MBR membrane module with self-cleaning anti-blocking cover

Abstract

The utility model belongs to the field of MBR membrane manufacturing, specifically relates to a kind of MBR membrane assembly with self-cleaning anti-blocking cover.The component includes MBR membrane assembly, and MBR membrane assembly is externally provided with self-cleaning anti-blocking cover, and self-cleaning anti-blocking cover is quadrangular frustum, and the top of self-cleaning anti-blocking cover is open space.The utility model can reduce the speed of membrane pollution, prolong the service life and scrubbing cycle of membrane, and reduce system energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of MBR membrane manufacturing, specifically relating to an MBR membrane module with a self-cleaning anti-clogging cover. Background Technology

[0002] Membrane bioreactor (MBR) technology, with its superior solid-liquid separation performance and stable effluent quality, has become a core technology in wastewater treatment and reuse. However, MBR systems face severe challenges in actual operation. Fibrous materials (50-200 μm in diameter), hair (0.5-5 mm in length), and microplastics (0.1-1 mm in particle size) in the influent can easily penetrate pretreatment materials, including but not limited to coarse and fine screens, and then anchor themselves in the gaps between hollow fiber membrane filaments or flat sheet membranes, forming irreversible cake-like blockages. This causes the transmembrane pressure differential (TMP) to rise rapidly at a rate of 0.2-0.5 kPa / d, and membrane flux decline to as high as 30-50% / year, necessitating frequent offline cleaning and even replacement of membrane modules at extremely high costs! To address the aforementioned issues, the industry currently commonly adds a 1-3mm pore size membrane grid after the fine grid in membrane bioreactor (MBR) processes. However, some drawbacks remain, such as high investment costs, increased footprint, high operating energy consumption, actual interception efficiency of only 85-90%, and approximately 30% of escaped debris directly causing blockage between hollow fiber membrane filaments or flat sheet membranes. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an MBR membrane module with a self-cleaning anti-clogging cover, which can improve the service life of the MBR membrane module.

[0004] The technical solution adopted in this utility model is as follows: An MBR membrane module with a self-cleaning anti-clogging cover includes an MBR membrane module. The MBR membrane module is provided with a self-cleaning anti-clogging cover on its exterior. The self-cleaning anti-clogging cover includes a base plate and four side plates. The base plate and the four side plates form a truncated quadrangular shape. The top of the self-cleaning anti-clogging cover is an open space. The base plate and the four side plates are provided with holes.

[0005] The self-cleaning anti-clogging cover can be integrated with the side baffle of the MBR membrane module itself, or it can be installed separately.

[0006] The size of the self-cleaning anti-clogging cover is large enough to completely cover the MBR membrane module.

[0007] The holes on the base plate and the four side plates have a diameter of 0.3-1.0 mm and a porosity of 60-80%.

[0008] The holes on the base plate are vertically arranged, and the holes on the four side plates are arranged inward and downward at an angle.

[0009] The self-cleaning anti-clogging cover can be made of materials such as PET, PP, or 304 stainless steel.

[0010] The aperture size of the holes on the self-cleaning anti-clogging cover is not greater than the effective aperture (pore size) of the membrane grid.

[0011] In operation, the mixed liquid enters the self-cleaning protective cover through the holes in the cover. Small particles, flocculent debris, and other impurities are intercepted outside the cover. Clean water passes through the MBR membrane, is collected by the collection pipe, and discharged from the system, thus achieving the output water from the MBR membrane module. The mixed liquid is concentrated inside the self-cleaning protective cover. When cleaning is required, compressed air for membrane scrubbing drives the concentrated mixed liquid upward in a turbulent flow from the bottom. This flow returns to the membrane tank outside the self-cleaning protective cover through the open space at the top, forming a vertical three-dimensional circulation. During this circulation, the rising turbulence and the mixed liquid sweep the self-cleaning protective cover, preventing it from becoming clogged.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are: This invention features a self-cleaning anti-clogging cover on the outside of the MBR membrane module. When the mixed liquid passes through the self-cleaning anti-clogging cover, it can intercept impurities such as fibrous materials (50-200μm in diameter), hair (0.5-5mm in length), and microplastics (0.1-1mm in particle size) in the influent outside the self-cleaning anti-clogging cover, increasing the impurity interception rate to 99.5% or higher.

[0013] This invention features a vertical opening on the base plate and a downward-sloping opening on the side plate that leads into the protective cover. This allows the rising aeration turbulence during membrane scrubbing to pass smoothly through the openings of the self-cleaning anti-clogging cover, achieving automatic flushing of the cover and effectively reducing clogging. The backwashing cycle of the hollow fiber membrane can be extended to 24-72 hours.

[0014] Because the self-cleaning anti-clogging cover can block most impurities, the rate of MBR membrane fouling can be reduced by more than 70%, the membrane service life can be extended from 3-5 years to 6-10 years, the membrane cleaning cycle can be extended, and the system energy consumption can be reduced by 5-10%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an MBR membrane module with a self-cleaning anti-clogging cover; Figure 2 A front view of an MBR membrane module with a self-cleaning anti-clogging cover; Figure 3 Left view of an MBR membrane module with a self-cleaning anti-clogging cover; Figure 4A top view of an MBR membrane module with a self-cleaning anti-clogging cover; Figure 5 This is a schematic diagram of the opening on the right side plate of the self-cleaning anti-clogging cover 2. Detailed Implementation

[0016] The specific implementation of this utility model will be described below with reference to the embodiments. However, the following embodiments are only used to illustrate this utility model in detail and do not limit the scope of this invention in any way.

[0017] Example 1: An MBR membrane module with a self-cleaning anti-clogging cover, such as Figure 1-4 As shown, it includes an MBR membrane module 1, and a self-cleaning anti-clogging cover 2 is provided on the outside of the MBR membrane module. The size of the self-cleaning anti-clogging cover 2 is large enough to completely cover the MBR membrane module 1. The self-cleaning anti-clogging cover 2 includes a base plate and four side plates. The shape formed by the base plate and the four side plates is a truncated quadrangular shape. The top of the self-cleaning anti-clogging cover is an open space. The base plate and the four side plates are provided with holes.

[0018] The holes on the base plate and four side plates have a diameter of 0.3-1.0 mm and a porosity of 60-80%. The holes on the base plate are vertically oriented, while the holes on the four side plates are oriented inwards towards the protective cover and downwards. The opening diagram of the right side plate is shown below. Figure 5 As shown.

[0019] In operation, the mixed liquid enters between the self-cleaning protective cover 2 and the MBR membrane module 1 through the holes of the self-cleaning anti-clogging cover 2. Small particles, flocculent debris, and other impurities are intercepted outside the self-cleaning protective cover 2. Clean water passes through the MBR membrane, is collected by the water collection pipe, and is discharged outside the system, thus achieving the operation of the MBR membrane module 1 and the output water. The mixed liquid is concentrated inside the self-cleaning protective cover 2. When cleaning is required, the compressed air for membrane scrubbing drives the concentrated mixed liquid upward in a turbulent flow from the bottom. It then returns to the membrane tank outside the self-cleaning protective cover 2 through the open space at the top, forming a vertical three-dimensional circulation. During this circulation, the rising turbulence and the mixed liquid passing through the holes in the bottom plate and side plate sweep the self-cleaning protective cover 2, preventing it from becoming clogged.

[0020] Unlike Example 1, during the production of the MBR membrane module, the four side panels are directly perforated to form the four side panels of the self-cleaning anti-clogging cover 2. At the same time, a porous plate is added to the bottom of the MBR membrane module as a base plate to form an MBR membrane module with built-in filtration function.

[0021] The holes on the bottom plate of this self-cleaning anti-clogging cover 2 are vertically arranged, while the holes on the four side plates are angled downwards and facing inwards towards the cover. This allows the compressed air used for membrane cleaning to carry the concentrated mixture upwards through the holes, facilitating the rinsing of the self-cleaning anti-clogging cover 2. The reasonable setting of the hole diameter and porosity on the bottom and side plates maximizes the interception of impurities.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. An MBR membrane module with a self-cleaning anti-clogging cover, comprising an MBR membrane module, characterized in that: The MBR membrane module is equipped with a self-cleaning anti-clogging cover. The self-cleaning anti-clogging cover includes a base plate and four side plates. The base plate and the four side plates form a truncated quadrangular shape. The top of the self-cleaning anti-clogging cover is an open space. The base plate and the four side plates are provided with holes, which are arranged inward and downward at an angle to the inside of the protective cover.

2. The MBR membrane module with a self-cleaning anti-clogging cover according to claim 1, characterized in that: The holes on the base plate and the four side plates have a diameter of 0.3-1.0 mm and a porosity of 60-80%.

3. The MBR membrane module with a self-cleaning anti-clogging cover according to claim 2, characterized in that: The holes on the base plate are vertically arranged.

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