CN107381792B

CN107381792B - Double-self-circulation integrated MBR (membrane bioreactor)

Info

Publication number: CN107381792B
Application number: CN201710600323.8A
Authority: CN
Inventors: 赵曙光; 张江英; 管继明; 于海波; 李思思; 张鹏昊; 迟娟
Original assignee: Botian Environment Technology Tianjin Co ltd; Memsino Membrane Technology Beijing Co ltd; Poten Environment Group Co Ltd
Current assignee: Botian Environment Technology Tianjin Co ltd; Memsino Membrane Technology Beijing Co ltd; Poten Environment Group Co Ltd
Priority date: 2017-07-21
Filing date: 2017-07-21
Publication date: 2020-06-19
Anticipated expiration: 2037-07-21
Also published as: CN107381792A

Abstract

The embodiment of the invention provides a double self-circulation integrated MBR (membrane bioreactor), which comprises an MBR reaction tank, wherein the MBR reaction tank is divided into: comprises a filler area, a biochemical area and a membrane area; a gap is reserved between the diversion baffle plate and the bottom end of the MBR reaction tank; a first flow guide clapboard between the membrane area and the biochemical area is also separated from the top end of the MBR reaction tank; a sludge return port is arranged on the second flow guide partition plate between the biochemical region and the filler region; the filler support is arranged in a filler area and at a position which is spaced from the top end of the MBR reaction tank and the bottom end of the MBR reaction tank; the sludge return port is arranged on the second flow guide partition plate and is positioned above the filler bracket; the microporous aeration device is arranged in the biochemical area at the bottom of the MBR reaction tank; the perforating aeration device is arranged in the membrane area at the bottom of the MBR reaction tank; the membrane component is positioned above the perforating aeration device and has a gap with the perforating aeration device. The MBR reactor can ensure the quality of effluent.

Description

Double-self-circulation integrated MBR (membrane bioreactor)

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a double self-circulation integrated MBR (membrane bioreactor).

Background

At present, sewage is often treated using a Membrane Bioreactor (MBR).

As shown in fig. 1, the conventional integrated MBR reactor includes: MBR reaction tank 100, blower 14, suction pump 23, lift pump 24, electric three-way valve 26 and sludge pump 27. Be provided with in this MBR reaction tank: a membrane component 1, a flow guide clapboard 3, an aeration device 4 and a flow exchange control valve 5. Wherein, the MBR reaction tank is divided into by the diversion baffle plate 3: comprises an aerobic zone of a membrane component 1 and an aeration device 4, and an anoxic/anaerobic zone 2. Wherein the anoxic/anaerobic zone 2 is: an area outside the aerobic zone in the MBR reaction tank; the flow guiding clapboard 3 is provided with a flow exchange control valve 5. Wherein, the membrane module includes: a membrane capable of intercepting macromolecular organic matters and activated sludge in sewage, and a supporting structure for supporting the membrane.

In the configuration shown in fig. 1, when sewage is treated, activated sludge is fed into the MBR reaction tank, and then the sewage is lifted into the MBR reaction tank by the lift pump 24, and since a microbial population exists in the activated sludge and the microbial population can decompose organic matter in the sewage in an anoxic/anaerobic environment, the organic matter in the sewage can be decomposed by the activated sludge in the anoxic/anaerobic zone 2, and the sewage after the decomposition of the organic matter flows into the aerobic zone.

In the aerobic zone, the blower 14 and the electric three-way valve 26 supply air to the aeration device 4 and the aeration is performed by the aeration device 4, so that the aerobic environment of the aerobic zone can be maintained. Wherein, in the aeration process, the microorganisms in the activated sludge absorb a large amount of nitrogen and phosphorus in the sewage and breed a large amount of nitrogen and phosphorus in the sewage, so that the concentration of the activated sludge is increased and the contents of nitrogen and phosphorus in the sewage are reduced. Thus, through the filtering action of the membrane module 1, the reclaimed water obtained by filtering can be pumped into a reclaimed water tank through the suction pump 23, and the sewage treatment is completed.

In the sewage treatment process, the reflux quantity of the activated sludge flowing into the anoxic/anaerobic zone 2 from the aerobic zone can be adjusted by manually adjusting the exchange flow control valve 5, namely, single-gas-lift circulation can be generated between the aerobic zone and the anoxic/anaerobic zone 2 by utilizing the control action of aeration energy and the exchange flow control valve 5, so that the activated sludge is continuously circulated in the aerobic, anoxic and anaerobic environments, and the nitrogen and phosphorus removal capacity is improved.

However, the following problems occur when the MBR reactor is used to treat sewage: the nitrogen and phosphorus content of the reclaimed water extracted from the membrane module 1 through the suction pump 23 is unstable, even the nitrogen and phosphorus content exceeds the standard.

In view of the above, how to improve the quality of the effluent of the MBR reactor is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The embodiment of the invention aims to provide a double self-circulation integrated MBR reactor to ensure the quality of effluent.

The embodiment of the invention provides a double self-circulation integrated MBR (membrane bioreactor), which comprises an MBR reaction tank, wherein the MBR reaction tank can be internally provided with: the membrane component, a plurality of flow guide partition plates, a perforation aeration device, a micropore aeration device and a filler bracket;

MBR reaction tank is separated for by the polylith water conservancy diversion baffle: a filler zone comprising a filler support, a biochemical zone comprising a microporous aeration device, and a membrane zone comprising a membrane module and a perforated aeration device; wherein the biochemical region is located between the filler region and the membrane region;

a plurality of flow guide partition plates are spaced from the bottom end of the MBR reaction tank; wherein, a first flow guide clapboard between the membrane area and the biochemical area is also separated from the top end of the MBR reaction tank; a sludge return port is arranged on the second flow guide partition plate between the biochemical region and the filler region;

the filler support is arranged in a filler area and at a position which is spaced from the top end of the MBR reaction tank and the bottom end of the MBR reaction tank; the sludge return port is arranged on the second flow guide partition plate and is positioned above the filler bracket;

the microporous aeration device is arranged in the biochemical area at the bottom of the MBR reaction tank;

the perforating aeration device is arranged in the membrane area at the bottom of the MBR reaction tank;

the membrane component is positioned above the perforating aeration device and has a gap with the perforating aeration device.

Optionally, in an embodiment of the present invention, a sludge return flow control mechanism is provided at the sludge return port.

Optionally, in one implementation, the sludge backflow control mechanism is: the movable flashboard is connected with an axial adjusting device; the movable flashboard is adjustable up and down relative to the sludge return port under the action of the axial adjusting device.

Optionally, in another implementation, the sludge backflow control mechanism is: and a flow exchange control valve.

Optionally, in another embodiment of the present invention, the MBR reactor may further comprise: the controller is arranged outside the MBR reaction tank; a dissolved oxygen measurer is also arranged in the MBR reaction tank;

the controller is electrically connected with the sludge reflux control mechanism;

the dissolved oxygen measurer is arranged in a filler area of the MBR reaction tank; the dissolved oxygen measurer is electrically connected with the controller;

and the controller is used for controlling the sludge backflow control mechanism after receiving the dissolved oxygen data measured by the dissolved oxygen measurer so as to control the flow passing through the sludge backflow port.

Optionally, in another embodiment of the present invention, the MBR reaction tank may further include: a communicating pipe and a return sludge distribution pipe;

a sludge inlet of the communicating pipe is connected to the sludge return port, and a sludge outlet of the communicating pipe is positioned in the filling area; the return sludge distribution pipe is connected with the sludge outlet, and the two horizontal sides of the return sludge distribution pipe are provided with openings.

Optionally, in yet another embodiment of the present invention, the MBR reactor may further comprise: the air blower is arranged outside the MBR reaction tank;

the perforation aeration device and the micropore aeration device are connected to an aeration air supply main pipe through an aeration air supply pipe, and the aeration air supply main pipe is connected to a blower through an electric butterfly valve.

Alternatively, in yet another embodiment of the present invention, the number of membrane zones in the MBR reaction tank is 1, the number of packing zones is 2, and the number of biochemical zones is 2;

the membrane area is positioned at the central position of the MBR reaction tank;

2 biochemical regions are positioned at two sides of the membrane region;

the 2 packing areas are respectively positioned at the outer sides of the adjacent biochemical areas.

In the embodiment of the utility model, the reaction tank of the MBR is divided into membrane area, biochemical area and filler area by the polylith water conservancy diversion baffle. Because the membrane area is provided with the perforating aeration device and the biochemical area is provided with the micropore aeration device, the membrane area and the biochemical area are aerobic areas under the aeration action. In addition, because the upper part and the lower part of the membrane area can exchange the flow with the biochemical area, and the air flow of the perforated aeration device in the membrane area is higher than that of the microporous aeration device in the biochemical area, an air-lift hydraulic circulation can be formed between the membrane area and the biochemical area. And the filling area is not provided with an aeration device, so that the filling area is an anaerobic/anoxic area. In addition, because the upper part of the filler area is provided with a sludge return port which performs flow exchange with the biochemical area, and the lower part of the filler area can perform flow exchange with the biochemical area, under the aeration action of the microporous aeration device in the biochemical area, another air-lift hydraulic circulation can be formed between the biochemical area and the filler area. Therefore, in the sewage treatment process, the activated sludge can be continuously subjected to double circulation in aerobic, anoxic and anaerobic environments, and the nitrogen and phosphorus removal capability is improved. And, because the filler support can fix the filler in the filler district, and the filler can adhere to a large amount of activated sludge, therefore can greatly improve anaerobism/anoxic zone activated sludge concentration, promptly, can degrade the organic matter steadily in the filler district to make this MBR reactor can obtain the less play water of nitrogen phosphorus content steadily, guaranteed the quality of play water.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that 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 the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a conventional MBR reactor;

FIG. 2 is a top view of a dual self-circulation integrated MBR reactor provided in accordance with the present invention;

FIG. 3 is a schematic view of the A-A cross-section of the MBR reactor shown in FIG. 2;

FIG. 4 is a schematic view of the B-B cross-sectional structure of the MBR reactor shown in FIG. 2;

FIG. 5 is a schematic view of the C-C cross-sectional configuration of the MBR reactor shown in FIG. 2;

FIG. 6 is a schematic view of the cross-sectional D-D configuration of the MBR reactor shown in FIG. 3;

FIG. 7 is a schematic view of a return sludge distribution pipe in the embodiment of FIG. 2;

fig. 8 is a schematic view of an inlet water distributor in the embodiment shown in fig. 2.

The components in the drawings are numbered as follows:

1 membrane component, 2 anoxic/anaerobic zone, 3 flow guide partition board, 31 first flow guide partition board, 32 second flow guide partition board, 4 aeration device, 5 flow exchange control valve, 6 membrane zone, 7 biochemical zone, 8 filler zone, 9 perforation aeration device, 10 micropore aeration device, 11 aeration air supply pipe, 12 aeration air supply main pipe, 13 electric butterfly valve, 14 blower, 15 movable flashboard, 16 axial adjusting device, 17 sludge return port, 18 return sludge distribution pipe, 19 filler support, 20 filler, 21 first circulation channel, 22 second circulation channel, 23 suction pump, 24 lift pump, 25 water inlet distribution pipe, 26 electric three-way valve, 27 communicating pipe, 100MBR reaction tank.

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.

For what appears in the current MBR reactor: the nitrogen and phosphorus content of the effluent is unstable, and even the nitrogen and phosphorus content exceeds the standard. The inventor finds that the reason for the phenomenon is as follows: in the process of treating sewage by using such an MBR reactor, in order to ensure that the anaerobic/anoxic zone of the MBR reaction tank 100 is in an anoxic/anaerobic environment, the amount of activated sludge flowing from the aerobic zone into the anaerobic/anoxic zone has to be reduced, and reducing the amount of activated sludge flowing into the anaerobic/anoxic zone results in a low concentration of activated sludge in the anaerobic/anoxic zone (for example, when the activated sludge concentration of the aerobic zone reaches around 6000-. And when the concentration of the activated sludge in the anaerobic/anoxic zone is low, the degradation of organic matters is unstable, so that the content of nitrogen and phosphorus in the effluent of the MBR reactor is unstable, and even the content of nitrogen and phosphorus exceeds the standard.

In order to solve the problems that the nitrogen and phosphorus content of the effluent of the conventional MBR is unstable, and even exceeds the standard, the invention provides a double-self-circulation integrated MBR. The double self-circulation integrated MBR reactor provided by the present invention will be described with reference to fig. 2 to 7.

As shown in fig. 2 and 3, the double self-circulation integrated MBR reactor includes an MBR reaction tank 100, and the MBR reaction tank 100 is provided with: the membrane component 1, a plurality of flow guide partition plates, a perforation aeration device 9, a micropore aeration device 10 and a filler bracket 19;

this MBR reaction tank 100 is separated for by the polylith water conservancy diversion baffle: a filler zone 8 comprising a filler support 19, a biochemical zone 7 comprising a microporous aeration device 9, and a membrane zone 6 comprising a membrane module 1 and a perforated aeration device 9; wherein the biochemical region 7 is located between the filler region 8 and the membrane region 6;

the plurality of flow guide partition plates are spaced from the bottom end of the MBR reaction tank; wherein, a first flow guide clapboard 31 between the membrane area 6 and the biochemical area 7 is also separated from the top end of the MBR reaction tank; a sludge return port is arranged on the second flow guide partition plate 32 between the biochemical region 7 and the filler region 8;

the filler bracket 19 is arranged in the filler area 8 of the MBR reaction tank 100 and is at a position which is spaced from both the top end of the MBR reaction tank and the bottom end of the MBR reaction tank; the sludge return port is arranged on the second flow guide partition plate 32 and is positioned above the filler bracket 19;

the microporous aeration device 10 is arranged in the biochemical area at the bottom of the MBR reaction tank;

the perforated aeration device 9 is arranged in the membrane area at the bottom of the MBR reaction tank;

the membrane module 1 is positioned above the perforated aeration device 9 and is spaced from the perforated aeration device 9.

In the embodiment of the invention, the reaction tank of the MBR is divided into a membrane area, a biochemical area and a filler area by a plurality of flow guide partition plates. Because the membrane area is provided with the perforating aeration device and the biochemical area is provided with the micropore aeration device, the membrane area and the biochemical area are aerobic areas under the aeration action. In addition, because the upper part and the lower part of the membrane area can exchange the flow with the biochemical area, and the air flow of the perforated aeration device in the membrane area is higher than that of the microporous aeration device in the biochemical area, an air-lift hydraulic circulation can be formed between the membrane area and the biochemical area. And the filling area is not provided with an aeration device, so that the filling area is an anaerobic/anoxic area. In addition, because the upper part of the filler area is provided with a sludge return port which performs flow exchange with the biochemical area, and the lower part of the filler area can perform flow exchange with the biochemical area, under the aeration action of the microporous aeration device in the biochemical area, another air-lift hydraulic circulation can be formed between the biochemical area and the filler area. Therefore, in the sewage treatment process, the activated sludge can be continuously subjected to double circulation in aerobic, anoxic and anaerobic environments, and the nitrogen and phosphorus removal capability is improved. And, because the filler support can fix the filler in the filler district, and the filler can adhere to a large amount of activated sludge, therefore can greatly improve anaerobism/anoxic zone activated sludge concentration, promptly, can degrade the organic matter steadily in the filler district to make this MBR reactor can obtain the less play water of nitrogen phosphorus content steadily, guaranteed the quality of play water.

The MBR reaction tank 100 according to the present invention will be described in detail below.

It is understood that, in the present invention, the tank body of the MBR reaction tank 100 may be made of glass fiber reinforced plastics or corrosion-resistant carbon steel or reinforced concrete, and the tank body height may be designed to be 3000 mm. In addition, the MBR reaction tank 100 is divided into a filler area 8, a biochemical area 7 and a membrane area 6 by a plurality of flow guide partition plates having the functions of isolation and flow guide, and the divided biochemical area 7 is located between the filler area 8 and the membrane area 6. Wherein, the baffle between the biochemical region 7 and the membrane region 6 is marked as a first baffle 31, and the baffle between the filler region 8 and the biochemical region 7 is marked as a second baffle 32. In addition, the first baffle plate 31 and the second baffle plate 32 are both spaced from the bottom of the MBR reaction tank by an interval of 100mm to 150mm, but not limited thereto. In addition, the area corresponding to the gap can be used as a first circulation channel 21, so that the sewage and the activated sludge can flow into or out of the filler area 8/biochemical area 7/membrane area 6 through the first circulation channel 21. And the first diversion baffle plate is also separated from the top end of the MBR reaction tank, and the separation can be used as a second circulating channel 22, so that the sewage in the membrane area 6 can flow into the biochemical area 7 through the second circulating channel 22.

It should be noted that the first baffle plate 31 and the second baffle plate 32 may be baffle plates made of the same material, or baffle plates made of different materials, which is reasonable.

The filler region 8, biochemical region 7 and membrane region 6 are described in detail below, respectively.

Firstly, as for the filler area 8, a filler support 19 is installed in the filler area 8; the filler bracket 19 is spaced from both the top end of the MBR reaction tank and the bottom end of the MBR reaction tank. For example, the mounting position of the filler holder 19 may be: the middle area of the filler area 8 is formed by being 280 mm-500 mm away from the top end of the MBR reaction tank and being 300 mm-500 mm away from the bottom end of the MBR reaction tank. More specifically, the mounting positions of the filler holder 19 are: the area of the packing region 8 corresponding to the packing 20 shown in fig. 2 is preferably 380mm from the top of the MBR reaction tank and 400mm from the bottom of the MBR reaction tank, but is not limited thereto.

The filler holder 19 is used for fixing a filler to which macromolecular substances such as activated sludge, microorganisms, and organic substances can be attached. Wherein, the filler can be elastic filler or soft filler. The bottom of the MBR reaction tank refers to the bottom of the MBR reaction tank 100, and the top of the MBR reaction tank refers to the plane corresponding to the top of the MBR reaction tank. The MBR reaction tank 100 may be a rectangular parallelepiped or a cylinder, but is not limited thereto.

In addition, a sludge return port 17 is arranged on the second flow guiding partition plate 32 between the filling area 8 and the biochemical area 7, and the sludge return port 17 is positioned above the filling support 19. In the present invention, the sludge return port 17 provides a passage for the activated sludge in the biochemical region 7 to return to the filler region 8. Also, the size of the sludge recirculation port 17 can be set by those skilled in the art according to the amount of dissolved oxygen required in the filler zone 8 to ensure that the filler zone 8 is in an anoxic/anaerobic state, which will not be described in detail herein.

Further, a sludge return control mechanism may be provided at the sludge return port 17, so that it is possible to control by the sludge return control mechanism: the return amount of the activated sludge flowing into the filler zone 8 through the sludge return port 17, that is, in this case, the return amount of the activated sludge flowing into the filler zone 8 from the biochemical zone 7 is controllable.

As shown in fig. 3, in one implementation, the sludge backflow control mechanism may specifically be: a movable shutter 15 to which an axial adjustment device 16 is connected; the movable gate plate 15 is adjustable up and down relative to the sludge return port 17 under the action of the axial adjusting device 16. Like this, the staff can drive this axial adjusting device 16 at this MBR reaction tank top to drive movable flashboard 15 up-and-down motion, and then realize adjusting the size of mud backward flow mouth 17, thereby can control the activated sludge return flow volume that flows into to filler district 8 from biochemical district 7.

In another implementation, the sludge backflow control mechanism may also be a flow rate exchange control valve, and the flow rate control valve may implement: the return flow of the activated sludge from the biochemical region 7 to the filler region 8 is controlled, and the specific control process is not described in detail here.

Still further, the MBR reactor may further include: a controller disposed outside the MBR reaction tank 100; in addition, the MBR reaction tank 100 is provided with: a dissolved oxygen measurer. The controller is respectively electrically connected with the dissolved oxygen measurer and the sludge reflux control mechanism. Like this, the controller can control the dissolved oxygen caliber and monitor the dissolved oxygen volume in filler district to when receiving the dissolved oxygen data of dissolved oxygen caliber feedback, the controller can judge whether this dissolved oxygen data is greater than and predetermines the dissolved oxygen data, if be greater than, the controller can reduce the flow through this mud backward flow mouth 17 through controlling this mud reflux control mechanism, thereby guarantees that this filler district 8 is in oxygen deficiency/anaerobism state.

It should be noted that, when the sludge backflow control mechanism is: the control can be electrically connected to the axial adjustment device 16 when the movable shutter 15 of the axial adjustment device 16 is connected. The dissolved oxygen meter may be installed below the filler holder 19, but is not limited thereto.

In addition, as shown in fig. 2, the inlet water distributor 25 is disposed in the packing region 8 at a distance of 80mm to 150mm (specifically, 100mm) from the top end of the MBR reaction tank, and of course, the inlet water distributor 25 may also be disposed in the biochemical region, which is not described in detail herein. In addition, as can be seen from fig. 8, 200mm intervals are arranged just below the water inlet distribution pipe 25

The water distribution holes. In this way, the sewage lifted by the lift pump 24 can be made to flow into the stuffing zone 8 uniformly.

In addition, in order to make the activated sludge flowing from the biochemical region 7 to the filler region 8 flow into the filler region 8 uniformly and further make the filler 20 fixed on the filler support 19 adhere to as much activated sludge as possible, in the present invention, a return sludge distribution pipe 18 as shown in fig. 3 and 7 may be further provided in the filler region 8. Wherein, the return sludge distribution pipe 18 can be connected with the sludge outlet of the communication pipe 27, and the sludge inlet of the communication pipe 27 is connected with the sludge return port 17. The communication pipe 27 may specifically be DN80 communication pipe, but is not limited to this.

It should be noted that the return sludge distribution pipe 18 is provided with openings on both horizontal sides. The opening may be sized to

And the distance between any two openings can take any value of 150 mm-250 mm (can be set to 240mm in particular).

In addition, the return sludge distribution pipe 18 may be disposed 200mm to 350mm (specifically, 300mm) above the filler support 19 in the filler zone 8, and is located right below the water inlet distribution pipe 25 in the filler zone 8. Thus, the sewage flowing out from the inlet water distributor 25 and the activated sludge flowing out from the return sludge distributor 18 can be sufficiently mixed, and the microorganisms can sufficiently decompose the organic substances in the sewage.

Next, with respect to the biochemical region 7, the biochemical region 7 is located outside the filler region 8, and the microporous aeration apparatus 10 shown in fig. 3 and 4 is installed in the biochemical region 7. The microporous aeration device 10 can be installed in the biochemical zone 7 at the bottom of the MBR reaction tank, and specifically, the microporous aeration device 10 can be installed in an area in the biochemical zone 7 which is 100 mm-150 mm away from the bottom end of the MBR reaction tank.

It should be noted that the bottom of the MBR reaction tank refers to any position within a preset distance from the bottom of the MBR reaction tank, and the preset distance may be set to be 100mm to 300mm, but is not limited thereto.

In addition, in the case that the micro-porous aeration device 10 performs aeration, the biochemical region 7 is an aerobic region, and during the aeration, the activated sludge in the biochemical region 7 can be pushed to flow into the filler region 8 through the sludge return port 17, so that a gas-lift hydraulic circulation is formed between the biochemical region 7 and the filler region 8 as shown by an arrow in fig. 3, of course, the direction indicated by the arrow is also the flow direction of the activated sludge in the MBR reaction tank 100.

It is also noted that the micro-porous aeration device 10 includes, but is not limited to, a micro-porous aeration disk.

Thereafter, with respect to the membrane section 6, the membrane section 6 is mounted therein with the membrane module 1 and the perforated aeration apparatus 9 as shown in fig. 3 and 5, and the membrane module 1 is located above the perforated aeration apparatus 9 with a space therebetween. Wherein, the perforated aeration device 9 is installed in the membrane area 6 at the bottom of the MBR reaction tank, and specifically, the microporous aeration device 10 can be installed in the area in the membrane area 6 which is 100 mm-150 mm away from the bottom end of the MBR reaction tank.

Each membrane module 1 may include a plurality of membranes, which may be hollow fiber membranes or flat sheet membranes, but is not limited thereto. And the membrane module 1 may be connected by a water collecting pipe, which may be connected to the suction pump 23, by a loose joint or a valve to a water collecting main. It is reasonable, among other things, that one or more membrane modules 1 can be arranged in the membrane area 6. When a plurality of membrane modules 1 are provided in the membrane area 6, the perforated aeration apparatus 9 may be a perforated aeration pipe of a "rich" shape as shown in fig. 6, but is not limited thereto. Of course, when a plurality of membrane modules 1 are disposed in the membrane area 6, the plurality of membrane modules 1 may be divided into two groups, in this case, as shown in fig. 2 and 3, one perforated aeration device 9 may be disposed below each group of membrane modules 1, two sludge return ports 17 may be disposed on the second baffle 32 located above the filler support 19, and each sludge return port 17 is connected to one communicating pipe 27.

It should be noted that, in the case of the aeration performed by the perforated aeration device 9, the membrane area 6 is an aerobic area, and during the aeration, the activated sludge in the membrane area 6 can be pushed to flow into the biochemical area 7, and an air-lift hydraulic circulation is formed between the membrane area 6 and the biochemical area 7 as shown by the arrow in fig. 3, of course, the direction indicated by the arrow is also the flow direction of the activated sludge in the MBR reaction tank 100.

It should be noted that, in order to concentrate the aeration energy of the perforation aeration device 9 to wash the membrane surface of the membrane module 1, the second baffle 32 may be configured as an inverted funnel-shaped structure with a large bottom and a small top as shown in fig. 3, and in such a structure, the washing force on the membrane surface can be increased without increasing the aeration energy.

In addition, the MBR reactor provided by the embodiment of the present invention may further include: an air blower 14 disposed outside the MBR reaction tank 100; thus, the perforated aeration apparatus 9 and the micro-porous aeration apparatus 10 may be connected to the aeration air supply main 12 through the aeration air supply pipe 11, and the aeration air supply main 12 is connected to the blower 14 through the electric butterfly valve 13.

Referring to fig. 1, in the prior art, the gas generated by the blower 1 can be transmitted to the electric three-way valve 26, and the electric three-way valve 26 alternately transmits the gas to the ports B and C of the electric three-way valve 26 by switching, wherein the ports B and C are respectively connected to an aeration device 4. However, the electric three-way valve 26 is switched once for 12 seconds to 15 seconds, that is, the electric three-way valve is frequently switched, and the service life of the electric three-way valve is relatively short due to the frequent switching. More seriously, when the electric three-way valve 26 is damaged, the aeration of the perforated aeration device 4 is stopped, so that the membrane pollution is rapidly increased, and even the membrane in the membrane module 1 is blocked, and the normal operation of the MBR is influenced.

Since the time for switching the electric butterfly valve 13 to the off state can be set to 10 minutes or even longer, the switching time is much longer than the switching time of the electric three-way valve 26, that is, the switching operation of the electric butterfly valve 13 is not frequent, so that the service life of the electric butterfly valve 13 is much longer than that of the electric three-way valve 26.

In addition, the inventor finds that in the switching process of the electric three-way valve 26, aeration amount of 0-25% occurs, namely, little aeration amount exists in the switching process, and in the little aeration amount, the membrane is polluted rapidly, and normal operation of the MBR is influenced. The opening degree of the electric butterfly valve 13 can be set to be 30-50%, that is, the minimum aeration amount of the electric butterfly valve is set to be greater than or equal to 30% when the electric butterfly valve is switched to the off state, so that the situation that the membrane is polluted rapidly when the small aeration amount is generated is avoided, and therefore, in the embodiment of the invention, the electric butterfly valve 13 can be used for replacing the electric three-way valve 26 to avoid the membrane being polluted rapidly.

Alternatively, in one embodiment of the present invention, the number of membrane zones 6 in the MBR reaction tank 100 may be set to 1, the number of packing zones 8 may be set to 2, and the number of biochemical zones 7 may be set to 2; in this implementation, the membrane zone 6 is disposed at the central position of the MBR reaction tank 100 as shown in fig. 2; 2 biochemical regions are positioned at two sides of the membrane region 6; the 2 packing regions 8 are respectively positioned at the outer sides of the adjacent biochemical regions 7. And, the volume ratio of the aerobic zone to the anaerobic/anoxic zone may be set to (2.5-3): 1, i.e. the ratio of the sum of the volumes of the membrane region 6 and the biochemical region 7 to the volume of the filler region 8 is: (2.5-3): 1, although not limited thereto.

The operation of the MBR reactor according to an embodiment of the present invention will be described with reference to fig. 3.

It is understood that the MBR reactor provided by the embodiments of the present invention may include various components as shown in fig. 3, which are not described herein.

In the case of sewage purification using the MBR reactor shown in fig. 3, activated sludge for inoculation may be introduced into the membrane zone 6 and the biochemical zone 7, and thereafter, sewage treatment may be started:

the operation of the lift pump 24 is controlled so that the lift pump 24 lifts the sewage to the inlet water distributor 25, and the valve on the inlet water distributor 25 can be adjusted so that the sewage can flow into the filler region through the inlet water distributor 25 and then flow into the whole MBR reaction tank 100. Meanwhile, the size of the sludge return port 17 is adjusted by the axial adjusting device 16, so that the sludge return amount between the biochemical region 7 and the filler region 8 is adjusted, the dissolved oxygen DO at the lower part of the filler region 8 is ensured to be below 0.2mg/L, the filler region 8 is ensured to be in an anaerobic and anoxic environment, and organic matters in the sewage can be decomposed in the filler region 8.

Wherein, when the sewage volume in MBR reaction tank 100 reaches and predetermines high liquid level, can start two electric butterfly valve 13, and after 5 seconds that start two electric butterfly valve 13, start air-blower 14, wherein, can set up two electric butterfly valve 13 and can carry out in proper order and close and open (promptly reset) the operation, promptly when an electric butterfly valve 13 carries out the closing operation, another electric butterfly valve 13 carries out the operation that resets, like this, can make aeration equipment can carry out intermittent variable aeration, reduce the aeration energy consumption, and, can provide sufficient oxygen for biochemical district 7 and membrane district 6, so that the microorganism body adsorbs the nitrogen phosphorus in the sewage in a large number in biochemical district 7 and membrane district 6, purify sewage. In addition, the closing operation can be set to be only closed to 30% of the maximum aeration amount at the lowest, so that the condition that the membrane is quickly polluted at the low aeration amount (0-25%) can be effectively avoided; besides, the time for switching off to on (i.e. resetting) operation can be set to 10 minutes, so as to reduce the switching frequency and prolong the service life.

And after aerating for 1 minute, the suction pump 23 can be started to pump water in the membrane module 1 for 4 minutes, and the suction pump 23 is controlled to stop pumping water after continuously pumping water for 4 minutes; after stopping for 1 minute, continuing to start the suction pump 23 to pump water for 4 minutes; wherein, after suction pump 23 draws water, when the sewage in MBR reaction tank 100 reaches and predetermines the well liquid level, open elevator pump 24 and promote sewage and to this MBR reaction tank 100 moisturizing, when reaching and predetermine high liquid level, close elevator pump 24 and stop the moisturizing, that is to say, the moisturizing is the process of reciprocating cycle with stopping the moisturizing.

And when the MBR reaction tank 100 reaches a preset low liquid level, stopping running the MBR reactor and giving an alarm.

In addition, when the sludge concentration in the MBR reaction tank 100 rises to 6g/L, the aeration rate can be increased; when the sludge concentration exceeds 9-12g/L, sludge can be discharged periodically, and the sludge discharge amount can be set according to the preset sludge age.

Of course, the MBR reactor provided by the embodiment of the present invention may include a controller and a dissolved oxygen measurer, which are not shown in fig. 3, in addition to the various components shown in fig. 3. Wherein the controller is disposed outside the MBR reaction tank 100 of the MBR reactor, and the dissolved oxygen meter is disposed inside the packing region 8. The controller is electrically connected to the electric butterfly valve 13, the blower 14, the axial direction adjustment device 16, the suction pump 23, the lift pump 24, and the dissolved oxygen meter.

It is understood that, in this implementation manner, the electric butterfly valve 13, the blower 14, the axial adjustment device 16, the suction pump 23, the lift pump 24, and the dissolved oxygen meter may be controlled by the controller, that is, the operations described in the above working principle may be controlled by the controller, and will not be described herein. In addition, the controller may further: when the starting of the two electric butterfly valves 13 is controlled, the dissolved oxygen measurer is controlled to measure the dissolved oxygen, then the axial adjusting device 16 is controlled according to the dissolved oxygen data fed back by the dissolved oxygen measurer, and the size of the sludge return port 17 is adjusted by controlling the axial adjusting device 16, so that the sludge return amount between the biochemical region 7 and the filler region 8 is adjusted, the dissolved oxygen DO at the lower part of the filler region 8 is ensured to be below 0.2mg/L, and the filler region is ensured to be in an anaerobic and anoxic environment.

It should be noted that the MBR reactor of the present invention can be debugged by a debugging method of the MBR reactor in the prior art, and the membrane module of the MBR reactor of the present invention can be cleaned by a cleaning method of the membrane module in the prior art, which is not described in detail herein.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a two self-loopings integration MBR reactor, its characterized in that, includes MBR reaction tank, be provided with in the MBR reaction tank: the membrane component, a plurality of flow guide partition plates, a perforation aeration device, a micropore aeration device and a filler bracket;

the MBR reaction tank is separated into by the polylith water conservancy diversion baffle: a filler zone comprising the filler support, a biochemical zone comprising the microporous aeration device, and a membrane zone comprising the membrane assembly and a perforated aeration device; wherein the biochemical region is located between the filler region and the membrane region;

the plurality of flow guide partition plates are spaced from the bottom end of the MBR reaction tank; wherein a first flow guide clapboard between the membrane area and the biochemical area is also separated from the top end of the MBR reaction tank; a sludge return port is formed in the second flow guide partition plate between the biochemical region and the filler region;

the filler support is arranged in the filler area and at a position which is spaced from the top end of the MBR reaction tank and the bottom end of the MBR reaction tank; the sludge return port is arranged on the second flow guide partition plate and is positioned above the filler bracket;

the micropore aeration device is arranged in the biochemical area at the bottom of the MBR reaction tank;

the perforated aeration device is arranged in the membrane area at the bottom of the MBR reaction tank;

the membrane component is positioned above the perforating aeration device, and a gap is reserved between the membrane component and the perforating aeration device;

the number of the membrane areas in the MBR reaction tank is 1, the number of the filler areas is 2, and the number of the biochemical areas is 2;

the membrane area is positioned in the central position of the MBR reaction tank;

2 biochemical regions are positioned at two sides of the membrane region;

2. The reactor of claim 1, wherein a sludge return control mechanism is provided at the sludge return port.

3. The reactor of claim 2, wherein the sludge backflow control mechanism is: the movable flashboard is connected with an axial adjusting device; the movable flashboard is arranged on the sludge return port and can be adjusted up and down relative to the sludge return port under the action of the axial adjusting device.

4. The reactor of claim 2, wherein the sludge backflow control mechanism is: and a flow exchange control valve.

5. The reactor of claim 2, wherein the MBR reactor further comprises: the controller is arranged outside the MBR reaction tank; a dissolved oxygen measurer is also arranged in the MBR reaction tank;

the controller is electrically connected with the sludge backflow control mechanism;

the dissolved oxygen measurer is arranged in a filling area of the MBR reaction tank; the dissolved oxygen measurer is electrically connected with the controller;

6. The reactor of claim 1, wherein the MBR reaction tank is further provided with: a communicating pipe and a return sludge distribution pipe;

a sludge inlet of the communicating pipe is connected to the sludge return port, and a sludge outlet of the communicating pipe is positioned in the filling area; the return sludge distribution pipe is connected with the sludge outlet, and openings are formed in the two horizontal sides of the return sludge distribution pipe.

7. The reactor of claim 1, wherein the MBR reactor further comprises: the air blower is arranged outside the MBR reaction tank;

the perforation aeration device and the micropore aeration device are connected to an aeration air supply main pipe through an aeration air supply pipe, and the aeration air supply main pipe is connected to the air blower through an electric butterfly valve.