CN218688187U

CN218688187U - Online backwash device of MBR membrane

Info

Publication number: CN218688187U
Application number: CN202222923185.6U
Authority: CN
Inventors: 王飞; 随斌斌; 牛文刚; 王娟
Original assignee: Shaanxi Jinchuangbo Environmental Engineering Technology Co ltd
Current assignee: Shaanxi Jinchuangbo Environmental Engineering Technology Co ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-03-24
Anticipated expiration: 2032-11-03

Abstract

The utility model provides an MBR membrane online backwashing device, which comprises an MBR tank, wherein a pipeline of an aerator extends into the MBR tank to aerate sewage, an MBR membrane is arranged in the MBR tank to carry out biological treatment, and fluid treated by the MBR tank flows into a pulse circulating water tank through the pipeline; a first branch and a second branch are further arranged on a pipeline between the MBR tank and the pulse circulating water tank, a first electric valve and a backwashing pump are sequentially arranged on the first branch to respectively realize the on/off of the first branch and the suction of fluid in the pulse circulating water tank, and a water production pump and a second electric valve are sequentially arranged on the second branch to respectively realize the on/off of the suction of the fluid in the MBR tank and the on/off of the second branch; and a third electric valve is arranged on the third branch to realize the opening/closing of the third branch. According to the utility model discloses an online backwash device of MBR membrane carries out the blowback simultaneously in the backwash to increase the mechanical friction on MBR membrane surface, solve the jam problem on MBR membrane surface more effectively.

Description

Online backwash device of MBR membrane

Technical Field

The utility model relates to a sewage treatment device technical field, concretely relates to online backwash device of MBR membrane.

Background

At present, in the field of sewage treatment and water resource recycling, MBR (Membrane bioreactor) is a novel water treatment technology combining a Membrane separation unit and a biological treatment unit. According to the structure of the membrane, the membrane can be divided into a flat membrane, a tubular membrane, a hollow fiber membrane and the like, and the traditional MBR membrane easily causes the defects of easy scaling, blockage, too fast water yield attenuation, short service life and the like on the surface of the membrane in the use process and under higher sludge concentration. Therefore the utility model provides an online backwash device of MBR membrane to improve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the MBR membrane among the prior art and leading to the easy defect of scale deposit of membrane surface easily, therefore provides an online backwash device of MBR membrane.

In order to solve the problem, the utility model provides an online backwash device of MBR membrane, include:

the sewage treatment device comprises an MBR tank, an aerator and a pulse circulating water tank, wherein a pipeline of the aerator extends into the MBR tank to aerate sewage, an MBR membrane is arranged in the MBR tank to carry out biological treatment, and fluid treated by the MBR tank flows into the pulse circulating water tank through the pipeline;

a first branch and a second branch are further arranged on a pipeline between the MBR tank and the pulse circulating water tank, the first branch and the second branch are arranged in parallel, a first electric valve and a backwashing pump are sequentially arranged on the first branch to respectively realize the on/off of the first branch and the suction of the fluid in the pulse circulating water tank, and a water production pump and a second electric valve are sequentially arranged on the second branch to respectively realize the on/off of the suction of the fluid in the MBR tank and the on/off of the second branch;

a third branch is further arranged between a pipeline from the aerator to the MBR tank and a pipeline from the MBR tank to the pulse circulating water tank, and a third electric valve is arranged on the third branch to realize the on/off of the third branch.

Preferably, the water production system further comprises a controller, wherein the controller is electrically connected with the aerator, the first electric valve, the backwashing pump, the water production pump, the second electric valve and the third electric valve respectively so as to control the corresponding on/off states respectively.

Preferably, a plurality of branches are further arranged after the pipeline of the aerator extends into the MBR tank, and a plurality of aeration openings are respectively arranged on the branches.

Preferably, a first stop valve is further arranged on a pipeline between the aerator and the MBR tank, and the first stop valve is used for realizing the on/off of the pipeline between the aerator and the MBR tank.

Preferably, a membrane support is arranged in the MBR tank, the membrane support is connected with the bottom of the MBR tank, at least one group of membrane supports is arranged, and a plurality of MBR membranes are arranged on the membrane supports.

Preferably, a pipeline between the MBR tank and the pulse circulating water tank extends into the MBR membrane and is connected with the membrane bracket.

Preferably, the states of the first electric valve opening, the backwashing pump opening, the water production pump closing and the second electric valve closing are linked;

the states of the first electric valve closing, the backwashing pump closing, the water production pump opening and the second electric valve opening are linked.

Preferably, still be provided with the elevator pump in the pulse circulating water pond, circulating water pond upper portion still is provided with the delivery port, the elevator pump with tube coupling between the delivery port.

The utility model provides a pair of online backwash device of MBR membrane has following beneficial effect:

the utility model discloses a fluid after the MBR pond is handled flows in the pulse circulation pond through the pipeline, first branch road and the parallelly connected setting of second branch road, set gradually first motorised valve and backwash pump on the first branch road, in normal processing, first motorised valve is closed, the backwash pump is closed, produce the water pump and open and the second motorised valve is opened, the water of handling in the MBR pond passes through the pipeline and enters into the pulse circulation pond in, first motorised valve is closed in the backwash, the backwash pump is closed, produce the water pump and open and the second motorised valve is opened, send into the MBR pond with the water in the pulse circulation pond this moment, carry out the backwash to the MBR membrane in MBR pond 1, with the surperficial jam of effectual reduction MBR membrane, still set up the third branch road between the pipeline of MBR pond to the pipeline in MBR pond and the pipeline of pulse circulation pond again through the aeration machine, set up the opening/closing of third motorised valve in order to realize the third branch road on the third branch road, through third motorised valve control process, carry out the blowback in the backwash simultaneously, in order to increase the mechanical friction on the MBR membrane surface, solve the jam problem of MBR membrane surface more effectively.

Drawings

FIG. 1 is a schematic view of the process flow of the present invention;

FIG. 2 is a schematic view of the aeration shunt according to the present invention;

fig. 3 is a schematic view of the membrane support structure of the present invention.

The reference numerals are represented as:

1. an MBR tank; 2. a pulse circulation water tank; 3. an aerator; 4. a membrane scaffold; 5. a lift pump; 6. a first shut-off valve; 7. a third electrically operated valve; 8. a first electrically operated valve; 9. a water production pump; 10. a second electrically operated valve; 11. a backwash pump; 12. a first branch; 13. a second branch circuit; 14. a third branch; 15. a water outlet; 16. shunting; 17. an air exposure port.

Detailed Description

As shown in fig. 1-3, the utility model provides an online backwash device of MBR membrane, it includes:

the sewage treatment device comprises an MBR tank 1, an aerator 3 and a pulse circulating water tank 2, wherein a pipeline of the aerator 3 extends into the MBR tank 1 to aerate sewage, an MBR membrane is arranged in the MBR tank 1 to carry out biological treatment, and fluid treated by the MBR tank 1 flows into the pulse circulating water tank 2 through the pipeline;

a first branch 12 and a second branch 13 are further arranged on a pipeline between the MBR tank 1 and the pulse circulating water tank 2, the first branch 12 and the second branch 13 are arranged in parallel, a first electric valve 8 and a backwashing pump 11 are sequentially arranged on the first branch 12 to respectively realize the on/off of the first branch 12 and the suction of the fluid in the pulse circulating water tank 2, and a water production pump 9 and a second electric valve 10 are sequentially arranged on the second branch 13 to respectively realize the on/off of the suction of the fluid in the MBR tank 1 and the on/off of the second branch 13;

a third branch 14 is further arranged between the pipeline from the aerator 3 to the MBR tank 1 and the pipeline from the MBR tank 1 to the pulse circulating water tank 2, and a third electric valve 7 is arranged on the third branch 14 to realize the on/off of the third branch 14. As shown in fig. 1-3, sewage is treated physically and chemically, and is introduced into an MBR tank 1 after sedimentation treatment, wherein the MBR tank 1 is connected with an aerator 3 through a pipeline, wherein the aerator 3 is a roots blower 50-500, which is commercially available, an MBR membrane is arranged in the MBR tank 1 for biological treatment, the MBR membrane is a hollow fiber membrane, which is commercially available, a conventional biological treatment process is combined with membrane filtration through the MBR membrane to provide a high-level organic matter and suspended matter removal effect, the fluid treated by the MBR tank 1 flows into a pulse circulation tank 2 through a pipeline, a first branch 12 and a second branch 13 are further arranged on the pipeline between the MBR tank 1 and the pulse circulation tank 2 to achieve two-way communication between the MBR tank 1 and the pulse circulation tank, the MBR tank 1 is backwashed by using pulse circulation water, specifically, the first branch 12 and the second branch 13 are arranged in parallel, a first branch 12 and a second branch 11 are sequentially arranged, a first 8 and a jdf-600 door is a jdf-600, a DDF pump 10 is opened in the first branch 12 and a second branch 10-b, a ddq pump 10 is sequentially opened, a DDF-b pump 10 is opened in the pulse circulation tank 2, a DDF tank 10 is opened, a DDF-b-10 is opened to achieve normal suction pump, a normal pump, a ddq pump, a DDF-10 is opened, in backwashing, a first electric valve 8 is closed, a backwashing pump 11 is closed, a water production pump 9 is opened, a second electric valve 10 is opened, at the moment, water in a pulse circulating water tank 2 is sent into an MBR tank 1, MBR membranes in the MBR tank 1 are backwashed, the surface blockage of the MBR membranes is effectively reduced, a third branch 14 is further arranged between a pipeline from an aerator 3 to the MBR tank 1 and a pipeline from the MBR tank 1 to the pulse circulating water tank 2, a third electric valve 7 is arranged on the third branch 14 to realize the opening/closing of the third branch 14, the model of the third electric valve 7 is JD-DDF-600, the backwashing process is controlled through the third electric valve 7, and back flushing is simultaneously carried out during backwashing so as to increase the mechanical friction on the surface of the MBR membranes, and the problem of the surface blockage of the MBR membranes is effectively solved.

In some embodiments, the aerator further comprises a controller electrically connected to the aerator 3, the first electric valve 8, the backwashing pump 11, the water production pump 9, the second electric valve 10 and the third electric valve 7 respectively to control the corresponding on/off states respectively. The MBR membrane online backwashing device further comprises a controller, wherein the controller is respectively electrically connected with the aerator 3, the first electric valve 8, the backwashing pump 11, the water production pump 9, the second electric valve 10 and the third electric valve 7, the controller is Ai Moxun-2 BD23-0XB8, the controller can realize that the first electric valve 8 is closed, the backwashing pump 11 is closed, the water production pump 9 is opened and the second electric valve 10 is opened in normal treatment through respective control of the controller, the treated water in the MBR tank 1 enters the pulse circulation water tank 2 through a pipeline, the first electric valve 8 is closed, the backwashing pump 11 is closed, the water production pump 9 is opened and the second electric valve 10 is opened in backwashing, at the moment, the water in the pulse circulation water tank 2 is sent into the MBR tank 1, intermittent reciprocating work is formed by setting the opening time, for example, the sewage is treated in normal work for 7 minutes, and then 3 minutes of backwashing is carried out to improve the efficiency of the whole process.

In some embodiments, the pipeline of the aerator 3 extends into the MBR tank 1 and is further provided with a plurality of branches 16, and a plurality of aeration openings 17 are respectively formed in the plurality of branches 16. As shown in fig. 2, still be provided with many branch circuits 16 after aeration machine 3's pipeline stretches into in the MBR pond 1, be equipped with a plurality of aeration openings 17 on many branch circuits 16 respectively, through carrying out aeration treatment to the fluid in the MBR pond 1, the cooperation reaches better effect with biological treatment, and its many branch circuits 16 are shunted, pass through a plurality of aeration openings 17 again for can carry out better aeration to a plurality of positions in the MBR pond 1.

In some embodiments, a first cut-off valve 6 is further disposed on the pipeline between the aerator 3 and the MBR tank 1, and the first cut-off valve 6 is used for opening/closing the pipeline between the aerator 3 and the MBR tank 1. As shown in fig. 1, a first stop valve 6 is further disposed on a pipeline between the aerator 3 and the MBR tank 1, the first stop valve 6 is used to open/close the pipeline between the aerator 3 and the MBR tank 1, and whether to aerate the MBR tank 1 can be selected by the first stop valve 6 during the treatment process.

In some embodiments, a membrane support 4 is disposed in the MBR tank 1, the membrane support 4 is connected to the bottom of the MBR tank 1, at least one set of membrane supports 4 is disposed, and a plurality of MBR membranes are mounted on the membrane support 4. As shown in fig. 1-3, a membrane support 4 is arranged in the MBR tank 1, the membrane support 4 is connected with the bottom of the MBR tank 1, and can be welded or screwed, the membrane support 4 is provided with at least one group, the membrane support 4 is used for fixing the MBR membrane in an effective space, a plurality of MBR membranes are installed on the membrane support 4, and the membrane support 4 is reasonably arranged and the MBR membranes are arranged by combining the specification of the MBR tank 1, so as to achieve a better treatment effect.

In some embodiments, the piping between the MBR tank 1 and the pulse circulation tank 2 extends into the MBR membranes and is connected to the membrane holders 4. As shown in fig. 1-3, the pipe between the MBR tank 1 and the pulse circulating water tank 2 extends into the MBR membrane and is connected to the membrane support 4 to blow back the MBR membrane, so as to increase the mechanical friction on the surface of the MBR membrane and more effectively solve the problem of blockage on the surface of the MBR membrane.

In some embodiments, the states of the first electric valve 8 opening, the backwashing pump 11 opening, the water production pump 9 closing and the second electric valve 10 closing are linked;

the first electric valve 8 is closed, the backwashing pump 11 is closed, the water production pump 9 is opened and the second electric valve 10 is opened. As shown in fig. 1 to 3, in normal treatment, the first electric valve 8 is closed, the backwash pump 11 is closed, the water production pump 9 is opened and the second electric valve 10 is opened, the water treated in the MBR tank 1 enters the pulse circulation water tank 2 through a pipeline, in backwashing, the first electric valve 8 is closed, the backwash pump 11 is closed, the water production pump 9 is opened and the second electric valve 10 is opened, at this time, the water in the pulse circulation water tank 2 is sent into the MBR tank 1, and the MBR membrane in the MBR tank 1 is backwashed, so that the blockage on the surface of the MBR membrane is effectively reduced.

In some embodiments, a lift pump 5 is further arranged in the pulse circulating water tank 2, a water outlet 15 is further arranged at the upper part of the circulating water tank, and the lift pump 5 is connected with the water outlet 15 through a pipeline. As shown in fig. 1, a lift pump 5 is further arranged in the pulse circulating water tank 2, the type of the lift pump 5 is 100WQ50-22-7.5, the lift pump is commercially available, a water outlet 15 is further arranged at the upper part of the circulating water tank, the lift pump 5 is connected with the water outlet 15 through a pipeline, and in the whole process, the outflow of liquid in the pulse circulating water tank 2 is adjusted by combining the water level of the pulse circulating water tank 2 during forward backwashing of an MBR membrane.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An online backwash device of MBR membrane is characterized by comprising:

the sewage treatment device comprises an MBR tank (1), an aerator (3) and a pulse circulating water tank (2), wherein a pipeline of the aerator (3) extends into the MBR tank (1) to aerate sewage, an MBR membrane is arranged in the MBR tank (1) to carry out biological treatment, and fluid treated by the MBR tank (1) flows into the pulse circulating water tank (2) through the pipeline;

a first branch (12) and a second branch (13) are further arranged on a pipeline between the MBR tank (1) and the pulse circulating water tank (2), the first branch (12) and the second branch (13) are arranged in parallel, a first electric valve (8) and a backwashing pump (11) are sequentially arranged on the first branch (12) to respectively realize the on/off of the first branch (12) and the suction of the fluid of the pulse circulating water tank (2), and a water production pump (9) and a second electric valve (10) are sequentially arranged on the second branch (13) to respectively realize the on/off of the suction of the fluid in the MBR tank (1) and the on/off of the second branch (13);

a third branch (14) is further arranged between a pipeline from the aerator (3) to the MBR tank (1) and a pipeline from the MBR tank (1) to the pulse circulating water tank (2), and a third electric valve (7) is arranged on the third branch (14) to realize the on/off of the third branch (14).

2. The MBR membrane online backwashing device of claim 1, wherein:

the device is characterized by further comprising a controller, wherein the controller is electrically connected with the aerator (3), the first electric valve (8), the backwashing pump (11), the water production pump (9), the second electric valve (10) and the third electric valve (7) respectively so as to control the corresponding on/off states respectively.

3. The MBR membrane online backwashing device of claim 1, wherein:

the pipeline of the aerator (3) extends into the MBR tank (1) and is provided with a plurality of branches (16), and the plurality of branches (16) are respectively provided with a plurality of aeration openings (17).

4. The MBR membrane online backwashing device of claim 1, wherein:

a first stop valve (6) is further arranged on a pipeline between the aerator (3) and the MBR tank (1), and the first stop valve (6) is used for realizing the on/off of the pipeline between the aerator (3) and the MBR tank (1).

5. The MBR membrane online backwashing device of claim 1, wherein:

be provided with membrane support (4) in MBR pond (1), membrane support (4) with MBR pond (1) bottom is connected, membrane support (4) are provided with at least a set of, it is a plurality of to install on membrane support (4) the MBR membrane.

6. The MBR membrane online backwashing device of claim 5, wherein:

and a pipeline between the MBR membrane and the pulse circulating water tank (2) extends into the MBR membrane and is connected with the membrane bracket (4).

7. The MBR membrane online backwashing device of claim 1, wherein:

the states of the first electric valve (8) opening, the backwashing pump (11) opening, the water production pump (9) closing and the second electric valve (10) closing are linked;

the states of the first electric valve (8) closing, the backwashing pump (11) closing, the water production pump (9) opening and the second electric valve (10) opening are linked.

8. The MBR membrane online backwashing device of claim 1, wherein:

still be provided with elevator pump (5) in pulse circulating water pond (2), circulating water pond upper portion still is provided with delivery port (15), elevator pump (5) with pipe connection between delivery port (15).