CN216987110U

CN216987110U - MBR membrane frame, MBR membrane module and sewage treatment plant

Info

Publication number: CN216987110U
Application number: CN202220007819.0U
Authority: CN
Inventors: 黄春湘; 张万文; 韦文东; 孙帮周; 吴丽香; 覃颀; 向银华
Original assignee: GREEN ENVIRONMENTAL Tech Co Ltd
Current assignee: GREEN ENVIRONMENTAL Tech Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-07-19
Anticipated expiration: 2032-01-05

Abstract

The utility model provides an MBR membrane frame, an MBR membrane assembly comprising the MBR membrane frame and membrane elements and a sewage treatment device comprising the MBR membrane frame, relating to the field of sewage treatment, wherein the MBR membrane frame comprises a hexahedral frame body and a limiting device, the limiting device comprises a first limiting part, a second limiting part and a first limiting groove, the first limiting part is detachably and fixedly connected at the upper end of the frame body, at least one second limiting part is detachably and fixedly connected at two sides of the frame body in the Y direction, the first limiting groove is arranged on two side beams in the X direction at the lower end of the membrane frame body, the second limiting groove is arranged on each second limiting part, the frame body supports the membrane elements, the first limiting part is abutted against the upper ends of the membrane elements to limit the upward movement of the membrane elements, the second limiting parts at two sides of the frame body are respectively abutted against two sides of the membrane elements in the Y direction, each membrane element can partially extend into the at least two first limiting grooves at two sides and the at least two second limiting grooves at two sides, the first limiting groove and the second limiting groove can limit the membrane element to move along the X direction. The maintenance difficulty is low.

Description

MBR membrane frame, MBR membrane module and sewage treatment plant

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an MBR (membrane bioreactor) membrane frame and a sewage treatment device.

Background

MBR (membrane bioreactor) is a new type of high efficiency water treatment equipment which combines a membrane separation unit with a biological treatment unit. The MBR process mainly utilizes a membrane separation technology to intercept active strains and macromolecular organic substances in sewage, can effectively realize solid-liquid separation, greatly improves the effluent quality, and can reduce the volume of a reactor. MBR is mainly applied to sewage treatment fields such as municipal administration, industrial park, scenic spot and reuse of reclaimed water field, and wherein the membrane element plays solid-liquid separation and improves core effect such as activated sludge concentration. The MBR membrane module mainly comprises a membrane frame, a water collecting pipe, an aeration system, membrane elements and the like, wherein the aeration system is mainly used for cleaning the membrane elements or supplying oxygen for biological reaction and plays an important role in the MBR system. MBR membrane elements inevitably cause blockage after running for a period of time, so that the membrane flux is reduced, the water yield is reduced, maintenance, cleaning and recovery are required to be carried out regularly, and when the membrane element flux is reduced to a certain degree or the recovery and cleaning cannot recover the pressure difference between membranes, the membrane elements need to be lifted out of a membrane pool for immersion cleaning.

The conventional MBR membrane module is usually assembled into a whole by a plurality of membrane elements and then installed in a membrane frame, the whole weight is heavier, the membrane module cannot be taken out from a membrane pool and cleaned by manpower, and the conventional membrane frame is usually provided with a dismounting opening only at one side of the top or the side. Due to the limitation of the membrane frame structure, membrane elements of the existing large-scale MBR water treatment plant are generally cleaned after the membrane elements are integrally taken out by adopting hoisting equipment. However, the whole sewage treatment device of the small-sized or integrated sewage treatment equipment occupies a small area, a hoisting system cannot be additionally arranged, and the membrane module is difficult to take out of the membrane pool.

Another common membrane element cleaning method is chemical cleaning, which does not need to take out a membrane element, but easily corrodes a membrane frame, specifically, an MBR system mainly blocks organic matters, and usually acid cleaning is performed on NaOCl liquid medicine; the membrane frame is also blocked by inorganic matters, so that acidic liquid medicines can be selected for acid cleaning, the commonly used liquid medicines comprise NaClO, oxalic acid, citric acid and the like, the metal water collecting pipe is very easy to be contacted with the agent to generate electrochemical corrosion in the membrane cleaning process, and the components in the sewage are complex, so that the corrosion speed of the membrane frame is accelerated, and the service life of the membrane frame is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an MBR membrane frame, an MBR membrane module and a sewage treatment device, which are used for solving the problems in the prior art, are convenient to install and disassemble and greatly reduce the maintenance difficulty.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides an MBR membrane frame, which comprises a frame body and a limiting device, wherein the frame body is a hexahedral frame, two directions vertical to the height direction of the frame body are respectively in an X direction and a Y direction, the limiting device comprises a first limiting part, a second limiting part and a first limiting groove, the upper end of the frame body is detachably and fixedly connected with at least one first limiting part, two sides of the frame body in the Y direction are detachably and fixedly connected with at least one second limiting part, two side beams at the lower end of the membrane frame body parallel to the X direction are respectively provided with a plurality of first limiting grooves, each second limiting part is provided with a plurality of second limiting grooves, membrane elements are placed and supported in the frame body, each first limiting part is used for abutting against the upper end of each membrane element and limiting the upward movement of each membrane element, the second limiting parts on two sides of the frame body are respectively used for being abutted against two sides of each film element along the Y direction and limiting the movement of each film element along the Y direction, each film element can partially extend into at least two first limiting grooves on two sides of the frame body and at least two second limiting grooves on two sides of the frame body, and the first limiting grooves and the second limiting grooves are used for limiting the movement of each film element along the X direction.

Preferably, the MBR membrane frame provided by the present invention further includes third limiting members, at least one of the third limiting members is detachably and fixedly connected to both sides of the Y direction of the frame body, the third limiting members on both sides of the frame body are respectively used for abutting against both sides of each membrane element along the Y direction and limiting the movement of each membrane element along the Y direction, each of the third limiting members is disposed at the lower end of the frame body, and each of the second limiting members is disposed at the upper end of the frame body.

Preferably, the two side beams at the lower end of the membrane frame body parallel to the X direction are a first side beam and a second side beam respectively, the upper portions of the first side beam and the second side beam are fixedly connected with a plurality of first limiting rods, the central line direction of each first limiting rod is parallel to the height direction of the frame body, a gap is reserved between every two adjacent first limiting rods to form a first limiting groove, each second limiting component comprises a second limiting rod and a plurality of third limiting rods, one side, close to the membrane element, of each second limiting rod is fixedly connected with a plurality of third limiting rods, two ends of each second limiting rod are detachably and fixedly connected with the membrane frame body, the central line direction of each third limiting rod is parallel to the Y direction, and a gap is reserved between every two adjacent third limiting rods to form a second limiting groove.

The utility model also provides an MBR membrane module, which comprises a plurality of membrane elements and the MBR membrane frame, wherein the membrane elements are arranged in the frame body, the frame body can provide upward support for the membrane elements, the upper end of each membrane element can be abutted against the first limiting part, two sides of each membrane element in the Y direction can be respectively abutted against the second limiting parts on two sides of the frame body, and each membrane element can simultaneously extend into at least two first limiting grooves on two sides of the frame body and at least two second limiting grooves on two sides of the frame body.

Preferably, the MBR membrane module provided by the utility model further comprises a water collecting device, wherein the water collecting device comprises a plurality of water collecting pipes and a plurality of water passing pipes, the water collecting pipes are detachably and fixedly connected with the frame body, one end of each water passing pipe is communicated with the water collecting pipe, the other end of each water passing pipe is communicated with the water outlet of each membrane element, and the water collecting pipes are provided with water outlets.

Preferably, the MBR membrane module further comprises an aeration device, wherein the aeration device comprises a plurality of air inlet pipes and a plurality of aeration pipes, each aeration pipe and each air inlet pipe are arranged on the frame body, each aeration pipe is arranged on the outer side of each membrane element, the air inlet pipes are fixedly connected to one side of the frame body in the X direction, and each aeration pipe is communicated with the air inlet pipe.

Preferably, the aeration device further comprises a forward washing pipe and a backward washing pipe, the forward washing pipe and the backward washing pipe are communicated with the outlet of the aeration pipe, and the air inlet pipe, the forward washing pipe and the backward washing pipe are respectively provided with a switch valve.

Preferably, the aeration pipe comprises two main aeration pipes and a plurality of branch aeration pipes, the two main aeration pipes are respectively fixedly connected to the two sides of the frame body in the X direction, each branch aeration pipe is fixedly connected with the frame body and arranged at the lower end of each membrane element, two ends of one main aeration pipe are respectively communicated with the air inlet pipe and one end of each branch aeration pipe, one end of the other main aeration pipe is communicated with the other end of each branch aeration pipe, the other end of the other main aeration pipe is communicated with the forward washing pipe and the backwash pipe, and each branch aeration pipe is provided with a plurality of aeration holes with downward openings.

Preferably, the lower end of the frame body has two side beam pipes, the length direction of each side beam pipe is parallel to the Y direction, each side beam pipe is provided with a plurality of first holes, the plurality of first holes on the two side beam pipes are oppositely arranged, each aeration branch pipe is communicated with each side beam pipe through each first hole, each side beam pipe is provided with a second hole, each second hole is communicated with each aeration main pipe, a plurality of layers of sealing parts are arranged between each water passing pipe and the water outlet of each membrane element, the water collecting device further comprises a plurality of water collecting joints, one end of each water collecting joint is communicated with the water passing pipe, the other end of each water collecting joint is communicated with each water collecting pipe, one end, close to each water collecting pipe, of each water collecting joint is provided with a limiting part, and each limiting part can limit the length of each water collecting joint extending into the water collecting pipe.

The utility model also provides a sewage treatment device which is provided with the MBR membrane frame.

Compared with the prior art, the utility model achieves the following technical effects:

according to the MBR membrane frame, the MBR membrane assembly and the sewage treatment device provided by the utility model, each membrane element can be limited only by the first limiting part, the second limiting part, the first limiting groove and the second limiting groove, the membrane elements do not need to be fixedly connected with the frame body, so that each membrane element can be conveniently and independently disassembled, namely each membrane element can enter and exit the frame body through the upper end opening of the frame body after the first limiting part is disassembled, each membrane element can enter and exit the frame body through any one of the two Y-direction openings of the frame body after the second limiting part is disassembled, meanwhile, the convenience requirements of early assembly and disassembly and assembly of the membrane elements in water are met, and the MBR membrane frame, the MBR membrane assembly and the sewage treatment device are convenient to apply and maintain. Meanwhile, each membrane element can be independently positioned and installed, and compared with a mode of integrally installing a plurality of membrane elements, the single membrane element is light in weight, so that the membrane elements can be conveniently taken out and installed when being cleaned, and the maintenance difficulty is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of an MBR membrane frame in example 1;

FIG. 2 is a schematic structural view of an MBR membrane module in example 2;

FIG. 3 is a top view of the MBR membrane module in example 2;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic configuration view of a water collecting apparatus according to embodiment 2;

FIG. 7 is an enlarged view of C in FIG. 6;

FIG. 8 is a schematic view of the structure of an aeration apparatus in example 2;

FIG. 9 is an enlarged view of D in FIG. 8;

in the figure: 100-MBR membrane frame, 200-MBR membrane module, 1-frame body, 101-first side beam, 102-second side beam, 103-side beam pipe, 104-first hole, 2-limiting device, 201-first limiting part, 202-second limiting part, 203-first limiting groove, 204-second limiting groove, 205-third limiting part, 206-first limiting rod, 207-second limiting rod, 208-third limiting rod, 3-3, 4-water collecting device, 401-water collecting pipe, 402-water passing pipe, 403-water collecting joint, 5-aeration device, 501-air inlet pipe, 502-aeration pipe, 503-forward washing pipe, 504-reverse washing pipe, 505-switch valve, 506-main aeration pipe, 507-branch aeration pipe, 6-sealing part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example 1

As shown in fig. 1, the present embodiment provides an MBR membrane rack 100, which includes a frame body 1 and a limiting device 2, where the frame body 1 is a hexahedral frame, preferably, the frame body 1 is composed of four vertical columns and four side beams, specifically, each vertical column is vertically disposed, two side beams are disposed between two adjacent vertical columns, and the two side beams are disposed at the upper and lower ends of the vertical columns respectively. Two directions perpendicular to the height direction of the frame body 1 are respectively the X direction and the Y direction, the limiting device 2 comprises a first limiting part 201, a second limiting part 202 and a first limiting groove 203, the upper end of the frame body 1 is detachably and fixedly connected with at least one first limiting part 201, preferably, the number of the first limiting parts 201 is 2, the first limiting parts 201 are parallel to the X direction, and the first limiting parts 201 are fixedly connected to the two side beams. At least one second limiting part 202 is detachably and fixedly connected to two sides of the frame body 1 in the Y direction, preferably, one second limiting part 202 is respectively arranged on two sides of the frame body 1 in the Y direction, two ends of each second limiting part 202 are respectively and fixedly connected to one side of each two upright posts far away from the membrane elements 3, the center line of each second limiting part 202 is parallel to the X direction, a plurality of first limiting grooves 203 are respectively arranged on two side beams of the lower end of the membrane frame body parallel to the X direction, a plurality of second limiting grooves 204 are respectively arranged on each second limiting part 202, the frame body 1 is used for placing and supporting the membrane elements 3, preferably, the lower end of each membrane element 3 is arranged on two side beams parallel to the X direction, the membrane elements 3 are preferably rectangular ring-shaped, each first limiting part 201 is used for abutting against the upper end of each membrane element 3 and limiting the upward movement of each membrane element 3, the second limiting parts 202 on both sides of the frame body 1 are respectively used for being abutted against both sides of each membrane element 3 along the Y direction and limiting the movement of each membrane element 3 along the Y direction, each membrane element 3 can be partially inserted into at least two first limiting grooves 203 on both sides of the frame body 1 and at least two second limiting grooves 204 on both sides of the frame body 1, and the first limiting grooves 203 and the second limiting grooves 204 are used for limiting the movement of each membrane element 3 along the X direction, preferably, the first limiting grooves 203 on the two sides of the frame body 1 are arranged in a one-to-one correspondence manner, the first limiting grooves 203 and the second limiting grooves 204 on the same side of the frame body 1 are arranged in a one-to-one correspondence manner, each membrane element 3 can simultaneously extend into each first limiting groove 203 on the two sides of the frame body 1 and each second limiting groove 204 on the two sides of the frame body 1, and the four limiting grooves act together to realize the limiting of one membrane element 3 in four directions. Every membrane element 3 all can only carry on spacingly through first spacing part 201, second spacing part 202, first spacing groove 203 and second spacing groove 204, membrane element 3 need not with frame body 1 fixed connection, make every membrane element 3 can conveniently dismantle alone, promptly every membrane element 3 all can get in and out frame body 1 by the upper end opening of frame body 1 after demolising first spacing part 201, every membrane element 3 all can get in and out frame body 1 by arbitrary one opening of the Y of frame body 1 to both sides after demolising second spacing part 202, satisfied the convenience demand of membrane element 3 assembly in earlier stage and dismouting in aqueous simultaneously, be convenient for use and maintenance. Meanwhile, each membrane element 3 can be independently positioned and installed, and compared with a mode of integrally installing a plurality of membrane elements 3, a single membrane element 3 is light in weight, so that the membrane elements 3 can be conveniently taken out and installed when being cleaned, and the maintenance difficulty is reduced.

The MBR membrane rack 100 provided in this embodiment further includes third limiting members 205, at least one third limiting member 205 is detachably and fixedly connected to both sides of the Y direction of the frame body 1, preferably, one third limiting member 205 is respectively disposed on both sides of the Y direction of the frame body 1, the third limiting members 205 on both sides of the frame body 1 are respectively used for abutting against both sides of the Y direction of each membrane element 3 and limiting the movement of each membrane element 3 along the Y direction, each third limiting member 205 is disposed at the lower end of the frame body 1, and each second limiting member 202 is disposed at the upper end of the frame body 1. The effect of limiting each membrane element 3 is enhanced, thereby enhancing the stability of installation of each membrane element 3.

Two side beams at the lower end of the membrane frame body parallel to the X direction are respectively a first side beam 101 and a second side beam 102, a plurality of first limiting rods 206 are fixedly connected above the first side beam 101 and the second side beam 102, the central line direction of each first limiting rod 206 is parallel to the height direction of the frame body 1, a gap is reserved between every two adjacent first limiting rods 206 to form a first limiting groove 203, each second limiting component 202 comprises a second limiting rod 207 and a plurality of third limiting rods 208, one side of each second limiting rod 207 close to the membrane element 3 is fixedly connected with a plurality of third limiting rods 208, two ends of each second limiting rod 207 are detachably and fixedly connected with the membrane frame body, preferably, two ends of each second limiting rod 207 are respectively arranged on two upright posts of the frame body 1, the central line direction of each third limiting rod 208 is parallel to the Y direction, a gap is reserved between every two adjacent third limiting rods 208 to form a second limiting groove 204. Preferably, the first limiting rods 206 on both sides of the frame body 1 are symmetrically distributed about the symmetrical plane of the frame body 1X direction, and the third limiting rods 208 on both sides of the frame body 1 are symmetrically distributed about the symmetrical plane of the frame body 1X direction.

Example 2

As shown in fig. 2 to 9, the present embodiment provides an MBR membrane module 200 including a plurality of membrane elements 3 and the MBR membrane frame 100 of embodiment 1, wherein each membrane element 3 is disposed in the frame body 1, the frame body 1 can provide upward support for each membrane element 3, the upper end of each membrane element 3 can be abutted against a first limiting member 201, both sides in the Y direction of each membrane element 3 can be abutted against second limiting members 202 on both sides of the frame body 1, and each membrane element 3 can be inserted into at least two first limiting grooves 203 on both sides of the frame body 1 and at least two second limiting grooves 204 on both sides of the frame body 1 at the same time.

The MBR membrane module 200 provided by this embodiment further includes a water collecting device 4, and the water collecting device 4 is preferably made of ABS material, which is beneficial to reducing the overall weight of the device, improving the corrosion resistance and acid resistance of the device, and making the maintenance and operation of the MBR membrane module 200 safer and more convenient. The water collecting device 4 includes a plurality of water collecting pipes 401 and water passing pipes 402, the water passing pipes 402 are detachably and fixedly connected to the frame body 1, one end of each water passing pipe 402 is communicated with the water collecting pipe 401, the other end of each water passing pipe 402 is communicated with the water outlet of each membrane element 3, and the water collecting pipes 401 are provided with water outlets. Preferably, the water collecting device 4 is arranged outside the upper end of the frame body 1, and can be conveniently detached.

The MBR membrane module 200 provided by the embodiment further comprises an aeration device 5, wherein the aeration device 5 comprises a plurality of air inlet pipes 501 and a plurality of aeration pipes 502, each aeration pipe 502 and each air inlet pipe 501 are arranged on the frame body 1, each aeration pipe 502 is arranged on the outer side of each membrane element 3, and each air inlet pipe 501 is fixedly connected to one side of the frame body 1 in the X direction to avoid the disassembly of the barrier membrane elements 3. Each aeration pipe 502 is communicated with an air inlet pipe 501. The aeration device 5 can increase the oxygen content in water, and is beneficial to improving the sewage treatment efficiency and effect.

The aeration device 5 further comprises a forward washing pipe 503 and a reverse washing pipe 504, the forward washing pipe 503 and the reverse washing pipe 504 are both communicated with the outlet of the aeration pipe 502, and the air inlet pipe 501, the forward washing pipe 503 and the reverse washing pipe 504 are all provided with a switch valve 505. When the device normally operates, the switch valve 505 on the air inlet pipe 501 is opened, and the switch valves 505 on the forward washing pipe 503 and the backwashing pipe 504 are closed; the positive washing of the aeration pipe 502 is carried out in a gas washing mode, specifically, a switch valve 505 on the air inlet pipe 501 and a switch valve 505 on the positive washing pipe 503 are opened, and a switch valve 505 on the backwashing pipe 504 is closed; when the aeration pipe 502 is backwashed, a water washing mode is adopted, specifically, an on-off valve 505 on the backwash pipe 504 is opened, and an on-off valve 505 on the air inlet pipe 501 and an on-off valve 505 on the forward washing pipe 503 are closed. Preferably, through time control switch control, regularly inject gas or water into aeration equipment 5, carry out the forward washing or the backwash to aeration equipment 5, prevent aeration branch 507 and block up, need not manual cleaning, the maintenance of being convenient for, and improved maintenance efficiency.

The aeration pipe 502 includes two main aeration pipes 506 and a plurality of branch aeration pipes 507, the two main aeration pipes 506 are fixedly connected to both sides of the frame body 1 in the X direction, and each branch aeration pipe 507 is fixedly connected to the frame body 1 and provided at the lower end of each membrane element 3. Detachment of the barrier film member 3 is avoided. Preferably, each aeration main pipe 506 and each aeration branch pipe 507 are detachably and fixedly connected to the frame body 1. Two ends of one main aeration pipe 506 are respectively communicated with the air inlet pipe 501 and one end of each branch aeration pipe 507, one end of the other main aeration pipe 506 is communicated with the other end of each branch aeration pipe 507, the other end of the other main aeration pipe 506 is communicated with both the forward washing pipe 503 and the backwashing pipe 504, and each branch aeration pipe 507 is provided with a plurality of aeration holes with downward openings. The opening of the aeration hole is arranged downwards, so that the blockage of the aeration hole can be effectively reduced.

The lower end of the frame body 1 is provided with two side beam pipes 103, the length direction of each side beam pipe 103 is parallel to the Y direction, each side beam pipe 103 is provided with a plurality of first holes 104, the plurality of first holes 104 on the two side beam pipes 103 are oppositely arranged, each branch aerator pipe 507 is communicated with each side beam pipe 103 through each first hole 104, specifically, both ends of each branch aerator pipe 507 are respectively communicated with the two first holes 104 on the two side beam pipes 103, and preferably, the branch aerator pipe 507 is communicated with the side beam pipes 103 through an aeration joint. Each side beam pipe 103 is provided with a second hole, and each second hole is communicated with each aeration main pipe 506. And a plurality of layers of sealing parts 6 are arranged between each water passing pipe 402 and the water outlet of each membrane element 3, and the sealing parts 6 are preferably sealing rings, so that the sealing effect is improved. The water collecting device 4 further comprises a plurality of water collecting joints 403, one end of each water collecting joint 403 is communicated with the water pipe 402, the other end of each water collecting joint 403 is communicated with each water collecting pipe 401, preferably, each water collecting joint 403 is communicated with the water collecting pipe 401 through a hole in the side wall of the water collecting pipe 401, one end of each water collecting joint 403, which is close to the water collecting pipe 401, is provided with a limiting part, and each limiting part can limit the length of each water collecting joint 403 extending into the water collecting pipe 401, so that the phenomenon that the flowing of water is influenced by the too long length of the water collecting joint 403 extending into the water collecting pipe 401 is avoided. Preferably, the frame further comprises at least two supporting parts, each water passing pipe 402 is U-shaped, each water passing pipe 402 is arranged outside the frame body 1, each supporting part is detachably and fixedly connected with the frame body 1, preferably, two ends of each supporting part are in threaded connection with two upright posts of the frame body 1 through long bolts, and one side of each water passing pipe 402 along the Y direction can be abutted against at least one supporting part, so that the water passing pipe 402 is supported, and the mounting stability is improved.

Example 3

This embodiment provides a sewage treatment apparatus provided with the MBR membrane holder 100 of embodiment 1.

The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.

Claims

1. An MBR membrane frame, its characterized in that: the membrane frame comprises a frame body and a limiting device, wherein the frame body is a hexahedral frame, two directions perpendicular to the height direction of the frame body are respectively an X direction and a Y direction, the limiting device comprises a first limiting part, a second limiting part and a first limiting groove, the upper end of the frame body is detachably and fixedly connected with at least one first limiting part, two sides of the frame body in the Y direction are detachably and fixedly connected with at least one second limiting part, two side beams at the lower end of the membrane frame body parallel to the X direction are respectively provided with a plurality of first limiting grooves, each second limiting part is provided with a plurality of second limiting grooves, membrane elements are placed and supported in the frame body, and each first limiting part is used for being abutted against the upper end of each membrane element and limiting the upward movement of each membrane element, the second limiting parts on two sides of the frame body are respectively used for being abutted against two sides of each film element along the Y direction and limiting the movement of each film element along the Y direction, each film element can partially extend into at least two first limiting grooves on two sides of the frame body and at least two second limiting grooves on two sides of the frame body, and the first limiting grooves and the second limiting grooves are used for limiting the movement of each film element along the X direction.

2. The MBR membrane frame of claim 1, wherein: the frame body is fixedly connected with at least one third limiting part in a detachable mode on two sides in the Y direction, the third limiting parts on two sides of the frame body are respectively used for being abutted against two sides of each film element along the Y direction and limiting the movement of each film element along the Y direction, each third limiting part is arranged at the lower end of the frame body, and each second limiting part is arranged at the upper end of the frame body.

3. The MBR membrane frame of claim 1, wherein: the two side beams at the lower end of the membrane frame body parallel to the X direction are a first side beam and a second side beam respectively, the upper portions of the first side beam and the second side beam are fixedly connected with a plurality of first limiting rods, the central line direction of each first limiting rod is parallel to the height direction of the frame body, a gap is reserved between every two adjacent first limiting rods to form a first limiting groove, each second limiting component comprises a second limiting rod and a plurality of third limiting rods, one side, close to the membrane element, of each second limiting rod is fixedly connected with a plurality of third limiting rods, two ends of each second limiting rod are detachably and fixedly connected with the membrane frame body, the central line direction of each third limiting rod is parallel to the Y direction, and a gap is reserved between every two adjacent third limiting rods to form a second limiting groove.

4. An MBR membrane module, which is characterized in that: the MBR membrane frame comprises a plurality of membrane elements and the MBR membrane frame of any one of claims 1-2, wherein each membrane element is arranged in the frame body, the frame body can provide upward support for each membrane element, the upper end of each membrane element can be abutted against the first limiting part, two sides of each membrane element in the Y direction can be respectively abutted against the second limiting parts on two sides of the frame body, and each membrane element can simultaneously extend into at least two first limiting grooves on two sides of the frame body and at least two second limiting grooves on two sides of the frame body.

5. The MBR membrane module of claim 4, wherein: the water collecting device comprises a plurality of water collecting pipes and a plurality of water passing pipes, the water collecting pipes are detachably and fixedly connected with the frame body, one end of each water passing pipe is communicated with the water collecting pipes, the other end of each water passing pipe is communicated with the water outlets of the membrane elements, and the water collecting pipes are provided with water outlets.

6. The MBR membrane module of claim 5, wherein: the membrane element aeration device is characterized by further comprising an aeration device, wherein the aeration device comprises a plurality of air inlet pipes and a plurality of aeration pipes, the aeration pipes and the air inlet pipes are arranged on the frame body, the aeration pipes are arranged on the outer sides of the membrane elements, the air inlet pipes are fixedly connected to the X-direction side of the frame body, and the aeration pipes are communicated with the air inlet pipes.

7. The MBR membrane module of claim 6, wherein: the aeration device further comprises a forward washing pipe and a reverse washing pipe, the forward washing pipe and the reverse washing pipe are communicated with an outlet of the aeration pipe, and the air inlet pipe, the forward washing pipe and the reverse washing pipe are respectively provided with a switch valve.

8. The MBR membrane module of claim 7, wherein: the aeration pipe includes aeration main pipe and aeration branch pipe, aeration main pipe is two, aeration branch pipe is a plurality of, two aeration main pipe respectively fixed connection in the frame body X to both sides, each aeration branch pipe with frame body fixed connection just sets up in each the lower extreme of membrane element, one aeration main pipe's both ends respectively with the intake pipe with each aeration branch pipe's one end intercommunication, another aeration main pipe's one end and each aeration branch pipe's the other end intercommunication, and another aeration main pipe's the other end with the forward washing pipe with the backwash pipe all communicates, is equipped with a plurality of opening aeration holes down on each aeration branch pipe.

9. The MBR membrane module of claim 8, wherein: the lower end of the frame body is provided with two side beam pipes, the length direction of each side beam pipe is parallel to the Y direction, each side beam pipe is provided with a plurality of first holes, the plurality of first holes on the two side beam pipes are oppositely arranged, each aeration branch pipe is communicated with each side beam pipe through each first hole, each side beam pipe is provided with a second hole, each second hole is communicated with each aeration main pipe, and a plurality of layers of sealing parts are arranged between each water passing pipe and the water outlet of each membrane element, the water collecting device further comprises a plurality of water collecting joints, one end of each water collecting joint is communicated with the water passing pipe, the other end of each water collecting joint is communicated with each water collecting pipe, one end, close to each water collecting pipe, of each water collecting joint is provided with a limiting part, and each limiting part can limit the length of each water collecting joint extending into the water collecting pipe.

10. A sewage treatment device is characterized in that: the MBR membrane frame of claim 1 is provided.