Bioelectrochemical membrane reactor device

Abstract

The invention relates to the technical field of bioelectrochemical membrane reactors, and discloses a bioelectrochemical membrane reactor device which comprises a treatment tank, and a sewage chamber, an anode chamber, a cathode chamber, a membrane reaction chamber and a water purification chamber are sequentially arranged in the treatment tank. Mutually communicated water pumps are sequentially mounted among the sewage chamber, the anode chamber, the cathode chamber and the membrane reaction chamber, a supporting plate is fixedly mounted in the membrane reaction chamber, a plurality of rotating pipes are rotatably mounted on the upper surface of the supporting plate at equal intervals in a penetrating manner, and membrane separation pipes communicated with the interiors of the rotating pipes are fixedly mounted at the bottom ends of the rotating pipes; and a rotating joint is mounted at the top end of the rotating pipe. The rotating pipe drives the membrane separation pipe to rotate, the flowing state of the surface of the membrane separation pipe is enhanced, accumulation of sediments is reduced, deposition of pollutants on the surface of the membrane separation pipe is reduced, formation of a pollution layer is slowed down, and therefore membrane pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bioelectrochemical membrane reactors, and particularly to a bioelectrochemical membrane reactor device. Background Art

[0002] The membrane bioreactor combines the activated sludge process with membrane separation technology, and is mainly used for the treatment and reuse of domestic sewage and industrial sewage. Compared with traditional biological treatment methods, it has advantages such as good solid-liquid separation effect, high removal rate, and small floor area. However, membrane fouling seriously affects the normal operation of the MBR, so it has become a bottleneck for the wide application of the MBR. At the same time, the traditional aerobic MBR has a poor treatment effect on refractory industrial wastewater and has no obvious denitrification effect.

[0003] An existing membrane bioelectrochemical reactor device with high-quality effluent and low membrane fouling (Publication No.: CN103241895B) has at least the following drawbacks: When the above patent is used, the sewage first enters the anaerobic MFC anode, and anaerobic electricity-producing microorganisms perform hydrolysis and acidification pretreatment. Subsequently, the sewage enters the MBR, and part of the effluent is refluxed to the anaerobic anode chamber, which can further achieve the denitrification of the sewage. The recovery of energy by the MFC and the in-situ utilization of electric energy, the effective control of membrane fouling and the efficient treatment of sewage are realized; since the existing membrane is fixedly arranged during the separation operation of the sewage, pollutants in the sewage are easily adhered to the membrane surface, resulting in the occurrence of membrane fouling. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a bioelectrochemical membrane reactor device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A bioelectrochemical membrane reactor device includes a treatment tank. Inside the treatment tank, a sewage chamber, an anode chamber, a cathode chamber, a membrane reaction chamber, and a purified water chamber are sequentially arranged. Water pumps that are interconnected are sequentially installed between the sewage chamber, the anode chamber, the cathode chamber, and the membrane reaction chamber. A support plate is fixedly installed inside the membrane reaction chamber. The upper surface of the support plate is equidistantly penetrated and rotatably installed with a plurality of rotating tubes. The bottom ends of the plurality of rotating tubes are fixedly installed with membrane separation tubes that are communicated with their interiors. A rotary joint is installed at the top end of the rotating tube. A pumping drum is fixedly installed at the top of the treatment tank where the membrane reaction chamber is located. A communicating pipe that is mutually conducting is installed between the water inlet end of the pumping drum and the rotary joint. A drain pipe that drains water to the purified water chamber is fixedly installed at the water outlet end of the pumping drum. A pumping assembly is installed inside the pumping drum.

[0007] As a further solution of the present invention, the pumping assembly includes a pumping impeller rotatably installed inside the pumping drum, and a rotating mechanism is installed between the pumping impeller and the rotating pipe.

[0008] As a further solution of the present invention, the rotating mechanism includes a driving bevel gear fixedly installed at the rotation center of the pumping impeller. A transmission shaft is rotatably installed on the outer surface of the pumping drum. A driven bevel gear is fixedly installed at the top end of the transmission shaft. The driving bevel gear meshes with the driven bevel gear. A transmission gear is fixedly installed on the outer surface of each rotating pipe, and multiple transmission gears mesh with each other. A driving gear is rotatably installed on the upper surface of the support plate. The driving gear meshes with one of the transmission gears, and a transmission assembly is installed between the driving gear and the transmission shaft.

[0009] As a further solution of the present invention, the transmission assembly includes two belt pulleys respectively fixedly installed at the rotation centers of the driving gear and the transmission shaft, and a belt is sleeved on the outer surfaces of the two belt pulleys.

[0010] As a further solution of the present invention, an aeration mechanism is installed inside the membrane reaction chamber. The aeration mechanism includes a lifting plate slidably installed between the inner walls on opposite sides of the treatment tank. An aeration pipe is fixedly installed on the outer surface of the lifting plate close to the membrane separation pipe. A plurality of aeration holes are uniformly formed through the outer surface of the aeration pipe close to the membrane separation pipe. An aeration assembly is installed between the outer surface of the pumping drum and the aeration pipe. A lifting assembly for driving the aeration pipe to move up and down is installed between the support plate and the treatment tank.

[0011] As a further solution of the present invention, the aeration assembly includes an air extraction drum fixedly installed on the outer surface of the pumping drum. An air extraction impeller is rotatably installed inside the air extraction drum. The air extraction impeller is fixedly installed at the rotation center of the pumping impeller. A hose that is mutually communicated is fixedly installed between the air outlet end of the air extraction drum and the aeration pipe. An air inlet pipe is fixedly installed at the air inlet end of the air extraction drum.

[0012] As a further solution of the present invention, the lifting assembly includes a reciprocating lead screw rotatably installed between the support plate and the bottom of the treatment tank. The reciprocating lead screw penetrates through the outer surface of the lifting plate and is threadedly connected thereto. The top end of the reciprocating lead screw is fixedly installed at the rotation center of the driving gear.

[0013] As a further solution of the present invention, a stepping motor is fixedly installed on the outer surface of the air extraction drum, and the output end of the stepping motor is fixedly installed at the rotation center of the air extraction impeller.

[0014] The beneficial effects of the present invention are:

[0015] 1. While the pumping impeller rotates, it drives the driven bevel gear meshing with it through the driving bevel gear, causing the driven bevel gear to drive the driving gear to rotate through the transmission shaft, belt pulley and belt, enabling the driving gear to drive the transmission gear meshing with it, and enabling a plurality of sequentially meshing transmission gears to drive the membrane separation tube to rotate through the rotating tube, enhancing the flow state on the surface of the membrane separation tube, reducing the accumulation of sediments, helping to reduce the deposition of pollutants on the surface of the membrane separation tube, slowing down the formation of the pollution layer, and thus reducing the occurrence of membrane pollution;

[0016] 2. When the air extraction impeller rotates, external air is inhaled into the aeration pipe through the hose by the intake pipe, and then blown onto the surface of the membrane separation tube through a plurality of aeration holes on the surface of the aeration pipe, enhancing the fluidity of the sewage, reducing the deposition of particulate matter and organic matter on the membrane surface, reducing membrane pollution, thus delaying the pollution process of the membrane, and the movement of the bubbles generated by aeration can not only help the mixed liquid, but also improve the fluid flow state near the membrane surface, avoid the formation of dead zones, and improve the separation efficiency of the membrane separation tube. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of a bioelectrochemical membrane reactor device proposed by the present invention;

[0018] Figure 2 It is a schematic diagram of the top structure of a bioelectrochemical membrane reactor device proposed by the present invention;

[0019] Figure 3 It is a schematic diagram of the installation structure of the membrane separation tube of a bioelectrochemical membrane reactor device proposed by the present invention;

[0020] Figure 4 It is a schematic diagram of the internal structure of the pumping drum and the air extraction drum of a bioelectrochemical membrane reactor device proposed by the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the membrane separation tube of a bioelectrochemical membrane reactor device proposed by the present invention;

[0022] Figure 6 It is Figure 4 The enlarged view of the structure at A in

[0023] Figure 7 It is Figure 4 The enlarged view of the structure at B in

[0024] In the figure: 1, treatment tank; 2, sewage chamber; 3, anode chamber; 4, cathode chamber; 5, membrane reaction chamber; 6, purified water chamber; 7, water pump; 8, support plate; 9, rotating pipe; 10, membrane separation pipe; 11, pumping drum; 12, connecting pipe; 13, rotary joint; 14, drain pipe; 15, transmission gear; 16, pumping impeller; 17, driving bevel gear; 18, transmission shaft; 19, driven bevel gear; 20, driving gear; 21, belt pulley; 22, belt; 23, reciprocating lead screw; 24, lifting plate; 25, aeration pipe; 26, air extraction drum; 27, air extraction impeller; 28, hose; 29, air inlet pipe; 30, stepper motor. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Next, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0027] Referring to the attached Figure 1 - attached Figure 7 , a bioelectrochemical membrane reactor device, including a treatment tank 1. Inside the treatment tank 1, a sewage chamber 2, an anode chamber 3, a cathode chamber 4, a membrane reaction chamber 5, and a purified water chamber 6 are sequentially arranged. Water pumps 7 that are interconnected are sequentially installed between the sewage chamber 2, the anode chamber 3, the cathode chamber 4, and the membrane reaction chamber 5. The treatment method and working principle of the anode chamber 3 and the cathode chamber 4 for sewage are well-known technologies in the art and will not be elaborated here; inside the membrane reaction chamber 5, a support plate 8 is fixedly installed. The upper surface of the support plate 8 is equidistantly penetrated and rotatably installed with a plurality of rotating pipes 9. The bottom ends of the plurality of rotating pipes 9 are fixedly installed with membrane separation pipes 10 that are communicated with their interiors. The top ends of the rotating pipes 9 are installed with rotary joints 13. A pumping drum 11 is fixedly installed at the top of the treatment tank 1 corresponding to the membrane reaction chamber 5. A connecting pipe 12 that is mutually conductive is installed between the water inlet end of the pumping drum 11 and the rotary joint 13. The water outlet end of the pumping drum 11 is fixedly installed with a drain pipe 14 that drains water to the purified water chamber 6. A pumping assembly is installed inside the pumping drum 11.

[0028] In this embodiment, the pumping assembly includes a pumping impeller 16 rotatably installed inside the pumping drum 11. A rotating mechanism is installed between the pumping impeller 16 and the rotating pipe 9. After the sewage treated by the anode chamber 3 and the cathode chamber 4 enters the membrane reaction chamber 5, the air extraction impeller 27 and the pumping impeller 16 are driven to rotate by the stepper motor 30. When the pumping impeller 16 rotates, a negative pressure is generated in the membrane separation pipe 10 through the communication pipe 12 and the rotating pipe 9, enabling the sewage in the membrane reaction chamber 5 to pass through the membrane separation pipe 10 and enter its interior, separating the impurities in the sewage. The treated reclaimed water is discharged into the purified water chamber 6 through the drain pipe 14 for storage. The rotating mechanism includes a driving bevel gear 17 fixedly installed at the rotation center of the pumping impeller 16. A transmission shaft 18 is rotatably installed on the outer surface of the pumping drum 11. A driven bevel gear 19 is fixedly installed at the top of the transmission shaft 18. The driving bevel gear 17 meshes with the driven bevel gear 19. A transmission gear 15 is fixedly installed on the outer surface of each rotating pipe 9. The multiple transmission gears 15 mesh with each other. A driving gear 20 is rotatably installed on the upper surface of the support plate 8. The driving gear 20 meshes with one of the transmission gears 15. A transmission assembly is installed between the driving gear 20 and the transmission shaft 18. The transmission assembly includes two pulleys 21 respectively fixedly installed at the rotation centers of the driving gear 20 and the transmission shaft 18. A belt 22 is sleeved on the outer surfaces of the two pulleys 21.

[0029] While the pumping impeller 16 rotates, it drives the meshing driven bevel gear 19 to rotate through the driving bevel gear 17, enabling the driven bevel gear 19 to drive the driving gear 20 to rotate through the transmission shaft 18, the pulley 21 and the belt 22, causing the driving gear 20 to drive the meshing transmission gear 15 to rotate, enabling the multiple sequentially meshing transmission gears 15 to drive the membrane separation pipe 10 to rotate through the rotating pipe 9, enhancing the flow state on the surface of the membrane separation pipe 10, reducing the accumulation of sediments, helping to reduce the deposition of pollutants on the surface of the membrane separation pipe 10, slowing down the formation of the pollution layer, and thus reducing the occurrence of membrane fouling.

[0030] In this embodiment, an aeration mechanism is installed inside the membrane reaction chamber 5. The aeration mechanism includes a lifting plate 24 slidably installed between the inner walls on opposite sides of the treatment tank 1. On the outer surface of the lifting plate 24 close to the membrane separation tube 10, an aeration pipe 25 is fixedly installed. A number of aeration holes are evenly penetrated through the outer surface of the aeration pipe 25 close to the membrane separation tube 10. An aeration assembly is installed between the outer surface of the pumping drum 11 and the aeration pipe 25. A lifting assembly for driving the aeration pipe 25 to move up and down is installed between the support plate 8 and the treatment tank 1. The aeration assembly includes an air extraction drum 26 fixedly installed on the outer surface of the pumping drum 11. An air extraction impeller 27 is rotatably installed inside the air extraction drum 26. The rotation center of the air extraction impeller 27 is fixedly installed with that of the pumping impeller 16. A hose 28 that is mutually communicated is fixedly installed between the air outlet end of the air extraction drum 26 and the aeration pipe 25. An air inlet pipe 29 is fixedly installed at the air inlet end of the air extraction drum 26. An air filter is installed at the air inlet of the air inlet pipe 29. A stepping motor 30 is fixedly installed on the outer surface of the air extraction drum 26. The output end of the stepping motor 30 is fixedly installed with the rotation center of the air extraction impeller 27.

[0031] When the air extraction impeller 27 rotates, external air will be sucked into the aeration pipe 25 through the air inlet pipe 29 and the hose 28, and then blown onto the surface of the membrane separation tube 10 through the multiple aeration holes on the surface of the aeration pipe 25, enhancing the fluidity of the sewage, reducing the deposition of particulate matter and organic matter on the membrane surface, reducing membrane fouling, thereby delaying the membrane fouling process. And the movement of the bubbles generated by aeration can not only help the mixed liquid, but also improve the fluid flow state near the membrane surface, avoid the formation of dead zones, and improve the separation efficiency of the membrane separation tube 10.

[0032] In this embodiment, the lifting assembly includes a reciprocating lead screw 23 rotatably installed between the support plate 8 and the bottom of the treatment tank 1. The reciprocating lead screw 23 penetrates through the outer surface of the lifting plate 24 and is threadedly connected thereto. The top end of the reciprocating lead screw 23 is fixedly installed with the rotation center of the driving gear 20.

[0033] When the driving gear 20 rotates, it will drive the reciprocating lead screw 23 to rotate, so that the reciprocating lead screw 23 can drive the aeration pipe 25 to move up and down through the lifting plate 24, enabling the aeration pipe 25 to perform cleaning operations on the entire surface of the membrane separation tube 10.

[0034] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: When in use, the sewage in the sewage chamber 2 is pumped into the anode chamber 3 and the cathode chamber 4 in sequence by the water pump 7, so that the anode chamber 3 and the cathode chamber 4 can decompose the organic pollutants in the sewage, so as to filter and separate the treated sewage through the membrane separation tube 10 in the membrane reaction chamber 5 subsequently;

[0035] After the sewage treated by the anode chamber 3 and the cathode chamber 4 enters the membrane reaction chamber 5, the air extraction impeller 27 and the water pumping impeller 16 are driven to rotate by the stepping motor 30. When the water pumping impeller 16 rotates, a negative pressure is generated in the membrane separation tube 10 through the communication pipe 12 and the rotating pipe 9, enabling the sewage in the membrane reaction chamber 5 to penetrate into the membrane separation tube 10 through it, separating the impurities in the sewage. The reclaimed water after separation is discharged into the water purification chamber 6 through the drain pipe 14 for storage;

[0036] While the water pumping impeller 16 rotates, it will drive the driven bevel gear 19 meshing with it to rotate through the driving bevel gear 17, enabling the driven bevel gear 19 to drive the driving gear 20 to rotate through the transmission shaft 18, the belt pulley 21 and the belt 22, and enabling the driving gear 20 to drive the transmission gear 15 meshing with it to rotate, so that a plurality of sequentially meshing transmission gears 15 can drive the membrane separation tube 10 to rotate through the rotating pipe 9, enhancing the flow state on the surface of the membrane separation tube 10, reducing the accumulation of sediments, helping to reduce the deposition of pollutants on the surface of the membrane separation tube 10, slowing down the formation of the pollution layer, and thus reducing the occurrence of membrane fouling;

[0037] When the air extraction impeller 27 rotates, external air will be inhaled into the aeration pipe 25 through the inlet pipe 29 and the hose 28, and then blown onto the surface of the membrane separation tube 10 through a plurality of aeration holes on the surface of the aeration pipe 25, enhancing the fluidity of the sewage, reducing the deposition of particulate matter and organic matter on the membrane surface, reducing membrane fouling, thus delaying the membrane fouling process, and the movement of the bubbles generated by aeration can not only help the mixed liquid, but also improve the fluid flow state near the membrane surface, avoiding the formation of dead zones and enhancing the separation efficiency of the membrane separation tube 10.

[0038] While the driving gear 20 rotates, it will drive the reciprocating lead screw 23 to rotate, enabling the reciprocating lead screw 23 to drive the aeration pipe 25 to move up and down through the lifting plate 24, so that the aeration pipe 25 can clean the entire surface of the membrane separation tube 10.

[0039] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bioelectrochemical membrane reactor device, comprising a treatment tank (1), wherein a sewage chamber (2), an anode chamber (3), a cathode chamber (4), a membrane reaction chamber (5) and a water purification chamber (6) are sequentially arranged inside the treatment tank (1), and water pumps (7) which are interconnected are sequentially installed between the sewage chamber (2), the anode chamber (3), the cathode chamber (4) and the membrane reaction chamber (5), characterized in that: A support plate (8) is fixedly installed inside the membrane reaction chamber (5), and a plurality of rotating tubes (9) are equidistantly penetrated and rotatably installed on the upper surface of the support plate (8). The bottom ends of the plurality of rotating tubes (9) are fixedly installed with membrane separation tubes (10) connected to the inside thereof, and a rotating joint (13) is installed at the top of the rotating tube (9). A pumping drum (11) is fixedly installed on the top of the membrane reaction chamber (5) in the treatment tank (1), and a connecting pipe (12) that is mutually conductive is installed between the water inlet end of the pumping drum (11) and the rotating joint (13). A drainage pipe (14) for discharging water to the water purification chamber (6) is fixedly installed at the water outlet end of the pumping drum (11), and a pumping assembly is installed inside the pumping drum (11).

2. A bioelectrochemical membrane reactor device according to claim 1, characterized in that: The water pumping assembly comprises a water pumping impeller (16) rotatably mounted inside a water pumping drum (11), and a rotating mechanism is installed between the water pumping impeller (16) and the rotating pipe (9).

3. A bioelectrochemical membrane reactor device according to claim 2, characterized in that: The rotating mechanism comprises a driving bevel gear (17) fixedly mounted on the rotating center of the pumping impeller (16); a transmission shaft (18) is rotatably mounted on the outer surface of the pumping drum (11); a driven bevel gear (19) is fixedly mounted on the top of the transmission shaft (18); the driving bevel gear (17) is meshed with the driven bevel gear (19); a transmission gear (15) is fixedly mounted on the outer surface of each rotating tube (9); a plurality of transmission gears (15) are meshed with each other; a driving gear (20) is rotatably mounted on the upper surface of the support plate (8); the driving gear (20) is meshed with one of the transmission gears (15); and a transmission assembly is mounted between the driving gear (20) and the transmission shaft (18).

4. A bioelectrochemical membrane reactor device according to claim 3, characterized in that: The transmission assembly comprises two pulleys (21) respectively fixedly mounted on the driving gear (20) and the rotation center of the transmission shaft (18), and the outer surfaces of the two pulleys (21) are sleeved with belts (22).

5. A bioelectrochemical membrane reactor device according to claim 4, characterized in that: An aeration mechanism is installed inside the membrane reaction chamber (5), and the aeration mechanism comprises a lifting plate (24) slidably installed between the inner walls of the treatment tank (1) on two opposite sides, an aeration tube (25) is fixedly installed on the outer surface of the lifting plate (24) on the side close to the membrane separation tube (10), and a plurality of aeration holes are evenly penetrated through the outer surface of the aeration tube (25) on the side close to the membrane separation tube (10), an aeration component is installed between the outer surface of the pumping drum (11) and the aeration tube (25), and a lifting component for driving the aeration tube (25) to move up and down is installed between the support plate (8) and the treatment tank (1).

6. A bioelectrochemical membrane reactor device according to claim 5, characterized in that: The aeration assembly comprises an air extraction drum (26) fixedly mounted on the outer surface of a water extraction drum (11); an air extraction impeller (27) is rotatably mounted inside the air extraction drum (26); the air extraction impeller (27) is fixedly mounted at the rotation center of the water extraction impeller (16); a hose (28) which is in communication with each other is fixedly mounted between the air outlet end of the air extraction drum (26) and the aeration pipe (25); and an air intake pipe (29) is fixedly mounted at the air intake end of the air extraction drum (26).

7. A bioelectrochemical membrane reactor device according to claim 6, characterized in that: The lifting assembly comprises a reciprocating screw (23) rotatably mounted between a support plate (8) and the bottom of a treatment pool (1); the reciprocating screw (23) penetrates the outer surface of a lifting plate (24) and is threadedly connected thereto; the top end of the reciprocating screw (23) is fixedly mounted to the rotation center of a driving gear (20).

8. A bioelectrochemical membrane reactor device according to claim 7, characterized in that: A stepping motor (30) is fixedly mounted on the outer surface of the air extraction drum (26), and an output end of the stepping motor (30) is fixedly mounted to the rotation center of the air extraction impeller (27).

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