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

Abstract

The utility model discloses a reactor for strengthening the formation and stable operation of aerobic granular sludge, comprising a reactor main body, an air lift pipe is arranged inside the reactor main body, and a helical folded pipe is arranged inside the air lift pipe A flow plate, a first aerator is arranged at the inner bottom of the air stripping pipe, and a second aerator is arranged at the bottom between the outer side of the air stripping pipe and the main body of the reactor. The utility model has the characteristics of simple operation, low investment, stable performance and easy maintenance.

Description

A 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 the formation and stable operation of aerobic granular sludge.

Background technique

At present, my country has built more than 4,000 urban sewage treatment plants to treat urban domestic sewage and industrial wastewater, and the urban sewage treatment rate is over 95%. Among them, biological method is the most widely used technology in urban sewage treatment plants. The continuous improvement of environmental quality requirements, the shortage of land for urban development and the status quo of carbon emission reduction in the whole society have put forward higher requirements for the discharge standards, treatment efficiency, floor space, energy consumption and carbon emissions of sewage treatment plants. Therefore, it is urgent to It is necessary to develop high-efficiency, energy-saving and low-carbon sewage treatment technology.

Aerobic granular sludge is a granular activated sludge formed by the self-aggregation of microorganisms. It has the advantages of good sedimentation performance, high biomass, rich microbial community, strong impact resistance, and strong decontamination ability. At the same time, it can form a special layered structure of aerobic-anoxic-anaerobic from the outside to the inside, which is helpful for the simultaneous removal of organic matter, nitrogen and phosphorus pollutants in the reactor. The above characteristics make the aerobic granular sludge When treating sewage, it has the characteristics of small footprint, low energy consumption and operating cost, and high pollutant removal efficiency.

At present, the SBR batch reactor is mainly used to cultivate aerobic granular sludge, especially the air-stripping SBR reactor, but there are still many problems to be solved in its application. First of all, although many air-stripping SBR reactor patents can be used to cultivate the prototype of granular sludge in the laboratory using simulated sewage in 2-4 weeks, when the actual sewage is treated, the rate of sludge granulation is slow and the time is even long. 3-6 months; secondly, there is no sludge disturbance device at the bottom of the outer side of the air lift pipe, which causes the sludge to easily settle at the bottom to form a dead zone, which in turn leads to unstable sludge operation and low sewage treatment efficiency; moreover, the installation of aerators In the stripping tube, the dissolved oxygen in the stripping tube is too high, the oxygen transfer efficiency is low, and the energy consumption is high, and the dissolved oxygen concentration in the sewage outside the stripping tube is difficult to control, which affects the stable operation and energy consumption of the reactor. Therefore, how to realize the rapid granulation of activated sludge, reduce the dead zone area, effectively control the dissolved oxygen concentration in the air-stripping SBR reactor, and then realize the long-term stable operation of the reactor with low energy consumption has important practical and scientific significance.

Utility model content

The purpose of the utility model is to solve the shortcomings of the prior art, and propose a reactor for strengthening the formation and stable operation of aerobic granular sludge.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a reactor for strengthening the formation and stable operation of aerobic granular sludge, comprising a reactor main body, the inside of the reactor main body is provided with a gas stripping pipe, the The inside of the air-lifting pipe is provided with a helical baffle, the inner bottom of the air-lifting pipe is provided with a first aerator, and the outer side of the air-lifting pipe and the bottom between the main body of the reactor is provided with a second aerator .

As a further description of the above technical solutions:

The number of the stripping tubes is 2-50, and they are uniformly and vertically arranged at the bottom of the reactor main body, and the ratio between the center distance of the adjacent stripping tubes and the inner diameter of the stripping tubes is between 2-10.

As a further description of the above technical solutions:

There are 4-12 openings spaced apart at the bottom of the pipe wall of the air stripping pipe.

As a further description of the above technical solutions:

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

As a further description of the above technical solution:

The number of rotating rings of the helical baffle is between 1-5, and the ratio of the height of the helical baffle to the air lifter is between 0.2-1.

As a further description of the above technical solutions:

The first aerator is arranged at the inner bottom of the stripping pipe and below the helical baffle, and the first aerator includes a plurality of microporous aeration discs and aeration pipes.

As a further description of the above technical solutions:

The second aerator is evenly arranged in the outer space of the stripping pipe, and the second aerator includes a plurality of microporous aeration discs and aeration pipes.

As a further description of the above technical solution:

The left side wall of the reactor main body is provided with a water inlet pipe, one side of the water inlet pipe is provided with an inlet pump and a flow meter, the right side wall of the reactor main body is provided with a drain pipe, and the drain pipe is provided with a drain pipe. There is a drain valve on one side.

As a further description of the above technical solutions:

Both the bottom end of the reactor main body and the bottom end of the stripping pipe are provided with an exhaust pipe, one side of the exhaust pipe is provided with an aeration pump, and one side of the exhaust pipe at the connection of the reactor main body is provided There is a second gas flow meter, and a first gas flow meter is provided on one side of the exhaust pipe at the connection of the stripping pipe.

The utility model has the following beneficial effects:

1. Compared with the prior art, this kind of reactor for strengthening the formation and stable operation of aerobic granular sludge, according to the present application, the reactor body is provided with several uniform and vertically distributed gas lift pipes, and the gas pipe is provided with a spiral. The baffle plate and the first aerator is installed at the bottom, which can make the gas, sewage and sludge perform an ascending swirling motion in the air lift pipe, increase the residence time of the three in the air lift pipe, improve the hydraulic shear force and Oxygen mass transfer efficiency accelerates the formation of granular sludge. Compared with the existing air-stripping SBR granular sludge reactor, the engineering application potential is greatly improved.

2. Compared with the prior art, in this reactor for strengthening the formation and stable operation of aerobic granular sludge, the reactor according to the present application is provided with a second aerator between the outer walls of adjacent gas pipes, which can control the Dissolved oxygen concentration in the sewage, while disturbing the sludge at the bottom, effectively preventing the sludge from settling to the bottom, reducing the dead zone area in the reactor, and maintaining the stable operation of the particles. In addition, the second aerator provides upward hydraulic shearing Force, gas and sludge form convection up and down, which in turn accelerates the formation of granular sludge.

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

Description of drawings

Fig. 1 is the overall structure schematic diagram of a kind of reactor that strengthens the formation and stable operation of aerobic granular sludge proposed by the utility model;

Fig. 2 is a top view of the reactor main body of a reactor for enhancing the formation and stable operation of aerobic granular sludge proposed by the utility model.

illustration:

1. Reactor main body; 2. Air lift pipe; 3. Spiral baffle; 4. Opening; 5. First aerator; 6. Second aerator; 7. Inlet water pump; 8. Flow meter; 9. Aeration pump; 10. First gas flowmeter; 11. Second gas flowmeter; 12. Drain valve.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work 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" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation to the present invention; the terms "first", "second" and "third" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance. In addition, Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1-2, an embodiment provided by the present invention: a reactor for enhancing the formation and stable operation of aerobic granular sludge, comprising a reactor main body 1, and a gas lifter 2 is arranged inside the reactor main body 1 , the number of stripping tubes 2 is 2-50, and they are evenly and vertically arranged at the bottom of the reactor main body 1, and the ratio between the center distance of adjacent stripping tubes 2 and the inner diameter of the stripping tubes 2 is between 2-10 4-12 openings 4 are spaced at the bottom of the pipe wall of the gas-lifting pipe 2, the top of the gas-lifting pipe 2 is lower than the reactor main body 1, and the height-diameter ratio of the gas-lifting pipe 2 is between 2-8.

The inside of the air lift pipe 2 is provided with a helical baffle 3, the number of rotation rings of the helical baffle 3 is between 1-5, and the ratio of the height of the helical baffle 3 to the air lift pipe 2 is between 0.2-1 In between, a first aerator 5 is arranged at the inner bottom of the air-lifting pipe 2, and the first aerator 5 is arranged at the inner bottom of the air-lifting pipe 2 and below the spiral baffle 3. The first aerator 5 includes A number of microporous aeration discs and aeration pipes, a second aerator 6 is arranged on the outside of the air-lifting pipe 2 and at the bottom between the main body 1 of the reactor, and the second aerator 6 is evenly arranged on the outside of the air-lifting pipe 2 Spatially, the second aerator 6 includes several microporous aeration discs and aeration pipes.

The left side wall of the reactor main body 1 is provided with a water inlet pipe, one side of the water inlet pipe is provided with an inlet pump 7 and a flow meter 8, the right side wall of the reactor main body 1 is provided with a drain pipe, and one side of the drain pipe is provided with a drain pipe. Drain valve 12.

The bottom end of the reactor main body 1 and the bottom end of the stripping pipe 2 are provided with an air inlet pipe, one side of the air inlet pipe is provided with an aeration pump 9, and one side of the air inlet pipe connected with the reactor main body 1 is provided with a second gas flow rate. The meter 11 is provided with a first gas flow meter 10 on the side of the intake pipe connected to the stripping pipe 2 .

Working principle: After the water inlet pipe is completed through the water inlet system, it enters the non-aeration stage. The microorganisms in the sludge decompose organic matter under anoxic and anaerobic conditions, perform denitrification, denitrification and phosphorus release. The first aerator 5 provides a higher aeration flow rate in the air lift pipe 2, and the helical baffles 3 make the sewage, air lift and sludge perform an ascending swirl movement in the air lift pipe 2, and at the same time in the air A negative pressure is formed at the bottom of the air-lifting pipe 2, which promotes the sewage and activated sludge outside the air-lifting pipe 2 to flow into the air-lifting pipe 2 through the openings 4, while the sewage and activated sludge that rise to the top of the air-lifting pipe 2 will flow into the water body. It is driven to descend along the outside of the pipe wall, thereby forming a circulating flow of sewage and sludge inside and outside the air lift pipe 2. The first aerator 5 is combined with the helical baffle plate 3, which is conducive to the formation of higher hydraulic shear force and Action time, accelerate the formation of aerobic granular sludge and maintain its stable structure, the second aerator 6 performs micro-aeration to control the dissolved oxygen concentration in the sewage, the sludge flowing down and the bubbles rising form convection, This is also conducive to the formation of higher hydraulic shear force to accelerate the formation of aerobic granular sludge. In addition, micro-aeration can also disturb the sludge settled at the bottom, effectively preventing the sludge from settling at the bottom and reducing the amount of 1 The dead zone area can maintain the stable operation of the particles. The microorganisms in the sludge degrade the organic matter under aerobic conditions, carry out nitrification and phosphorus uptake, and efficiently remove the pollutants in the sewage. In the precipitation stage, stop aeration to realize the sludge The solid-liquid separation from the water body, the sludge sinks to the bottom, and the purified sewage is discharged from the drainage pipe through the drainage system. Through the above control process, the granulation of the flocculent activated sludge can be quickly completed, the dissolved oxygen can be effectively controlled, the dead zone area can be reduced, the efficient, stable and long-term operation of the aerobic granular sludge reactor can be realized, and the excellent performance can be maintained continuously. sewage purification effect.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model, All should be included within the protection scope of the present invention.

Claims (9)

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).

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