CN216171445U

CN216171445U - System for cleaning in-situ suspended MBR (membrane bioreactor) membrane

Info

Publication number: CN216171445U
Application number: CN202122467295.1U
Authority: CN
Inventors: 张忠波; 李志平; 张崇能; 张正阳; 乔自平; 吴敬平; 何敏
Original assignee: Yunnan Water Investment Co ltd; Yunnan Chengtou Bishuiyuan Membrane Technology Co ltd
Current assignee: Yunnan Water Investment Co ltd; Yunnan Chengtou Bishuiyuan Membrane Technology Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-04-05
Anticipated expiration: 2031-10-13

Abstract

The utility model belongs to the technical field of sewage treatment, and provides an in-situ suspended MBR membrane cleaning system, so that an MBR membrane can be cleaned in situ, the effect is better than that of the traditional off-line cleaning, and the dosage of a medicament is saved; the technical scheme is as follows: the good oxygen pond of mud backward flow pump's export is passed through mud backward flow intercommunication, be equipped with high-pressure squirt in the MBR membrane cisterna, the clean water pond is connected with high-pressure squirt through high-pressure water pipe and is connected with clean water pump on the high-pressure water pipe, the mouth of pipe of intaking of backwash pump passes through clean water pipeline intercommunication clean water pond, backwash pump mouth of intaking is linked together through backwash pipeline and membrane group ware export, install the dosing pump in dosing system's the export, the dosing pump is linked together through dosing pipeline and backwash pipeline, install the backwash solenoid valve on the backwash pipeline, the aeration that sets up on gas outlet through air supply pipeline and the membrane group ware of trembling the membrane fan blows the gas pipe entry and is linked together, PLC control system connects valve and pump on all pipelines and realizes control to it.

Description

System for cleaning in-situ suspended MBR (membrane bioreactor) membrane

Technical Field

The utility model discloses a system for cleaning an in-situ suspended MBR (membrane bioreactor) membrane, belongs to the technical field of sewage treatment, and particularly relates to in-situ cleaning of an MBR membrane.

Background

MBR technique is because its effluent water quality is good, uses advantages such as few, and more sewage treatment now adopts this technique. However, in the operation process, the cleaning of the membrane is always a difficult problem in the operation process of the membrane technology, the traditional on-line cleaning cannot meet the cleaning requirement, and the recovery of the membrane flux is poor. Off-line cleaning requires the consumption of large amounts of chemicals, resulting in waste of chemicals. The membrane detaching and cleaning is troublesome, the time and labor cost are high, membrane threads can be damaged, and irreversible damage can be caused. This presents problems to the operation and deployment of MBR technology. Therefore, the problem to be solved in the operation of the membrane technology is to find a simple, quick, drug-saving and effective membrane cleaning method.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art, and solves the technical problems that: the system for cleaning the in-situ suspended MBR membrane is provided, so that the MBR membrane can be cleaned in situ, the cleaning effect is better and the dosage of a medicament is saved compared with the traditional offline cleaning effect.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a system for abluent MBR membrane of unsettled in situ which characterized in that: the device comprises an aerobic tank, an MBR membrane tank, an equipment room and a clean water tank, wherein the MBR membrane tank is provided with a membrane group device and a sludge reflux pump, and the equipment room is internally provided with a backwashing pump, a dosing system, a dosing pump, a backwashing electromagnetic valve, a clean water pump, a membrane shaking fan and a PLC control system;

the good oxygen pond of mud backward flow pump's export is passed through mud backward flow intercommunication, be equipped with high-pressure squirt in the MBR membrane cisterna, the clean water pond is connected with high-pressure squirt through high-pressure water pipe and is connected with clean water pump on the high-pressure water pipe, the mouth of pipe of intaking of backwash pump passes through clean water pipeline intercommunication clean water pond, backwash pump mouth of intaking is linked together through backwash pipeline and membrane group ware export, install the dosing pump in dosing system's the export, the dosing pump is linked together through dosing pipeline and backwash pipeline, install the backwash solenoid valve on the backwash pipeline, the gas outlet of trembling the membrane fan is linked together through the aeration purge pipe entry that sets up on air supply pipeline and the membrane group ware, PLC control system connects valve and pump on all pipelines and realizes control to it.

A plurality of dosing systems are installed in the equipment room, and each dosing system is communicated with the backwashing pipeline through a dosing pump and a dosing pipeline.

The medicine adding system is filled with liquid sodium hypochlorite or citric acid.

And a water inlet flashboard is arranged on the water inlet of the MBR membrane tank.

And a microporous aerator is arranged in the aerobic tank.

And the membrane in the MBR membrane tank is a hollow fiber membrane.

The backwashing pump is a self-priming pump.

Compared with the prior art, the utility model has the beneficial effects that: the in-situ suspended cleaning of the MBR membrane is realized, membrane detaching cleaning is avoided, the membrane cleaning speed is accelerated to a great extent, and the membrane cleaning cost is reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings;

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; 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.

As shown in fig. 1, the system for cleaning an in-situ suspended MBR membrane of the present invention is characterized in that: the device comprises an aerobic tank 1, an MBR membrane tank 2, an equipment room 3 and a clean water tank 4, wherein the MBR membrane tank 2 is provided with a membrane group device 5 and a sludge reflux pump 13, and a backwashing pump 6, a dosing system 9, a dosing pump 10, a backwashing electromagnetic valve 12, a clean water pump 16, a membrane shaking fan 17 and a PLC control system 20 are arranged in the equipment room 3;

the export of mud backwash pump 13 passes through mud back flow pipe 14 intercommunication good oxygen pond 1, be equipped with the high-pressure squirt in the MBR membrane cisterna 2, clean water basin 4 is connected with the high-pressure squirt through high-pressure water pipe 15 and is connected with clean water pump 16 on the high-pressure water pipe 15, the mouth of pipe of intaking of backwash pump 6 passes through clean water pipeline 7 intercommunication clean water basin 4, the mouth of pipe of intaking of backwash pump 6 is linked together through backwash pipeline 8 and membrane group ware 5 export, install dosing pump 10 in the export of dosing system 9, dosing pump 10 is linked together with backwash pipeline 8 through dosing pipeline 11, install backwash solenoid valve 12 on the backwash pipeline 8, the gas outlet of trembling membrane fan 17 is linked together through the aeration purge pipe entry that air supply pipeline 18 and the setting on membrane group ware 5, PLC control system 20 connects valve and pump on all pipelines and realizes controlling it.

A plurality of dosing systems 9 are installed in the equipment room 3, and each dosing system 9 is communicated with the backwashing pipeline 8 through a dosing pump 10 and a dosing pipeline 11.

Liquid sodium hypochlorite or citric acid is filled in the dosing system 9.

And a water inlet flashboard is arranged on the water inlet of the MBR membrane tank 2.

A microporous aerator 19 is arranged in the aerobic tank 1.

The membrane in the MBR membrane tank 2 is a hollow fiber membrane.

The backwashing pump 6 is a self-priming pump.

The using method comprises the following steps:

firstly, closing a water inlet flashboard of an MBR membrane tank 2, pumping activated sludge of the MBR membrane tank 2 to an aerobic tank 1 through a sludge reflux pump 13 in the MBR membrane tank 2, temporarily storing microorganisms in the aerobic tank 1 to ensure the microbial biomass of a sewage treatment system after membrane cleaning is finished, evacuating the MBR membrane tank 2 to ensure that a membrane is completely exposed in the air and is suspended on a membrane group device 5;

secondly, a clean water pump 16 is started, clean water is supplied to a high-pressure water gun in the MBR membrane pool 2 through a high-pressure water pipe 15, and the membrane group device 5 and membrane filaments are washed in situ by the high-pressure water gun so as to remove large attached mud blocks on the surfaces of the membrane group device and the membrane filaments;

thirdly, injecting the medicament in the medicament adding system 9 from the inner cavity of the membrane wire through the backwashing pump 6 and the medicament adding pump 10, gradually seeping from inside to outside, softening mud blocks attached to the membrane wire and segregating pollutants in membrane pores, thus avoiding the problem of poor effect caused by dilution of the medicament by water in a membrane pool in the traditional online medicament washing, standing for a period of time after the medicament completely permeates the whole membrane, and fully softening and segregating the pollutants attached to the mud blocks and in the membrane cavity;

fourthly, the clean water pump 16 is started again, and the membrane module 5 and the membrane wires are washed in situ again by using the high-pressure water gun so as to remove mud blocks attached to the surfaces of the membrane wires after the membrane wires are softened;

fifthly, injecting water into the MBR membrane tank 2, starting a membrane shaking fan 17 to shake the membrane with large air flow, and realizing that the membrane silk attached mud blocks fall off and the membrane silk is self-cleaned, wherein the membrane shaking time is 10 minutes.

In the third step, sodium hypochlorite solution or citric acid solution with the concentration of 5000mg/L in the dosing system 9 is pumped into the membrane wires of the membrane group device 5 through the backwashing pump 6 and the dosing pump 10, the dosing time is 5 minutes, the purpose is to enable the medicament injected into the membrane wires to be fully leached from the inner cavities of the membrane wires, soften mud blocks attached to the membrane wires and soften pollutants in pores of the membrane wires, then the membrane wires in the membrane group device 5 are stood for 10 minutes, the medicament is enabled to fully permeate the whole membrane, the mud blocks attached to the membrane wires and the pollutants in the pores are fully softened, the medicament is injected for 2 minutes to supplement the liquid medicament, and then the membrane wires in the membrane group device 5 are stood for 10 minutes.

According to the utility model, the membrane in the MBR process sewage treatment plant can be cleaned in situ in the membrane tank through the operation, the membrane cleaning drug consumption and the cleaning labor cost of the sewage treatment plant are reduced, and meanwhile, the investment and construction cost of the sewage treatment plant is reduced, so that the method has the advantages of flexibility, simplicity, high efficiency and stability.

In the utility model, a plurality of MBR membrane tanks 2 can share the same system, and a plurality of membrane group devices 5 can also be arranged in the MBR membrane tanks 2 to work together.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a system for abluent MBR membrane of unsettled in situ which characterized in that: the device comprises an aerobic tank (1), an MBR membrane tank (2), an equipment room (3) and a clean water tank (4), wherein the MBR membrane tank (2) is provided with a membrane group device (5) and a sludge reflux pump (13), and the equipment room (3) is internally provided with a backwashing pump (6), a dosing system (9), a dosing pump (10), a backwashing electromagnetic valve (12), a clean water pump (16), a membrane shaking fan (17) and a PLC control system (20);

the outlet of the sludge reflux pump (13) is communicated with the aerobic tank (1) through a sludge reflux pipe (14), a high-pressure water gun is arranged in the MBR membrane tank (2), the clean water tank (4) is connected with the high-pressure water gun through a high-pressure water pipe (15) and is connected with a clean water pump (16) on the high-pressure water pipe (15), the water inlet pipe orifice of the backwash pump (6) is communicated with the clean water tank (4) through a clean water pipe (7), the water outlet pipe orifice of the backwash pump (6) is communicated with the outlet of the membrane unit (5) through a backwash pipeline (8), a dosing pump (10) is installed on the outlet of the dosing system (9), the dosing pump (10) is communicated with the backwash pipeline (8) through a dosing pipeline (11), a backwash electromagnetic valve (12) is installed on the backwash pipeline (8), the air outlet of the membrane shaking fan (17) is communicated with the inlet of an aeration and scavenging air pipe arranged on the membrane unit (5) through an air supply pipeline (18), and the PLC control system (20) is connected with and controls valves and pumps on all pipelines.

2. The system of claim 1, wherein the MBR membrane cleaning system comprises: a plurality of dosing systems (9) are installed in the equipment room (3), and each dosing system (9) is communicated with the backwashing pipeline (8) through a dosing pump (10) and a dosing pipeline (11).

3. The system of claim 2, wherein the MBR membrane cleaning system comprises: liquid sodium hypochlorite or citric acid is filled in the dosing system (9).

4. The system of any one of claims 1-3, wherein the MBR membrane cleaning system comprises: and a water inlet flashboard is arranged on the water inlet of the MBR membrane tank.

5. The system of any one of claims 1-3, wherein the MBR membrane cleaning system comprises: a microporous aerator (19) is arranged in the aerobic tank (1).

6. The system of any one of claims 1-3, wherein the MBR membrane cleaning system comprises: the membrane in the MBR membrane tank (2) is a hollow fiber membrane.

7. The system of any one of claims 1-3, wherein the MBR membrane cleaning system comprises: the backwashing pump (6) is a self-priming pump.