the angle steel plate at the lower part of the gas diffusion chamber.

Existing aeration devices generally include a central pipe and a plurality of branch pipes communicating with the central pipe. The extension directions of the branch pipes are all perpendicular to the extension direction of the central pipe, and the branch pipes all extend in the same plane. In actual use, the center pipe and these branch pipes need to be installed under the flat membrane module at a very high level, because once a horizontal inclination difference is generated between the branch pipes on both sides of the center pipe during installation, it will be As a result, the exhaust volume of the branch pipe on the higher side is relatively large, while the exhaust volume of the branch pipe on the lower side is relatively small, resulting in uneven aeration. This puts forward certain requirements for the design of the positioning frame of the aeration device, how to reliably fix the aeration device on the angle steel plate at the lower part of the gas diffusion chamber, and ensure the installation level of the aeration device more conveniently and quickly has become an urgent problem to be solved.

In addition, in order to eliminate some defects of the existing aeration device, the applicant proposed an improved aeration device. Since the central tube of the aeration device has a certain internal structure, the central tube is difficult to The central tube is integrally formed. Therefore, the applicant proposes that the central pipe can be manufactured by segmented molding, wherein the pipe wall of each segment is connected with several above-mentioned branch pipes extending in the same plane. However, in this way, how to ensure that all the branch pipes on each section extend in the same plane when splicing each section into the entire central pipe, so as to ensure that there will be no horizontal inclination between the branch pipes after the aeration device is installed Poorness is another thorny issue.

Utility model content

The technical problem to be solved by the utility model is to overcome the defect that it is difficult to ensure the installation level of the aeration device in the prior art when making and installing the aeration device, and to provide a method that can produce the center pipe in sections with a higher The MBR flat membrane module aeration device whose accuracy guarantees the installation level of the aeration device, a positioning frame of the MBR flat membrane module aeration device, and a MBR flat membrane module aeration device including the MBR flat membrane module aeration device and the positioning frame Flat membrane module aeration equipment.

The utility model solves the above-mentioned technical problems through the following technical solutions: an MBR flat membrane module aeration device, which includes a central pipe and a plurality of branch pipes, and is characterized in that the central pipe includes a plurality of mutual end-to-end plugging Each unit segment includes a plug-in outer tube, a main body tube, and a plug-in inner tube connected in sequence, and the tube wall of the main body tube is connected with a plurality of branch tubes extending in the same plane. At least one opening is provided on the wall of the end of the plug-in outer tube far away from the main body tube, and at least one lug is provided on the outside of the tube wall of the end of the plug-in inner tube connected to the main body tube. The at least one lug is located at the same position in the circumferential direction of the cross-section of the unit segment, the length of the inserting outer tube is the same as that of the inserting inner tube, and the inserting inner tube of each unit segment is tightly inserted into the The adjacent unit segments are inserted into the outer tube, and the lugs of each unit segment are fitfully embedded in the openings of the adjacent unit segments.

Preferably, each unit segment has two openings and two protrusions.

Preferably, the line connecting the two openings of each unit segment and the line connecting the two lugs are along the same diameter direction of the cross-sectional circumference of the unit segment.

Preferably, the same diameter is parallel to the extension planes of the plurality of branch pipes.

Preferably, the central pipe is made of engineering plastics.

Preferably, the material of the central pipe is ABS (acrylonitrile-styrene-butadiene copolymer) or UPVC (rigid polyvinyl chloride).

The purpose of this utility model is also to provide a positioning frame for the aeration device of the above-mentioned MBR flat membrane module. A positioning plate fixedly connected with the positioning outer tube and the flange connecting tube, at least one opening is arranged on the wall of the end of the positioning outer tube away from the flange connecting tube, each of the positioning outer tube and the central tube The length of the inserting inner tubes of each unit section is the same, the inner diameter of the positioning outer tube can be tightly inserted by the inserting inner tube at one end of the central tube, and the opening of the positioning outer tube can be used for the lugs of the inserting inner tube are fitly embedded, and the position of the opening of the positioning outer tube on the cross-sectional circumference of the positioning outer tube makes the plurality of branch tubes extend horizontally.

Preferably, the positioning outer tube and the flange connection upper hoop have a positioning ring, and the positioning ring is fixedly connected with the positioning plate.

Preferably, the opening of the positioning outer tube and the number of openings and protrusions of each unit section of the central tube are two.

Preferably, the connecting line of the two openings of the positioning outer tube is along the diameter direction of the cross-sectional circumference of the positioning outer tube, the connecting line of the two openings of each unit section of the central tube and the connecting line of the two lugs The lines are all along the same diameter direction of the cross-sectional circumference of the unit segment.

Preferably, the line connecting the two openings of the positioning outer tube and the same diameter are parallel to the extension planes of the plurality of branch tubes.

Preferably, the positioning frame and the center pipe are made of the same engineering plastics.

Preferably, the materials of the positioning frame and the central pipe are both ABS or UPVC.

The purpose of this utility model is also to provide an MBR flat membrane module aeration equipment, which is characterized in that it includes an above-mentioned MBR flat membrane module aeration device, a connecting pipe, at least one positioning piece and two above-mentioned positioning frames, the center The inserting inner tube at one end of the tube is tightly inserted into the positioning outer tube of one of the two positioning frames, and the lug of the inserting inner tube fits into the opening of the positioning outer tube. The two ends of the tube are respectively tightly inserted into the insertion outer tube at the other end of the central tube and the positioning outer tube of the other positioning frame of the two positioning frames, and the openings of the insertion outer tube and the positioning outer tube are mutually connected. aligned, and the at least one positioning piece is fitfully embedded in each pair of mutually aligned openings.

Preferably, the positioning frame, the central tube, the connecting tube and the positioning piece are made of the same engineering plastics.

Preferably, the positioning frame, the central pipe, the connecting pipe and the positioning piece are all made of ABS or UPVC.

The positive progressive effect of the utility model is that: the utility model adopts the method of section production to manufacture the central tube of the aeration device, thereby not only realizing the precise machining of the detailed structure of the central tube, but also ensuring the obtained The central tube can be adapted to various size requirements in different application occasions. In addition, each unit section of the central tube is designed with a unique plug-in structure, which not only facilitates reliable and convenient plug-in fixation between adjacent unit sections, but also ensures that after plugging, All branch pipes on adjacent unit segments are strictly located in the same extension plane. In addition, the utility model also designs a unique plug-in structure on the positioning frame. This plug-in structure not only facilitates reliable and convenient plug-in fixing between the central tube and the positioning frame, but also can directly and conveniently ensure The central pipe and the branch pipes thereon are all in a horizontal position after the plugging is completed.

Description of drawings

Fig. 1 is a side view of a unit section of the MBR flat membrane module aeration device of the present invention.

Fig. 2 is a top view of a unit section of the MBR flat membrane module aeration device of the present invention.

Fig. 3 is a side view of the positioning frame of the MBR flat membrane module aeration device of the present invention.

Fig. 4 is a top view of the positioning frame of the MBR flat membrane module aeration device of the present invention.

Fig. 5 is an installation side view of the MBR flat membrane module aeration device of the present invention.

Detailed ways

The preferred embodiments of the utility model are given below in conjunction with the accompanying drawings to describe the technical solution of the utility model in detail.

The MBR flat membrane module aeration device of the utility model also includes a center pipe and a plurality of branch pipes similarly to the prior art, but different from the prior art, the center pipe in the utility model is composed of a plurality of mutual It is composed of unit segments plugged end to end.

The structure of a unit segment is schematically depicted in FIGS. 1 and 2 . Each unit section includes a plug-in outer tube 1, a main body tube 2, and a plug-in inner tube 3 connected in sequence, wherein the tube wall of the main body tube 2 is connected with several above-mentioned branch tubes 21 extending in the same plane , and the number of branch pipes 21 communicated on each main pipe 2 can be flexibly designed according to the length of each unit section and the required aeration intensity, and is not limited by Fig. 1 and Fig. 2 .

At least one opening 11 is provided on the tube wall of the plug-in outer tube 1, and the opening 11 is located at an end of the plug-in outer tube 1 away from the main body tube 2, that is, the opening 11 is at the end of the plug-in outer tube 1 The ends are open. At the same time, at least one protruding piece 31 is provided on the outside of the tube wall of the inserting inner tube 3 , and the protruding piece 31 is located at one end of the inserting inner tube 3 connected with the main body tube 2 . Although the at least one opening 11 and the at least one lug 31 are respectively located at the two ends of the unit segment, their positions are exactly the same in the circumferential direction of the cross section of the unit segment, that is, for each opening 11 In other words, at the same position in the circumferential direction of the cross section of the unit segment, there must be a tab 31 corresponding to it, that is to say, when two unit segments are placed in the same posture, for one of the unit segments For each opening 11 of the two unit segments, at the same position in the circumferential direction of the cross-section of the two unit segments, there must be a corresponding protrusion 31 on the other unit segment.

Each pair of corresponding openings 11 and the shapes of the lugs 31 are adapted to each other, that is, to meet: when two unit segments are placed with the same posture, each lug 31 on one of the unit segments can be adapted from the other. The open side of the corresponding opening 11 on the unit segment is inserted and fitted into the opening 11 . In addition, the lengths of the inserting outer tube 1 and the inserting inner tube 3 of each unit segment are the same, and the relationship between the inner diameter of the inserting outer tube 1 and the outer diameter of the inserting inner tube 3 should satisfy : the insertion inner tube 3 of one unit section can be tightly inserted into the insertion outer tube 1 of another unit section.

When the two above-mentioned unit sections are inserted into each other with the same posture, the insertion inner tube 3 of the previous unit section can be tightly inserted into the insertion outer tube 1 of the latter unit section, and the insertion of the previous unit section Each protruding piece 31 can be fitly inserted and embedded in each opening 11 of the next unit segment.

The present invention does not limit the number of corresponding openings 11 and lugs 31 as well as the distribution range and specific positions in the circumferential direction of the cross-section of the unit segment. When the design quantity of the openings 11 and the protruding pieces 31 is large, the reliability of the connection between the inter-plugged unit segments will be higher. However, as the design quantity increases, the manufacturing difficulty of the unit segments will increase. In addition, in the circumferential direction of the cross-section of the unit segment, when the openings 11 and the lugs 31 are evenly distributed on the entire circumference of the cross-section, the reliability of the connection between the unit segments inserted into each other will be higher, and when When they are only distributed within a narrow arc range of the entire cross-sectional circumference, the connection reliability will be relatively reduced. As for the specific positions of the openings 11 and the lugs 31 in the circumferential direction of the cross-section of the unit segment, it can be flexibly designed for the purpose of easy manufacturing of the unit segment and convenient insertion between the unit segments. For example, in Fig. 1 and Fig. 2, two openings 11 and two protruding pieces 31 are selected and designed on each unit segment, and their specific positions are: the connection line of the two openings 11 and the two protruding pieces The connecting lines of 31 are all along the same diameter direction of the cross-sectional circumference of the unit segment, and the same diameter direction is parallel to the extension plane of the plurality of branch pipes connected to the unit segment.

Based on the special structure of the above-mentioned unit segments, only when two of the above-mentioned unit segments are close to each other in the same posture can they be successfully inserted by relying on the corresponding openings and tabs, which also ensures that: no matter how many such unit segments Connected end-to-end, the postures of all branch pipes connected on the formed pipeline will be completely the same, that is, all branch pipes extend in the same plane.

Referring to Fig. 5, when a plurality of above-mentioned unit sections are plugged end to end to form the entire center pipe in the aeration device, the center pipe will be different from the common center pipe, and the structures at both ends of the center pipe are different. Symmetrical, one end is the plug-in outer pipe of one unit segment, and the other end is the plug-in inner tube of another unit segment, so the positioning frame of the ordinary aeration device will no longer be suitable for the aeration device of the present utility model. Instead of fixing the aeration device, the positioning frame of the MBR flat membrane module aeration device proposed by the utility model should be used.

As shown in FIG. 3 and FIG. 4 , the positioning frame of the present invention includes a fixed frame, a positioning outer tube 4 and a flange connection 5 connected thereto. The fixed frame includes a positioning plate 6 that is fixedly connected with the positioning outer tube 4 and the flange adapter 5. The fixing here can adopt various structures, for example, it can be connected between the positioning outer tube 4 and the flange adapter 5. A positioning ring 61 is provided on the upper hoop, and the positioning ring 61 is fixedly connected to the positioning plate 6 . The positioning plate 6 can be installed on the angle steel plate at the lower part of the gas diffusion chamber by, for example, bolting, and a pair of screw holes 62 are drawn as an example in FIG. 4 .

The structure of the positioning outer tube 4 is completely similar to the structure of the inserting outer tube 1 of the above-mentioned unit segment. That is, the tube wall of the positioning outer tube 4 is provided with at least one opening 41 that is open on one side, and the opening 41 is located at the end of the positioning outer tube 4 away from the flange connection 5, and the positioning outer tube The length of 4 is identical with the length of the insertion inner pipe 3 of above-mentioned unit section. The inner diameter of the positioning outer tube 4 satisfies: the insertion inner tube 3 of the above-mentioned unit segment can be inserted tightly; in addition, the shape of the opening 41 of the positioning outer tube 4 and the circumferential direction of the cross section of the positioning outer tube 4 The distribution is then satisfied: each lug 31 of the insertable inner tube 3 of the above-mentioned unit section is fitly inserted from the open side of each opening 41 respectively, and fitly embedded in each opening 41, and when fitting After the embedding is complete, and under the condition that the final installation posture of the positioning plate 6 is determined, ensure that the extension planes of the branch pipes connected to the above-mentioned unit sections are the standard horizontal planes required for ideal aeration. For example, when the openings and lugs on the unit segment are designed as shown in Figures 1 and 2, the openings on the positioning outer tube 4 must be designed as shown in Figures 4 and 5.

For the aeration device of the present utility model, when it needs to be assembled with the positioning frame of the present utility model to form a complete aeration device, the assembly method is as follows.

Referring to Figure 5, the aeration equipment needs to include two above-mentioned positioning frames to respectively fix the two ends of the central tube of the aeration device, wherein the central tube in Figure 5 is only schematically represented by two dotted lines A unit segment structure indicating the connection position.

For the end of the central tube that is inserted into the inner tube 3 structure: align the position of each lug 31 on the end with the position of each opening 41 on the positioning outer tube 4, then insert the end tightly into the Positioning inside the outer tube 4 , wherein the lugs 31 will be fittingly inserted from the open sides of the openings 41 and fittingly embedded in the openings 41 . After the positioning frame is installed on the angle steel plate of the gas diffusion chamber, the end of the central tube is fixed.

For the end of the central tube that is inserted into the outer tube 1, in addition to using the above-mentioned positioning frame, it is also necessary to use a connecting tube 7 and at least one positioning piece 8 in combination to complete the fixing of this end. Wherein, the outer diameter of the connecting tube 7 should be able to be tightly inserted into the inserting outer tube 1 and the positioning outer tube 4, and the shape of the positioning piece 8 should be able to be fitfully embedded in a pair of opposing In the above-mentioned openings, and the number of the positioning pieces 8 should be consistent with the number of openings 41 on the positioning outer tube 4 of the positioning frame. The two ends of this connecting pipe 7 are respectively tightly inserted in this end of the central tube and in the positioning outer tube 4 of the positioning frame, and then the positions of the openings 11 on the end are compared with the positions of the positioning outer tubes 4. The positions of the openings 41 are aligned with each other, and finally the connection between the end of the central tube and the positioning frame is completed by fitting each positioning piece 8 into each pair of aligned openings. After the positioning frame is installed on the angle steel plate of the gas diffusion chamber, the end of the central tube is fixed.

It can be seen from this that each opening 41 on the positioning outer tube 4 of the positioning frame of the present utility model will ensure that: the center tube of the aeration device of the present utility model can only be installed in the gas with the correct posture. Lower part of the diffusion chamber.

Hereinafter, the installation method of the aeration device of the present invention will be fully described with reference to FIG. 5 .

S1. Apply adhesive on the inner wall of the plug-in outer tube 1 and the outer wall of the plug-in inner tube 3 of multiple unit segments, and then plug the multiple unit segments end-to-end to form a central tube, each of which The lugs 31 of the unit segments are fitly embedded in the openings 11 of the adjacent unit segments.

S2. As shown in the right part of Fig. 5, paint adhesive on the outer wall of the inner tube 3 inserted at one end of the center tube and the inner wall of the outer tube 4 of a positioning frame, and then insert the inner tube The tube 3 is inserted into the positioning outer tube 4, wherein each lug 31 of the plug-in inner tube 3 is fitly embedded in each opening 41 of the positioning outer tube 4, and ensures that the positioning plate 6 of the positioning frame is in contact with each The branch pipes 21 are all located on the same side of the central pipe, that is, in Fig. 5, since each branch pipe 21 is located at the lower side of the central pipe, the positioning plate 6 of the spacer should be located at the lower side of the central pipe.

S3, as shown in the left part of Fig. 5, on the inner wall of the plugged outer tube 1 at the other end of the central tube, on the inner wall of the positioning outer tube 4 of another positioning frame, and on the outer wall of a connecting tube 7, paint and glue Then insert the two ends of the connecting pipe 7 into the inserting outer tube 1 and the positioning outer tube 4 respectively, wherein each opening 11 of the inserting outer tube 1 and each opening of the positioning outer tube 4 are connected to each other respectively. Align, and ensure that the positioning plate 6 of the other positioning frame and the positioning plate 6 of the positioning frame in step S2 are all located on the same side of the central tube, that is, in FIG. 5, they are all located on the lower side of the central tube.

S4. Still as shown in the left part of FIG. 5, apply adhesive on the required number of connecting pieces 8, and insert them into each pair of mutually aligned openings respectively, so as to be finally bonded to the connecting pipe 7 on the outside of the pipe wall.

S5. Fix the positioning plates 6 of the two positioning frames on the angle steel plates at both ends of the bottom of the gas diffusion chamber respectively. At this time, the fixing process of the aeration device in the utility model is completed. Thereafter, in order to supply air to the aeration device of the aeration device to perform aeration, the two flanges 5 of the two positioning frames are connected to the air flow pipes outside the aeration device by using flanges 9 respectively. Can.

In the present utility model, the material of the center pipe, the positioning frame, the connecting pipe and the positioning sheet can be various engineering plastics, such as ABS or UPVC, etc., but the central pipe, the positioning frame, the connecting pipe And the material of the positioning sheet must be the same, so that the bonding between the unit segments of the central tube and the bonding between the central tube and the positioning frame can be achieved by using a special adhesive for this material.

In a specific application, for example, the following size parameters can be selected: the length of each unit section is 26-30cm, the outer diameter of each unit section's plug-in outer tube and the positioning outer tube of the positioning frame are 82mm, and the inner diameter is 82mm. 75.1mm, 35mm in length, 3.5mm in wall thickness, and the outer diameter of the plug-in inner tube is 75mm, and the length is 35mm, and the opening on the positioning outer tube and the length of the opening and lug on each unit segment Both are 20mm, width is 8mm, depth (or thickness) is 3.5mm, the outer diameter of the flange connection is 75mm to be suitable for connecting with a standard flange of 2 inches and a half, the outer diameter of the connecting pipe is 75mm, and the length is 70mm, the length of the positioning piece is 40mm, the width is 8mm, and the thickness is 3.5mm.

To sum up, the utility model adopts the method of section production to manufacture the central tube of the aeration device, thereby not only realizing the precise machining of the detailed structure of the central tube, but also ensuring that the prepared central tube can Suitable for various size requirements in different applications. In addition, each unit section of the central tube is designed with a unique plug-in structure, which not only facilitates reliable and convenient plug-in fixation between adjacent unit sections, but also ensures that after plugging, All branch pipes on adjacent unit segments are strictly located in the same extension plane. In addition, the utility model also designs a unique plug-in structure on the positioning frame. This plug-in structure not only facilitates reliable and convenient plug-in fixing between the central tube and the positioning frame, but also can directly and conveniently ensure The central pipe and the branch pipes thereon are all at the same horizontal position after the plugging is completed.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (16)

1. A kind of MBR flat membrane module aeration device, it comprises a central pipe and a plurality of branch pipes, it is characterized in that, this central pipe comprises a plurality of mutual unit sections plugged in end to end, each unit section all comprises a successively connected Inserting an outer tube, a main body tube and an inserting inner tube, the tube wall of the main tube communicates with a plurality of branch tubes extending in the same plane, the tube wall of the end of the plugging outer tube away from the main tube At least one opening is provided on the inner tube, and at least one lug is provided on the outside of the tube wall at the end of the plug-in inner tube connected to the main body tube, and the at least one opening and the at least one lug are located in the circumferential direction of the cross section of the unit section At the same position on the top, the length of the plug-in outer tube and the plug-in inner tube is the same, and the plug-in inner tube of each unit segment is tightly plugged into the plug-in outer tube of the adjacent unit segment, and each unit The tabs of each segment fit snugly into the openings of adjacent unit segments. 2. The MBR flat membrane module aeration device according to claim 1, wherein the number of openings and fins of each unit section is two. 3. MBR flat membrane module aeration device as claimed in claim 2, is characterized in that, the connection line of two openings of each unit section and the connection line of two fins are all along the cross-sectional circumference of this unit section. same diameter direction. 4. The MBR flat membrane module aeration device according to claim 3, wherein the same diameter is parallel to the extension planes of the plurality of branch pipes. 5. The MBR flat membrane module aeration device according to any one of claims 1-4, characterized in that the central pipe is made of engineering plastics. 6. The MBR flat membrane module aeration device according to any one of claims 1-4, characterized in that, the central pipe is made of ABS or UPVC. 7. A positioning frame of an MBR flat membrane module aeration device as claimed in claim 1, wherein the positioning frame includes a fixed frame and a connected positioning outer pipe and a flange connection, and the fixed frame includes A positioning plate fixedly connected with the positioning outer tube and the flange connecting tube, at least one opening is arranged on the wall of the end of the positioning outer tube away from the flange connecting tube, each of the positioning outer tube and the central tube The length of the inserting inner tubes of each unit section is the same, the inner diameter of the positioning outer tube can be tightly inserted by the inserting inner tube at one end of the central tube, and the opening of the positioning outer tube can be used for the lugs of the inserting inner tube are fitly embedded, and the position of the opening of the positioning outer tube on the cross-sectional circumference of the positioning outer tube makes the plurality of branch tubes extend horizontally. 8. The positioning frame of the MBR flat membrane module aeration device as claimed in claim 7, wherein a positioning ring is hooped on the positioning outer pipe and the flange connecting pipe, and the positioning ring is fixedly connected to the positioning plate. 9. the positioning frame of the MBR flat membrane module aeration device as claimed in claim 7, is characterized in that, the opening of this positioning outer pipe and the opening of each unit section of this center pipe and the number of protrusions are two . 10. the positioning frame of the MBR flat membrane module aeration device as claimed in claim 9, is characterized in that, the connection line of two openings of this positioning outer tube is along the diameter direction of the cross-section circumference of this positioning outer tube, and the center The line connecting the two openings and the two lugs of each unit segment of the tube is along the same diameter direction of the cross-sectional circumference of the unit segment. 11. The positioning frame of the MBR flat membrane module aeration device according to claim 10, characterized in that, the line connecting the two openings of the positioning outer tube and the same diameter are parallel to the extension plane of the plurality of branch tubes. 12. The positioning frame of the MBR flat membrane module aeration device according to any one of claims 7-11, characterized in that, the material of the positioning frame and the center pipe are the same engineering plastics. 13. The positioning frame of the MBR flat membrane module aeration device according to any one of claims 7-11, wherein the materials of the positioning frame and the center pipe are both ABS or UPVC. 14. An MBR flat membrane module aeration device is characterized in that it comprises an MBR flat membrane module aeration device as claimed in claim 1, a connecting pipe, at least one positioning piece and two as claimed in claim 7 The positioning frame of the central tube, the inserting inner tube at one end of the central tube is tightly inserted into the positioning outer tube of one of the two positioning frames, and the tab of the inserting inner tube is fitfully embedded in the positioning outer tube In the opening of the opening, the two ends of the connecting pipe are respectively tightly inserted into the insertion outer tube at the other end of the central tube and the positioning outer tube of the other positioning bracket of the two positioning brackets, and the insertion outer tube and the The openings for positioning the outer tube are aligned with each other, and the at least one positioning piece is fitfully embedded in each pair of aligned openings. 15. The MBR flat membrane module aeration device according to claim 14, characterized in that, the materials of the positioning frame, the central pipe, the connecting pipe and the positioning sheet are the same engineering plastics. 16. The MBR flat membrane module aeration equipment as claimed in claim 14, characterized in that the positioning frame, the central pipe, the connecting pipe and the positioning piece are all made of ABS or UPVC.

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