CN213738759U

CN213738759U - Improved MBR system

Info

Publication number: CN213738759U
Application number: CN202022080586.0U
Authority: CN
Inventors: 于玉彬; 王旭平; 刘苏
Original assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Current assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-07-20
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a MBR system of improvement, include the MBR reactor, be connected to the MBR reactor produce water system, connect produce water system with the backwash system of MBR reactor, be connected to the membrane cleaning system of MBR reactor reaches right the aeration systems of MBR reactor aeration, backwash system is connected to aeration systems's tuber pipe (38), membrane cleaning system is connected to tuber pipe (38). The utility model provides a MBR system of improvement can avoid the aeration hole of aeration pipe to block up, alleviates the dirty stifled problem of membrane, guarantees the steady operation of system.

Description

Improved MBR system

Technical Field

The utility model belongs to the technical field of sewage treatment, in particular to MBR system of improvement.

Background

The MBR water treatment process is widely applied to municipal sewage and industrial wastewater treatment, urban black and odorous water treatment, rural sewage treatment and the like at present, but membrane pollution is one of the difficult problems of the process technology, and the common mode for solving the membrane pollution in engineering is to flush and remove sludge deposited on the surface of a membrane by utilizing the circulation and shearing force action of water through aeration. The high-strength aeration scouring is continuously carried out on the surface of the membrane, membrane filaments are disturbed, a large amount of microorganisms are prevented from being attached to the membrane in the processes of pumping and running, the membrane fouling and blocking are reduced, and the long-time normal use of the membrane is kept. Aeration scouring at the bottom of the membrane is considered as an effective way for controlling membrane pollution in engineering, aeration effectively scours and shears the surface of the membrane to prevent pollutants from attaching to the surface of the membrane, and also plays a role in supplying oxygen to microorganisms in an MBR membrane tank, so that dissolved oxygen in the MBR membrane tank is kept at 2-4 mg/L, and the microorganisms in the membrane tank have normal activity.

A large number of problems exist in the bottom aeration mode of the MBR membrane module in engineering application, air is sent to the bottom air pipe through the air blower and the air pipe, and aeration is realized by utilizing aeration holes arranged on the air pipe. The aeration system usually needs to continuously operate without stopping work, and due to the existence of negative pressure, after the fan stops working, hot air can be held in the air pipe for a long time, sludge around an aeration hole can be heated and dried, the orifice is blocked, and further the phenomena of unsmooth aeration or uneven bubbles and the like are caused. In the MBR system, the membrane scrubbing aeration generally adopts a large-bubble perforated aeration mode, and the aeration is usually stopped when the system is at rest, so that aeration holes are easy to block. In the practical engineering application of the membrane bioreactor, the common perforation aeration mode often causes unsmooth aeration due to orifice blockage, thereby causing membrane fouling and blockage and finally influencing the operating environment of the whole process system.

Disclosure of Invention

The utility model aims at providing a MBR system of improvement solves the peripheral sludge drying of aeration hole and blocks up the problem in drill way.

Based on the above problem, the utility model provides a technical scheme is:

an improved MBR system, comprising an MBR reactor, a water production system connected to the MBR reactor, a backwash system connected to the water production system and the MBR reactor, a membrane cleaning system connected to the MBR reactor, and an aeration system for aerating the MBR reactor, wherein the backwash system is connected to an air pipe of the aeration system, and the membrane cleaning system is connected to the air pipe.

In some embodiments, the backwashing system comprises a backwashing main pipe, one end of the backwashing main pipe is connected to the water production system, the other end of the backwashing main pipe is connected with a first backwashing branch pipe and a second backwashing branch pipe, the first backwashing branch pipe is communicated to the MBR, the second backwashing branch pipe is communicated to the air pipe, a first backwashing electric valve is arranged on the first backwashing branch pipe, and a second backwashing electric valve is arranged on the second backwashing branch pipe.

In some embodiments, the membrane cleaning system comprises an acid washing system and an alkaline washing system, the alkaline washing system and the acid washing system are both connected to the pipe section of the first backwashing branch pipe located at the upstream of the first backwashing electric valve, the acid washing system is connected to the pipe section of the second backwashing branch pipe located at the downstream of the second backwashing electric valve through a cleaning branch pipe, and a cleaning electric valve is arranged on the cleaning branch pipe.

In some embodiments, the acid washing system comprises an acid dosing tank, a first washing main pipe connecting the acid dosing tank and the first backwashing branch pipe, and a first washing manual valve, a first washing metering pump, a first washing pressure gauge and a second washing manual valve which are sequentially arranged on the first washing main pipe along the water flow direction, wherein the first washing main pipe is connected to the washing branch pipe;

the alkali washing system comprises an alkali dosing tank, a second washing main pipe, a third washing dynamic valve, a second washing metering pump, a second washing pressure gauge and a fourth washing dynamic valve, wherein the second washing main pipe is connected with the alkali dosing tank and the first backwashing branch pipe, and the third washing dynamic valve, the second washing metering pump, the second washing pressure gauge and the fourth washing dynamic valve are sequentially arranged on the second washing main pipe along the water flow direction.

In some embodiments, the backwash system further comprises a first backwash manual valve, a backwash pump, a backwash check valve, a second backwash manual valve, a backwash pressure meter and a backwash flow meter which are sequentially arranged on the backwash main pipe along the water flow direction.

In some embodiments, the water production system includes a water production tank, a water production pipe connecting the water production tank and the MBR reactor, and a water production pressure gauge, a water production electric valve, a first water production manual valve, a water production pump, a water production check valve, a second water production manual valve, and a water production flow meter, which are sequentially arranged on the water production pipe along a water flow direction, and the first backwash branch pipe is connected to a pipe section of the water production pipe located at an upstream of the water production pressure gauge.

In some embodiments, the aeration system further comprises an aeration blower, and an aeration check valve, an aeration manual valve, an aeration flow meter and an aeration electric valve which are sequentially arranged on the air pipe along the air flow direction, the air pipe connects the aeration blower and an aeration pipe at the lower part of the MBR reactor, and the second backwash branch pipe is connected to a pipe section of the air pipe located at the downstream of the aeration electric valve.

Compared with the prior art, the utility model has the advantages that:

1. the backwashing system is connected to an air pipe of the aeration system, and the aeration pipe is washed by membrane produced water, so that the problems that sludge around the aeration hole is heated and dried and the hole opening is blocked are solved;

2. the membrane cleaning system is connected to the air pipe, and the aeration pipe is periodically washed by cleaning agents, so that the problem that the aeration pipe and an aeration hole are blocked due to accumulation of solid sludge difficult to dissolve in water in the aeration pipe is solved;

3. the aeration pipes are periodically washed, so that the problem that membrane thread is polluted and blocked due to unsmooth aeration or uneven bubbles formed by blockage of the aeration pipes is solved, and the MBR system can be ensured to operate for a long time;

4. the aeration pipe is washed by the water production and membrane cleaning system of the MBR system, so that extra cleaning cost and manual cleaning cost can be saved, and the wastewater treatment cost is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an improved MBR system of the present invention;

wherein:

1. an MBR membrane tank; 2. a membrane box; 3. a water production pipe; 4. a water production pressure gauge; 5. a water production electric valve; 6. a first water-producing manual valve; 7. a water production pump; 8. a water production check valve; 9. a second water-producing manual valve; 10. a produced water flow meter; 11. a water production tank; 12. backwashing the main pipe; 13. a first backwash manual valve; 14. a backwash pump; 15. backwashing the check valve; 16. a second backwashing manual valve; 17. backwashing the pressure gauge; 18. backwashing the flow meter; 19. a first backwash leg; 20. a first backwash electric valve; 21. a second backwash leg; 22. a second backwash electric valve; 23. an acid dosing tank; 24. a first cleaning main pipe; 25. cleaning the branch pipe; 26. a first cleaning manual valve; 27. a first cleaning metering pump; 28. a first cleaning pressure gauge; 29. a second cleaning manual valve; 30. cleaning the electric valve; 31. an alkali dosing tank; 32. a second cleaning main pipe; 33. a third clean hand valve; 34. a second cleaning metering pump; 35. a second cleaning pressure gauge; 36. a fourth clean hand valve; 37. aeration fan 38, wind pipe; 39. an aeration check valve; 40. an aeration manual valve; 41. an aeration flow meter; 42. an aeration electric valve; 43. an aeration pipe.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1, for the utility model discloses a structure schematic diagram provides a MBR system of improvement, including the MBR reactor, be connected to the product water system of MBR reactor, be connected to the backwash system of producing water system and MBR reactor, be connected to the membrane cleaning system of MBR reactor, and to the aeration system of MBR reactor aeration, in order to wash away aeration pipe 43 in the MBR reactor, with the backwash system, the membrane cleaning system is connected to aeration system's tuber pipe 38 respectively, can wash away aeration pipe 43, solve the problem of aeration hole jam.

The MBR reactor comprises an MBR membrane tank 1 and a membrane box 2 arranged in the MBR membrane tank 1, and an aeration pipe 43 is arranged below the membrane box 2.

The water production system comprises a water production tank 11, a water production pipe 3 for connecting the water production tank 11 with the membrane tank 2, and a water production pressure gauge 4, a water production electric valve 5, a first water production manual valve 6, a water production pump 7, a water production check valve 8, a second water production manual valve 9 and a water production flow meter 10 which are sequentially arranged on the water production pipe 3 along the water flow direction.

The backwash system comprises a backwash main pipe 12, and a first backwash manual valve 13 sequentially arranged on the backwash main pipe 12 along the water flow direction, a backwash pump 14, a backwash check valve 15, a second backwash manual valve 16, a backwash pressure gauge 17 and a backwash flowmeter 18, wherein the backwash main pipe 12 one end is connected to a product water tank 11, the backwash main pipe 12 other end is connected with a first backwash branch pipe 19 and a second backwash branch pipe 21, wherein the first backwash branch pipe 19 is connected to a product water pipe 3, the second backwash branch pipe 21 is connected to an air pipe 38, the first backwash branch pipe 19 is provided with a first backwash electric valve 20, the second backwash electric valve 21 is provided with a second backwash electric valve 22, the aeration pipe 43 can be periodically washed through the second backwash branch pipe 21, and the problem that sludge around an aeration hole blocks the orifice due to heat drying is avoided.

The membrane cleaning system comprises an acid cleaning system and an alkali cleaning system, wherein the acid cleaning system comprises an acid dosing tank 23, a first cleaning main pipe 24 for connecting the acid dosing tank 23 and a first backwashing branch pipe 19, and a first cleaning manual valve 26, a first cleaning metering pump 27, a first cleaning pressure gauge 28 and a second cleaning manual valve 29 which are sequentially arranged on the first cleaning main pipe 24 along the water flow direction, the first cleaning main pipe 24 is connected to a pipe section of the second backwashing branch pipe 21 located at the downstream of a second backwashing electric valve 22 through a cleaning branch pipe 25, and a cleaning electric valve 30 is arranged on the cleaning branch pipe 25.

The alkali washing system comprises an alkali dosing tank 31, a second washing main pipe 32 connecting the alkali dosing tank 31 and the first backwashing branch pipe 19, and a third washing manual valve 33, a second washing metering pump 34, a second washing pressure gauge 35 and a fourth washing manual valve 36 which are sequentially arranged on the second washing main pipe 32 along the water flow direction, wherein in the embodiment, NaClO/NaOH is added into the alkali dosing tank 31, the first washing main pipe 24 and the second washing main pipe 32 are connected to a pipe section on the first backwashing branch pipe 19, which is positioned at the upstream of the first backwashing electric valve 20, and membrane wires in the membrane tank can be periodically and chemically washed.

The aeration system comprises an aeration fan 37, an aeration check valve 39, an aeration manual valve 40, an aeration flow meter 41 and an aeration electric valve 42 which are sequentially arranged on an air pipe 38 along the air flow direction, the air pipe 38 is connected with the aeration fan 37 and an aeration pipe 43, and the second backwashing branch pipe 21 is connected to a pipe section of the air pipe 38 positioned at the downstream of the aeration electric valve 42.

The above examples are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable one skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An improved MBR system, comprising an MBR reactor, a water production system connected to the MBR reactor, a backwash system connecting the water production system to the MBR reactor, a membrane cleaning system connected to the MBR reactor, and an aeration system for aerating the MBR reactor, wherein: the backwashing system is connected to an air pipe (38) of the aeration system, and the membrane cleaning system is connected to the air pipe (38).

2. The improved MBR system of claim 1, wherein: the backwashing system comprises a backwashing main pipe (12), one end of the backwashing main pipe (12) is connected to the water production system, the other end of the backwashing main pipe (12) is connected with a first backwashing branch pipe (19) and a second backwashing branch pipe (21), the first backwashing branch pipe (19) is communicated to the MBR, the second backwashing branch pipe (21) is communicated to the air pipe (38), a first backwashing electric valve (20) is arranged on the first backwashing branch pipe (19), and a second backwashing electric valve (22) is arranged on the second backwashing branch pipe (21).

3. The improved MBR system of claim 2, wherein: the membrane cleaning system comprises an acid cleaning system and an alkali cleaning system, wherein the alkali cleaning system and the acid cleaning system are connected to a pipe section of the first backwashing branch pipe (19) located at the upstream of the first backwashing electric valve (20), the acid cleaning system is connected to a pipe section of the second backwashing branch pipe (21) located at the downstream of the second backwashing electric valve (22) through a cleaning branch pipe (25), and a cleaning electric valve (30) is arranged on the cleaning branch pipe (25).

4. The improved MBR system of claim 3, wherein: the acid washing system comprises an acid dosing tank (23), a first cleaning main pipe (24) connecting the acid dosing tank (23) and the first backwashing branch pipe (19), and a first cleaning manual valve (26), a first cleaning metering pump (27), a first cleaning pressure gauge (28) and a second cleaning manual valve (29) which are sequentially arranged on the first cleaning main pipe (24) along the water flow direction, wherein the first cleaning main pipe (24) is connected to the cleaning branch pipe (25);

the alkali washing system comprises an alkali dosing box (31), a second washing main pipe (32) for connecting the alkali dosing box (31) and the first backwashing branch pipe (19), and a third washing dynamic valve (33), a second washing metering pump (34), a second washing pressure gauge (35) and a fourth washing dynamic valve (36) which are sequentially arranged on the second washing main pipe (32) along the water flow direction.

5. The improved MBR system of claim 2, wherein: the backwashing system also comprises a first backwashing manual valve (13), a backwashing pump (14), a backwashing check valve (15), a second backwashing manual valve (16), a backwashing pressure gauge (17) and a backwashing flow meter (18) which are sequentially arranged on the backwashing main pipe (12) along the water flow direction.

6. The improved MBR system of claim 2, wherein: the water production system comprises a water production tank (11), a water production pipe (3) for connecting the water production tank (11) and the MBR, and a water production pressure gauge (4), a water production electric valve (5), a first water production manual valve (6), a water production pump (7), a water production check valve (8), a second water production manual valve (9) and a water production flow meter (10) which are sequentially arranged on the water production pipe (3) along the water flow direction, wherein the first backwashing branch pipe (19) is connected to a pipe section of the water production pipe (3) located at the upstream of the water production pressure gauge (4).

7. The improved MBR system of claim 2, wherein: the aeration system further comprises an aeration fan (37), and an aeration check valve (39), an aeration manual valve (40), an aeration flow meter (41) and an aeration electric valve (42) which are sequentially arranged on the air pipe (38) along the air flow direction, wherein the air pipe (38) is connected with the aeration fan (37) and an aeration pipe (43) at the lower part of the MBR, and the second backwashing branch pipe (21) is connected to a pipe section of the air pipe (38) which is positioned at the downstream of the aeration electric valve (42).