MBR (Membrane Biological Reactor) flat sheet membrane repairing method

Abstract

The invention relates to the technical field of MBR membranes, in particular to an MBR flat membrane repairing method which comprises the following steps: tearing off a filter membrane and flow guide cloth which are used for a long time or are damaged; covering the surface of the guide plate with a new filter membrane and guide cloth; and the filter membrane and the flow guide cloth are welded on the flow guide plate by adopting a convex welding knife. The convex welding knife is used for directly heating and welding to form the groove, so that the filter membrane and the guide plate are welded together, the processes of polishing and welding rib attaching are reduced, the manpower is saved, the working efficiency is improved, and the welding effect is also enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of MBR membranes, and particularly to a method for repairing MBR flat membranes. Background Art

[0002] After the MBR membrane element reaches the end of its service life, its flow guide plate still has utilization value. For the original repair technology, such as a new type of submerged MBR flat separation membrane element, preparation method and repair method disclosed in Chinese Patent Publication No. CN 109794170A, the repair method is as follows: when the membrane element is damaged or the filter membrane fails, remove the filter membranes on both sides of the support plate; polish the welding surfaces of the filter membranes and the support plate smoothly; weld the welding rod to the original welding position of the support plate by thermoplastic means to form a closed welding frame to be welded; then weld the new filter membrane to the support plate as a whole by hot melting or ultrasonic means; after the repair of the submerged MBR flat separation membrane element is completed, it can be reused.

[0003] The above method has cumbersome processes and low efficiency, and if the welding ribs are not straight, uneven in thickness or uneven, it will affect the subsequent welding effect. Summary of the Invention

[0004] The present invention solves the problems in the related technologies, and provides a method for repairing MBR flat membranes. By directly heating and welding with a convex welding knife to form a groove, the filter membrane and the flow guide plate are welded together, reducing the processes of polishing and attaching welding ribs, saving manpower, improving work efficiency, and also strengthening the welding effect.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions: A method for repairing MBR flat membranes, the steps are as follows:

[0006] S1. Tear off the filter membrane and the flow guide cloth that have reached the service life or are damaged;

[0007] S2. Cover the new filter membrane and the flow guide cloth on the surface of the flow guide plate;

[0008] S3. Weld the filter membrane and the flow guide cloth to the flow guide plate by using a convex welding knife.

[0009] As a preferred solution, in step S1, the welding ribs are torn off together.

[0010] As a preferred solution, the convex welding knife includes a knife body, and two columns of symmetrically distributed wavy or continuous right-angled protrusions are formed on the knife body.

[0011] As a preferred solution, in step S3, the filter membrane and the flow guide cloth are welded to the flow guide plate by using high temperature or ultrasonic spot welding.

[0012] As a preferred solution, the flow guide plate is made of ABS material.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By directly heating and welding with a convex welding tool to form a groove, the filter membrane and the flow guide plate are welded together, reducing the processes of grinding and attaching welding ribs, saving labor, improving work efficiency, and enhancing the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention before tearing the film;

[0015] Figure 2 is a schematic structural diagram of the present invention after tearing off the filter membrane and the flow guide cloth;

[0016] Figure 3 is a schematic structural diagram of the present invention after welding a new filter membrane and flow guide cloth;

[0017] Figure 4 is a schematic structural diagram of the convex welding tool.

[0018] In the figure:

[0019] 1. Filter membrane, 2. Flow guide cloth, 3. Welding rib, 4. Convex welding tool, 5. Flow guide plate, 6. Groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0024] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0025] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it cannot be understood as a limitation on the protection scope of the present invention.

[0026] Such as Figures 1 to 4As shown in the figure, a method for repairing an MBR flat membrane is as follows:

[0027] S1. Tear off the filter membrane 1 and the flow guide cloth 2 that have reached the end of their service life or are damaged. At this time, the welding ribs 3 are also torn off together;

[0028] S2. Cover the new filter membrane 1 and the flow guide cloth 2 on the surface of the flow guide plate 5;

[0029] S3. Use a convex surface welding tool 4 to weld the filter membrane 1 and the flow guide cloth 2 to the flow guide plate 5. Since the welding tip has a convex surface structure, it can directly heat and weld to form a groove 6, so that the filter membrane 1 and the flow guide plate 5 are welded together, reducing the processes of grinding and attaching welding ribs, saving manpower, improving work efficiency, and also strengthening the welding effect.

[0030] In one embodiment, the convex surface welding tool 4 includes a tool body, and two columns of symmetrically distributed wavy or continuous right-angled protrusions are formed on the tool body, and corresponding-shaped grooves 6 will be formed during welding.

[0031] In one embodiment, in step S3, the filter membrane 1 and the flow guide cloth 2 are welded to the flow guide plate 5 by means of high-temperature or ultrasonic spot welding.

[0032] In one embodiment, the flow guide plate 5 is made of ABS material.

[0033] The above is a preferred embodiment of the present invention. Those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments, and any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present invention all fall within the protection scope of the present invention.

Claims

1. A method for repairing an MBR flat membrane, characterized in that: The steps are as follows: S1. Tear off the filter membrane (1) and the flow guiding cloth (2) that have reached the service life or are damaged; S2. Cover the new filter membrane (1) and the flow guiding cloth (2) on the surface of the flow guiding plate (5); S3. Use the convex surface welding knife (4) to weld the filter membrane (1) and the flow guiding cloth (2) to the flow guiding plate (5).

2. The MBR flat membrane repair method according to claim 1, characterized in that: In step S1, the welding rib (3) is torn off together.

3. The MBR flat membrane repair method according to claim 1, characterized in that: The convex surface welding knife (4) includes a knife body, and two columns of symmetrically distributed wavy or continuous right-angled protrusions are formed on the knife body.

4. The MBR flat membrane repair method according to claim 1, characterized in that: In step S3, the filter membrane (1) and the flow guiding cloth (2) are welded to the flow guiding plate (5) by means of high-temperature or ultrasonic spot welding.

5. The MBR flat membrane repair method according to claim 1, characterized in that: The flow guiding plate (5) is made of ABS material.

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