CN218290596U

CN218290596U - Periodic aeration MABR device

Info

Publication number: CN218290596U
Application number: CN202222772244.4U
Authority: CN
Inventors: 王盼星; 关请; 周龙坤; 关晓琳; 王怀林
Original assignee: Jiangsu Kaimi Membrane Technology Co ltd
Current assignee: Jiangsu Kaimi Membrane Technology Co ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-01-13
Anticipated expiration: 2032-10-20

Abstract

The utility model discloses a periodic aeration MABR device, including the MABR membrane module, the MABR membrane module includes last diaphragm capsule, lower diaphragm capsule and membrane silk, goes up the diaphragm capsule and is equipped with the upper diaphragm chamber, and the lower diaphragm capsule is equipped with lower diaphragm chamber I and lower diaphragm chamber II that do not communicate with each other, and the upper and lower both ends of membrane silk communicate with upper diaphragm chamber and lower diaphragm chamber I respectively, and the upper diaphragm capsule is connected through first body and second body with lower diaphragm capsule, and first body does not communicate with the upper diaphragm capsule, and the upper end of first body is equipped with first air inlet, and the lower extreme communicates with lower diaphragm chamber I; the upper end of second body is equipped with the second gas vent, and second body and last diaphragm chamber and lower diaphragm chamber II intercommunication are equipped with a plurality of center tubes in the lower diaphragm capsule, center tube lower extreme and lower diaphragm chamber II intercommunication, and the upper end communicates with each other with membrane silk exterior space, and the bottom of lower diaphragm chamber II is equipped with the water inlet. The utility model discloses an adopt the periodic gas phase circulation mode that closed and circulation combined together to carry out the oxygen suppliment and erode the MABR subassembly, improved the efficiency of getting rid of and the gas transmission efficiency of pollutant.

Description

Periodic aeration MABR device

Technical Field

The utility model relates to a sewage treatment technical field, concretely relates to periodic aeration MABR device.

Background

A Membrane-aerated biofilm reactor (MABR) is a novel sewage biological treatment technology for carrying out aeration oxygen supply by utilizing a permeable Membrane, the MABR carries out anisotropic mass transfer in a foamless aeration mode, oxygen permeates the Membrane from the air side of the Membrane and then diffuses to the sewage side, a nitrification reaction occurs at the sewage side to form a nitrified microbial Membrane layer, and ammonia nitrogen and organic matters in a biochemical pool carry out mass transfer to the MABR Membrane. Because the mass transfer rate of ammonia nitrogen in the water phase is higher, the ammonia nitrogen preferentially contacts with oxygen and generates a biological membrane mainly comprising nitrobacteria on the surface of the MABR membrane, so that the nitrification reaction and the denitrification reaction are synchronously carried out. Compared with the traditional porous or microporous aeration device, the membrane aeration biomembrane reactor has low oxygen utilization efficiency, and the oxygen transfer efficiency can approach 100 percent due to the adoption of a non-bubble aeration mode. The MABR has obvious advantages in the treatment of high-concentration wastewater due to high-efficiency oxygen mass transfer rate, high biological membrane surface area and internal and external layered special biological membrane structure.

In the oxygen supply process of the existing MABR system, the gas-phase circulation mode is divided into a closed mode and a circulation mode. In the closed mode, since the distal end of the membrane is sealed, oxygen within the membrane lumen is delivered to the biofilm, achieving 100% oxygen transfer efficiency. However, back diffusion of gases can also occur, for example, nitrogen and other dissolved gases produced by the biofilm can diffuse into the membrane lumen, increasing mass transfer resistance, resulting in a reduced oxygen transfer rate. In the flow-through mode, the membrane lumen has a high gas flow rate and oxygen partial pressure, so that gas not utilized by the biofilm can be discharged through the distal end of the membrane in time. However, in the flow-through mode, there is a large amount of gas loss from the distal end of the membrane, resulting in a reduced oxygen utilization. At the same time, the higher gas flow rate increases the frictional losses between the gas and the membrane wall, and thus increases the energy losses in the oxygen supply process.

In addition, because MABR biofilm reactor uses a period of time after, the microorganism content on membrane silk surface can increase gradually, and outer biomembrane can age gradually, causes the holistic purifying effect of membrane module to descend, consequently need through the washing and the swing to the membrane silk, with biomembrane thickness control in reasonable within range, current wash the mode and use again to the membrane silk when discovering the purifying effect to descend after a period of time, it is unsatisfactory to wash the effect.

SUMMERY OF THE UTILITY MODEL

For solving the big, oxygen transmission rate of closed mode mass transfer resistance that exists among the oxygen suppliment process of current MABR system, oxygen utilization ratio is low under the circulation mode to and wash the unsatisfactory technical problem of effect, the utility model provides a periodic aeration MABR device.

The utility model adopts the technical proposal that:

a periodic aeration MABR device comprises an MABR membrane assembly, wherein the MABR membrane assembly comprises an upper membrane box, a lower membrane box and a membrane wire, the upper membrane box is provided with an upper membrane cavity, the lower membrane box is divided into a lower membrane cavity I and a lower membrane cavity II which are not communicated with each other by a lower membrane partition plate, the upper end and the lower end of the membrane wire are respectively communicated with the upper membrane cavity and the lower membrane cavity I, the upper membrane box and the lower membrane box are connected through a first pipe body and a second pipe body, the first pipe body is not communicated with the upper membrane box, the upper end of the first pipe body is provided with a first air inlet, the lower end of the first pipe body is provided with a first exhaust port, and the first exhaust port is communicated with the lower membrane cavity I; the upper end of the second pipe body is provided with a second exhaust port, the lower end of the second pipe body is provided with a second air inlet, the second air inlet is communicated with the lower film cavity II, and the second pipe body is communicated with the upper film cavity through a three-way pipe B; a plurality of central tubes are arranged in the lower membrane box, the lower ends of the central tubes penetrate through the lower membrane partition plate to be communicated with the lower membrane cavity II, the upper ends of the central tubes penetrate through the lower membrane cavity I to be communicated with the outer space of the membrane filaments, and water inlets in one-to-one correspondence with the central tubes are formed in the bottoms of the lower membrane cavities II.

By adopting the technical scheme, compressed air or oxygen enters the lower membrane cavity I of the lower membrane box through the first air inlet and the first tube body, enters the MABR membrane wires through the lower membrane cavity I, and is subjected to flow-type oxygenation, so that sufficient oxygen is provided for sewage treatment, and meanwhile, a unique microorganism layered structure is formed on the surface of the MABR membrane wires; the tail gas after aeration is discharged out of the MABR membrane component through the upper membrane cavity, the second tube body and the second exhaust port in sequence; after the first air inlet continuously admits air for 30-60 min, temporarily stopping admitting air for 30-60 s, in the process that the first air inlet temporarily admits air, enabling compressed air or oxygen to enter a lower membrane cavity II of a lower membrane box through a second air outlet and a second tube body, enabling the compressed air or the oxygen to enter the outer space of the MABR membrane wire through a central tube after the lower membrane cavity II is mixed with water entering from a water inlet, scouring the membrane wire, and promoting the biological membrane on the surface of the membrane wire to fall off; and the second air inlet continuously admits air for 30-60 s and then stops admitting air, the first air inlet continuously admits air for 30-60 min again, the first air inlet and the second air outlet alternately admit air, and the MABR membrane wires are supplied with oxygen and washed by adopting a closed and flow-through combined periodic gas phase circulation mode, so that the removal efficiency of pollutants and the gas transmission efficiency are improved.

Furtherly, still include gas holder, blast pipe, intake pipe A, intake pipe B and air pump, the gas holder passes through blast pipe and second gas vent intercommunication, and intake pipe A and gas holder intercommunication are passed through in the air pump import, and the air pump export is passed through intake pipe B and blast pipe intercommunication, is equipped with exhaust solenoid valve on the blast pipe, and exhaust solenoid valve locates between air pump and the gas holder.

By adopting the technical scheme, in the process of air inlet of the first air inlet, the aerated tail gas is discharged out of the MABR membrane module through the upper membrane cavity, the second tube body and the second air outlet in sequence and enters the air storage tank through the exhaust pipe for storage; when the first air inlet stops air inlet, residual air stored in the air storage tank is transmitted to the lower membrane cavity II through the second tube body by the air pump, membrane filaments are subjected to closed oxygenation and scouring, so that gas is recycled, and energy consumption is saved.

Furthermore, the first air inlet is connected with an air inlet pipe C, and an air inlet electromagnetic valve is arranged on the air inlet pipe C. The opening and closing of the first air inlet are automatically controlled by an air inlet electromagnetic valve.

Furthermore, the air pump, the exhaust electromagnetic valve and the air inlet electromagnetic valve are respectively connected with the PLC. The start-stop and air inlet and outlet time of the air pump, the air outlet electromagnetic valve and the air inlet electromagnetic valve are automatically controlled by the PLC, so that the high-efficiency operation of the MABR membrane module is realized.

Furthermore, the first pipe body is connected with the upper film box through a three-way pipe A, and the three-way pipe A and the upper film cavity are separated by an air-blocking partition plate. Adopt three-way pipe connection body and last diaphragm capsule, simple structure simple to operate sets up the gas barrier baffle and can effectively prevent from the direct discharge of last diaphragm capsule of the gas that first air inlet got into.

Further, first body passes through elbow bend A and is connected with lower diaphragm capsule, and the second body passes through elbow bend B and is connected with lower diaphragm capsule, and elbow bend A and elbow bend B's bottom sets up the stabilizer blade. The right-angle elbow enables the connection structure of the tube body and the lower diaphragm capsule to be simple, installation is convenient, and supporting legs are convenient to set to support the whole diaphragm assembly, so that the water inlet is exposed in the environment and water can be conveniently fed.

The utility model has the advantages that:

1. this application adopts the periodic gas phase circulation mode that closed and circulation combined together to supply oxygen and erode the MABR subassembly, has improved the efficiency of getting rid of and the gas transmission efficiency of pollutant, has solved that the closed mode mass transfer resistance that current MABR system exists at the oxygen suppliment in-process is big, oxygen transmission rate is low, the technical problem that oxygen utilization ratio is low under the circulation mode.

2. This application carries out air water mixed scouring to MABR membrane silk through periodic aeration, can effectively detach too much microorganism on the biomembrane and make it reach normal level, keeps the biomembrane thickness moderate, makes its thickness control in 600-1200um, is favorable to the biomembrane to form the layering, for the synchronous nitrification denitrification creates the advantage in the biomembrane to improve sewage treatment effect.

Drawings

Fig. 1 is a schematic structural diagram of a periodic aeration MABR device according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a periodic aeration MABR apparatus according to embodiment 2 of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and a preferred embodiment.

Example 1

Referring to fig. 1, the embodiment provides a periodic aeration MABR device, which comprises membrane modules, wherein each MABR membrane module comprises an upper membrane box 2, a lower membrane box 3 and a membrane wire 1, each upper membrane box is provided with an upper membrane cavity 21, each lower membrane box is divided into a lower membrane cavity i 31 and a lower membrane cavity ii 32 which are not communicated with each other by a lower membrane partition plate, the upper end and the lower end of each membrane wire 1 are respectively communicated with the upper membrane cavity 21 and the lower membrane cavity i 31, the upper membrane box 2 and the lower membrane box 3 are connected through a first pipe body 4 and a second pipe body 5, the first pipe body 5 is not communicated with the upper membrane box 2, the upper end of the first pipe body 4 is provided with a first air inlet 101, the lower end of the first pipe body is provided with a first exhaust port, and the first exhaust port is communicated with the lower membrane cavity i 31; the upper end of the second pipe body 5 is provided with a second exhaust port 102, the lower end of the second pipe body is provided with a second air inlet, the second air inlet is communicated with the lower film cavity II 32, and the second pipe body 5 is communicated with the upper film cavity 21 through a three-way pipe B6; a plurality of central tubes 7 are arranged in the lower diaphragm capsule 3, the lower ends of the central tubes 7 penetrate through the lower diaphragm partition plate to be communicated with the lower diaphragm cavity II 32, the upper ends of the central tubes 7 penetrate through the lower diaphragm cavity I31 to be communicated with the external space of the diaphragm filaments 1, and water inlets 103 which are in one-to-one correspondence with the central tubes 7 are arranged at the bottoms of the lower diaphragm cavities II 31.

In specific implementation, two ends of hollow fiber membrane filaments 1 which are bundled are respectively cast in an upper membrane box 2 and a lower membrane box 3, and the two ends of the hollow fiber membrane filaments 1 extend out of a casting layer, so that a membrane filament cavity is communicated with an upper membrane cavity 21 and a lower membrane cavity I31. The membrane filaments are bundled to be arranged, so that the central tube 7 can be surrounded in the middle of the membrane filaments, the flushing effect of the central tube on the membrane filaments is improved, for example, 9 groups of filament bundles are arranged in the implementation, the central tube 7 and the water inlet 103 are correspondingly arranged below each group of filament bundles, and the water inlet 103 is arranged right below the central tube 7.

The first pipe body 4 is arranged on the left side of the membrane component, and the upper end and the lower end of the first pipe body 4 are respectively connected with the upper membrane box 2 and the lower membrane box 3 through a three-way pipe A8 and a right-angle elbow A9. One end of the three-way pipe A8 is fixedly sleeved at the upper end of the first pipe body 4, the other end of the three-way pipe A8 is fixedly connected with the upper diaphragm capsule 2, a through hole communicated with the three-way pipe A8 is formed in the side wall of the first pipe body 4, and a gas barrier partition plate 81 for separating the pipe cavity of the three-way pipe A8 from the upper diaphragm cavity 21 is arranged in the three-way pipe A8. The fixed suit of elbow bend A9 one end is at the lower extreme of first body 4, and bellows 3 under the other end fixed connection, first body 4 and the lower diaphragm chamber I31 of lower diaphragm capsule 3 pass through elbow bend A9 intercommunication, elbow bend A9's bottom fixedly connected with left side stabilizer blade 11.

The second pipe body 5 is arranged on the right side of the membrane component, and the upper end and the lower end of the second pipe body 5 are respectively connected with the upper membrane box 2 and the lower membrane box 3 through a three-way pipe B6 and a right-angle elbow B10. The fixed suit of three-way pipe B6 one end is in the upper end of second body 5, and the other end is fixed to connect the upper diaphragm capsule 2, and the through-hole of intercommunication three-way pipe B6 is seted up to the lateral wall of second body 5, and second body 5 passes through three-way pipe B6 and communicates last die cavity 21. The fixed suit of elbow bend B10 one end is at the lower extreme of second body 5, and other end fixed connection lower diaphragm capsule 3, and second body 5 passes through elbow bend B10 intercommunication with lower diaphragm chamber II 31 of lower diaphragm capsule 3, and elbow bend B10's bottom fixedly connected with right side stabilizer blade 12.

When the membrane module is used in the embodiment 1, the whole membrane module is placed in a sludge mixed solution, the first air inlet 101 and the second air outlet 102 are respectively connected with a compressed air tank or an oxygen tank through a pipeline and a valve, so that compressed air or oxygen enters the lower membrane cavity I31 of the lower membrane box through the first air inlet 101 and the first pipe body 4 and enters the inside of the MABR membrane wire 1 through the lower membrane cavity I31, the membrane wire 1 is subjected to flow-type oxygenation, sufficient oxygen is provided for sewage treatment, and meanwhile, a unique microorganism layered structure is formed on the surface of the MABR membrane wire; the tail gas after aeration is discharged out of the MABR membrane module through the upper membrane cavity 21, the second pipe body 5 and the second exhaust port 102 in sequence; after the first air inlet 101 continuously admits air for 30-60 min, temporarily stopping admitting air for 30-60 s, in the process that the first air inlet 101 suspends admitting air, enabling compressed air or oxygen to enter a lower membrane cavity II 32 of a lower membrane box through a second air outlet 102 and a second pipe body 5, mixing the compressed air or oxygen with water entering from a water inlet 103 in the lower membrane cavity II 32, then entering an external space of an MABR membrane wire through a central pipe 7, washing the membrane wire, and promoting the falling of a biological membrane on the surface of the membrane wire; meanwhile, a small amount of gas partially enters the MABR membrane wires 1 through the upper membrane cavity 21 to carry out closed oxygenation on the membrane wires 1; and stopping air intake after the second air inlet 102 continuously admits air for 30-60 s, continuously admitting air for 30-60 min through the first air inlet 101 again, alternately admitting air through the first air inlet 101 and the second air outlet 102 according to the mode, and periodically supplying oxygen and flushing the MABR membrane wires.

Example 2

Referring to fig. 2, the structure of embodiment 2 is substantially the same as that of embodiment 1, except that the periodic aeration MABR apparatus further includes an air tank 41, an air pump 42, an air discharge pipe 43, an air supply pipe a44, an air supply pipe B45, an air supply pipe C46, an air supply solenoid valve 47, an air discharge solenoid valve 48, and a PLC controller (not shown).

The air storage tank 41 is communicated with the second air outlet 102 through an air exhaust pipe 43, the air pump inlet is communicated with the air storage tank 41 through an air inlet pipe A44, the air pump outlet is communicated with the air exhaust pipe 43 through an air inlet pipe B45, an air exhaust electromagnetic valve 48 is arranged on the air exhaust pipe 43, and the air exhaust electromagnetic valve 48 is positioned on the air exhaust pipe 43 which is connected with the air inlet pipe B45 and the air storage tank 41. An intake pipe C46 is connected to the first intake port 101, and an intake solenoid valve 47 is provided in the intake pipe C46. The air storage tank 41, the air pump 42, the air inlet electromagnetic valve 47 and the air outlet electromagnetic valve 48 are respectively connected with a PLC controller. PLC controllers are prior art.

In the use of embodiment 2, the whole membrane module is placed in the sludge mixed liquid, the air inlet pipe C46 is connected with the compressed air tank or the oxygen tank, the PLC controller controls the air inlet solenoid valve 47 and the air outlet solenoid valve 48 to be opened, so that the gas in the compressed air tank or the oxygen tank enters the first air inlet 101 through the air inlet solenoid valve 47 and the air inlet pipe C46, the gas is input from the first air inlet 101, enters the lower membrane cavity i 31 through the first pipe body 4, enters the MABR membrane wires under the action of air pressure, the oxygen is input to the aeration membrane wires, the oxygen is transmitted to the membrane surface from the MABR membrane wires, the rest gas is discharged from the upper ends of the MABR membrane wires, enters the upper membrane cavity 21, and then overflows from the second air outlet 102, passes through the air outlet pipe 43 and the air outlet solenoid valve 48, and enters the air storage tank 41. The first air inlet 101 stops 30 s-60 s after air is fed every 30 min-60 min, when the first air inlet 101 stops feeding air, the PLC controls the air inlet electromagnetic valve 47 and the air outlet electromagnetic valve 48 to be closed, the air pump 42 is started, the air in the air storage tank 41 is input into the lower membrane cavity II 32 through the air inlet pipe A44, the air inlet pipe B45, the second air outlet 102 and the second pipe body 5 by the air pump 42, and after being mixed with water entering from the water inlet 103, the air enters the external space of the MABR membrane wires through the central pipe 7, and the membrane wires are flushed. And controlling the first air inlet 101 and the second air outlet 102 to alternately intake and exhaust air in the above manner, and periodically supplying oxygen and flushing the MABR membrane wires.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and the improvements and modifications are also within the protection scope of the present invention.

Claims

1. The utility model provides a periodic aeration MABR device, includes the MABR membrane module, the MABR membrane module includes diaphragm capsule (2), lower diaphragm capsule (3) and membrane silk (1), goes up the diaphragm capsule and is equipped with diaphragm chamber (21), and lower diaphragm capsule is separated for each other not communicating lower diaphragm chamber I (31) and lower diaphragm chamber II (32) by lower diaphragm baffle, and the upper and lower both ends of membrane silk (1) communicate with last diaphragm chamber (21) and lower diaphragm chamber I (31) respectively, its characterized in that:

the upper diaphragm capsule (2) is connected with the lower diaphragm capsule (3) through a first tube body (4) and a second tube body (5), the first tube body (4) is not communicated with the upper diaphragm capsule (2), the upper end of the first tube body (4) is provided with a first air inlet (101), the lower end of the first tube body is provided with a first exhaust port, and the first exhaust port is communicated with the lower diaphragm capsule I (31); the upper end of the second pipe body (5) is provided with a second exhaust port (102), the lower end of the second pipe body is provided with a second air inlet, the second air inlet is communicated with the lower film cavity II (32), and the second pipe body (5) is communicated with the upper film cavity (21) through a three-way pipe B (6);

a plurality of center tubes (7) are arranged in the lower membrane box, the lower ends of the center tubes penetrate through the lower membrane partition plate to be communicated with the lower membrane cavity II (32), the upper ends of the center tubes penetrate through the lower membrane cavity I (31) to be communicated with the outer space of the membrane yarn, and water inlets (103) which correspond to the center tubes (7) one by one are arranged at the bottoms of the lower membrane cavities II (32).

2. A periodic aeration MABR apparatus according to claim 1, wherein: still include air reservoir (41), blast pipe (43), intake pipe A (44), intake pipe B (45), intake pipe C (46) and air pump (42), air reservoir (41) are through blast pipe (43) and second gas vent (102) intercommunication, the air pump import is through intake pipe A (44) and air reservoir (41) intercommunication, the air pump export is through intake pipe B (45) and blast pipe (43) intercommunication, be equipped with exhaust solenoid valve (48) on blast pipe (43), exhaust solenoid valve (48) are located between air pump (42) and air reservoir (41).

3. A periodic aeration MABR apparatus according to claim 2, wherein: the first air inlet (101) is connected with an air inlet pipe C (46), and an air inlet electromagnetic valve (47) is arranged on the air inlet pipe C (46).

4. A periodic aeration MABR device according to claim 3, wherein: the air pump (42), the exhaust electromagnetic valve (48) and the air inlet electromagnetic valve (47) are respectively connected with the PLC.

5. A periodic aeration MABR apparatus according to claim 1, wherein: the first pipe body (4) is connected with the upper film box (2) through a three-way pipe A (8), and the three-way pipe A (8) is separated from the upper film cavity (21) through an air-blocking partition plate (81).

6. A periodic aeration MABR apparatus according to claim 1, wherein: first body (4) are connected with lower membrane box (3) through elbow bend A (9), and second body (5) are connected with lower membrane box (3) through elbow bend B (10), and elbow bend A (9) and elbow bend B (10)'s bottom sets up the stabilizer blade.