CN216377638U

CN216377638U - Reactor for strengthening formation and stable operation of aerobic granular sludge

Info

Publication number: CN216377638U
Application number: CN202123364041.3U
Authority: CN
Inventors: 黄文力; 刘东方; 柳文浩; 纪元
Original assignee: Nankai University
Current assignee: Nankai University
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-26
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a reactor for strengthening formation and stable operation of aerobic granular sludge, which comprises a reactor main body, wherein an air stripping pipe is arranged in the reactor main body, a spiral baffle plate is arranged in the air stripping pipe, a first aerator is arranged at the bottom of the inner side of the air stripping pipe, and a second aerator is arranged at the outer side of the air stripping pipe and the bottom between the air stripping pipe and the reactor main body. The utility model has the characteristics of simple operation, low investment, stable efficiency and convenient maintenance.

Description

Reactor for strengthening formation and stable operation of aerobic granular sludge

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a reactor for strengthening formation and stable operation of aerobic granular sludge.

Background

At present, more than 4000 urban sewage treatment plants are built in China for treating urban domestic sewage and industrial wastewater, the treatment rate of urban sewage is more than 95%, wherein a biological method is the most widely applied technology of the urban sewage treatment plants, but in recent years, higher requirements on the discharge standard, the treatment efficiency, the floor area, the energy consumption and the carbon discharge of the sewage treatment plants are provided in the face of the current situations that the requirements of people on the environmental quality are continuously improved, the urban development land is short, and the carbon emission of the whole society is reduced, so that the development of an efficient, energy-saving and low-carbon sewage treatment technology is urgently needed.

The aerobic granular sludge is granular activated sludge formed by the self-coagulation of microorganisms, and has the advantages of good sedimentation performance, high biomass, rich microbial community, strong impact resistance, strong decontamination capability and the like. Meanwhile, the aerobic-anoxic-anaerobic special layered structure can be formed from outside to inside, which is beneficial to synchronously removing organic matters, nitrogen and phosphorus pollutants in the reactor.

At present, an SBR batch reactor is mainly used for culturing aerobic granular sludge, particularly a gas stripping type SBR reactor, but a plurality of problems need to be solved in the application of the SBR batch reactor. Firstly, although many air-lift SBR reactor patents can cultivate granular sludge prototypes in laboratories by using simulated sewage in 2-4 weeks, the speed of completing granulation of sludge is slow and the time is even as long as 3-6 months when the actual sewage is treated; secondly, the bottom of the outer side of the gas stripping pipe is not provided with a sludge disturbing device, so that sludge is easy to settle at the bottom to form a dead zone, and further the operation of the sludge is unstable and the sewage treatment efficiency is low; moreover, the aerator is arranged in the stripping pipe, so that the dissolved oxygen in the stripping pipe is too high, the oxygen transfer efficiency is low, and the energy consumption is high, while the concentration of the dissolved oxygen in the sewage outside the stripping pipe is difficult to control, and the stable operation and the energy consumption of the reactor are influenced. Therefore, the method has important practical and scientific significance on realizing the rapid granulation of the activated sludge in the gas stripping SBR reactor, reducing the dead zone area and effectively controlling the dissolved oxygen concentration so as to further realize the long-term stable low-energy-consumption operation of the reactor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a reactor for strengthening the formation and stable operation of aerobic granular sludge.

In order to achieve the purpose, the utility model adopts the following technical scheme: the reactor for strengthening the formation and stable operation of aerobic granular sludge comprises a reactor main body, wherein an air stripping pipe is arranged in the reactor main body, a spiral baffle plate is arranged in the air stripping pipe, a first aerator is arranged at the bottom of the inner side of the air stripping pipe, and a second aerator is arranged at the outer side of the air stripping pipe and the bottom of the space between the outer side of the air stripping pipe and the reactor main body.

As a further description of the above technical solution:

the number of the gas stripping pipes is 2-50, the gas stripping pipes are uniformly and vertically arranged at the bottom of the reactor main body, and the ratio of the center distance between every two adjacent gas stripping pipes to the inner diameter of each gas stripping pipe is 2-10.

As a further description of the above technical solution:

4-12 holes are arranged at the bottom of the tube wall of the gas stripping tube at intervals.

As a further description of the above technical solution:

the tube top of the gas stripping tube is lower than the reactor main body, and the height-diameter ratio of the gas stripping tube is between 2 and 8.

As a further description of the above technical solution:

the number of the rotating rings of the spiral baffle plate is between 1 and 5, and the height ratio of the spiral baffle plate to the stripping tube is between 0.2 and 1.

As a further description of the above technical solution:

the first aerator is arranged at the bottom of the inner side of the air stripping pipe and below the spiral baffle plate, and comprises a plurality of microporous aeration discs and aeration pipes.

As a further description of the above technical solution:

the second aerator is uniformly arranged at the outer space position of the air stripping pipe and comprises a plurality of microporous aeration discs and aeration pipes.

As a further description of the above technical solution:

the left side wall of reactor main part runs through and is provided with the inlet tube, one side of inlet tube is provided with intake pump and flowmeter, the right side wall of reactor main part runs through and is provided with the drain pipe, one side of drain pipe is provided with the drain valve.

As a further description of the above technical solution:

the bottom of reactor main part and the bottom of gas stripping pipe all run through and are provided with the blast pipe, one side of blast pipe is provided with the aeration pump, blast pipe one side of reactor main part junction is provided with the second gas flowmeter, gas stripping pipe junction's blast pipe one side is provided with first gas flowmeter.

The utility model has the following beneficial effects:

1. compared with the prior art, this strengthen aerobic granule mud formation and steady operation's reactor, reactor body inside according to this application is provided with a plurality of even, the air stripping pipe of vertical distribution, set up the spiral baffling board in the gas pipe, the first aerator of bottom installation, can make gas, sewage and mud carry out the whirl motion of rising formula in the air stripping pipe, increase the dwell time of three in the air stripping pipe, improve hydraulic shear force and oxygen mass transfer efficiency, the formation of granule mud with higher speed, compare with current air stripping formula SBR granule mud reactor, engineering application potentiality greatly promotes.

2. Compared with the prior art, this strengthen aerobic granule mud formation and steady operation's reactor, the reactor according to this application is equipped with the second aerator between adjacent gas pipe outer wall, can control the dissolved oxygen concentration in the sewage, carry out the disturbance to bottom mud simultaneously, prevent effectively that mud from subsiding to the bottom, reduce the interior dead zone area of reactor, maintain the steady operation of granule, in addition, the second aerator provides ascending hydraulic shear force, gas and mud form the convection current from top to bottom, and then accelerate the formation of granule mud.

3. Compared with the prior art, the reactor for strengthening the formation and stable operation of the aerobic granular sludge has the characteristics of simple operation, lower investment, stable efficiency and convenient maintenance.

Drawings

FIG. 1 is a schematic view of the overall structure of a reactor for enhancing aerobic granular sludge formation and stable operation according to the present invention;

FIG. 2 is a top view of the main body of the reactor for enhancing the formation and stable operation of aerobic granular sludge according to the present invention.

Illustration of the drawings:

1. a reactor body; 2. a gas stripping tube; 3. a helical baffle plate; 4. opening a hole; 5. a first aerator; 6. a second aerator; 7. a water inlet pump; 8. a flow meter; 9. an aeration pump; 10. a first gas flow meter; 11. a second gas flow meter; 12. and (4) draining the water valve.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, one embodiment of the present invention is provided: a reactor for strengthening formation and stable operation of aerobic granular sludge comprises a reactor main body 1, wherein gas stripping pipes 2 are arranged in the reactor main body 1, the number of the gas stripping pipes 2 is 2-50, the gas stripping pipes are uniformly and vertically arranged at the bottom of the reactor main body 1, the ratio of the center distance of the adjacent gas stripping pipes 2 to the inner diameter of the gas stripping pipes 2 is 2-10, 4-12 openings 4 are arranged at the bottom of the pipe wall of each gas stripping pipe 2 at intervals, the top of each gas stripping pipe 2 is lower than that of the reactor main body 1, and the height-diameter ratio of each gas stripping pipe 2 is 2-8.

The inside of air stripping pipe 2 is provided with spiral baffling board 3, the rotating ring number of spiral baffling board 3 is between 1-5, the ratio of the height of spiral baffling board 3 and air stripping pipe 2 is between 0.2-1, the inboard bottom of air stripping pipe 2 is provided with first aerator 5, first aerator 5 sets up the inboard bottom at air stripping pipe 2, the below of spiral baffling board 3, first aerator 5 includes a plurality of micropore aeration dish and aeration pipe, the outside of air stripping pipe 2 and reactor main part 1 between the bottom be provided with second aerator 6, second aerator 6 evenly sets up the outside spatial position at air stripping pipe 2, second aerator 6 includes a plurality of micropore aeration dish and aeration pipe.

The left side wall of reactor main part 1 runs through and is provided with the inlet tube, and one side of inlet tube is provided with intake pump 7 and flowmeter 8, and the right side wall of reactor main part 1 runs through and is provided with the drain pipe, and one side of drain pipe is provided with drain valve 12.

The bottom of reactor main part 1 and the bottom of gas stripping pipe 2 all run through and are provided with the intake pipe, and one side of intake pipe is provided with aeration pump 9, and intake pipe one side of being connected with reactor main part 1 is provided with second gas flowmeter 11, and intake pipe one side of being connected with gas stripping pipe 2 is provided with first gas flowmeter 10.

The working principle is as follows: after the water inlet of the water inlet pipe is finished through the water inlet system, the sewage enters a non-aeration stage, microorganisms in the sludge decompose organic matters under anoxic and anaerobic conditions to perform denitrification and phosphorus release effects, in the aeration stage, the first aerator 5 provides high aeration flow velocity in the gas stripping pipe 2, the spiral baffle plate 3 enables sewage, gas stripping and sludge to perform ascending type rotational flow motion in the gas stripping pipe 2, meanwhile, negative pressure is formed at the bottom of the gas stripping pipe 2 to enable the sewage and active sludge outside the gas stripping pipe 2 to flow into the gas stripping pipe 2 through the opening 4, the sewage and active sludge rising to the top of the gas stripping pipe 2 descend along the outer side of the pipe wall under the driving of the inflow water body, so that the circular flow of the sewage and sludge inside and outside the gas stripping pipe 2 is formed, the first aerator 5 is combined with the spiral baffle plate 3, and therefore, higher hydraulic shearing force and action time are favorably formed, the formation of aerobic granular sludge is accelerated, and the stable structure of the aerobic granular sludge is maintained, the second aerator 6 carries out micro-aeration, the dissolved oxygen concentration in the sewage is controlled, the downward flowing sludge and the rising bubbles form convection, thus being beneficial to forming higher hydraulic shearing force to accelerate the formation of aerobic granular sludge, in addition, the micro-aeration can also form disturbance to the sludge settled at the bottom, the sludge is effectively prevented from settling at the bottom, the dead zone area of the reactor main body 1 is reduced, the stable operation of granules is maintained, the microorganisms in the sludge degrade organic matters under the aerobic condition, nitrification and phosphorus uptake effects are carried out, pollutants in the sewage are efficiently removed, in the settling stage, the aeration is stopped, the solid-liquid separation of the sludge and a water body is realized, the sludge is settled at the bottom, and the purified sewage is discharged from a drain pipe through a drainage system. Through above-mentioned control process, can accomplish flocculent activated sludge's miniaturation fast, effective control dissolved oxygen reduces the blind spot area, has realized good oxygen granular sludge reactor's high efficiency, stable, long-term operation to can continuously maintain excellent sewage purification effect.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A reactor for enhancing aerobic granular sludge formation and stable operation, comprising a reactor main body (1), characterized in that: the reactor is characterized in that an air stripping pipe (2) is arranged in the reactor main body (1), a spiral baffle plate (3) is arranged in the air stripping pipe (2), a first aerator (5) is arranged at the bottom of the inner side of the air stripping pipe (2), and a second aerator (6) is arranged at the bottom of the outer side of the air stripping pipe (2) and between the outer side of the air stripping pipe and the reactor main body (1).

2. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the number of the gas stripping pipes (2) is 2-50, the gas stripping pipes are uniformly and vertically arranged at the bottom of the reactor main body (1), and the ratio of the center distance between every two adjacent gas stripping pipes (2) to the inner diameter of each gas stripping pipe (2) is 2-10.

3. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: 4-12 open pores (4) are arranged at the bottom of the tube wall of the gas stripping tube (2) at intervals.

4. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the tube top of the gas stripping tube (2) is lower than the reactor main body (1), and the height-diameter ratio of the gas stripping tube (2) is between 2 and 8.

5. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the number of the rotating rings of the spiral baffle plate (3) is between 1 and 5, and the height ratio of the spiral baffle plate (3) to the stripping pipe (2) is between 0.2 and 1.

6. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the first aerator (5) is arranged at the bottom of the inner side of the air stripping pipe (2) and below the spiral baffle plate (3), and the first aerator (5) comprises a plurality of microporous aeration discs and aeration pipes.

7. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the second aerator (6) is uniformly arranged at the outer space position of the air stripping pipe (2), and the second aerator (6) comprises a plurality of microporous aeration discs and aeration pipes.

8. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the left side wall of reactor main part (1) runs through and is provided with the inlet tube, one side of inlet tube is provided with intake pump (7) and flowmeter (8), the right side wall of reactor main part (1) runs through and is provided with the drain pipe, one side of drain pipe is provided with drain valve (12).

9. The reactor of claim 1, wherein the aerobic granular sludge is enhanced to form and stably operate, and the reactor further comprises: the bottom of reactor main part (1) and the bottom of gas lift pipe (2) all run through and are provided with the blast pipe, one side of blast pipe is provided with aeration pump (9), blast pipe one side of reactor main part (1) junction is provided with second gas flowmeter (11), blast pipe one side of gas lift pipe (2) junction is provided with first gas flowmeter (10).