CN205241321U - Finite space high efficiency system of oxygenating - Google Patents

Abstract

The utility model discloses an efficient oxygenation system in a limited space, which comprises an aeration tank, in which a number of deflectors are arranged, and the deflectors divide the aeration tank into several areas, and the several Different numbers of aerators are concentrated in the area according to the dissolved oxygen requirements of the area. The utility model is designed for some deficiencies exposed in the actual operation of the existing aeration system, and can be applied to aerobic biological treatment units of various industrial waste water and domestic sewage. The utility model solves the problems of uneven aeration in the aerobic pool, low overall dissolved oxygen efficiency, sludge accumulation in the pool body, easy shedding of the aerator, blockage, aging, rapid decline in oxygen utilization efficiency, inconvenient management and maintenance, and high cost in the actual project. question.

Description

A highly efficient oxygenation system in a limited space

technical field

The utility model relates to the technical field of sewage and wastewater treatment, in particular to a limited-space efficient oxygenation system for aeration.

Background technique

Aerobic biological treatment process is widely used in various industrial wastewater and urban domestic sewage treatment projects. Aeration is the key process link. Oxygenation is realized in sewage through aeration equipment, which provides oxygen for aerobic microorganisms to decompose organic matter and maintains the activity of aerobic microorganisms. In addition, aeration also plays the role of stirring and mixing to ensure the activity The full contact of sludge, dissolved oxygen and organic pollutants can improve the effect of sewage treatment. Blast aeration is the mainstream aeration method in China, which consists of a blower, an air diffusion device and an air delivery pipeline. According to the size of the bubbles generated, the air diffuser can be divided into micro-bubble diffuser, medium-bubble diffuser and large-bubble diffuser. Theoretically, the smaller the bubbles, the larger the gas-liquid contact area and the higher the oxygen utilization rate, so the membrane microporous aeration device has been widely used due to its high utilization rate. However, in the actual operation of the existing aeration equipment, it is inevitable that the aeration in the aerobic tank is uneven, the overall dissolved oxygen efficiency is low, and the sludge at the bottom of the tank is anaerobic. Such problems as rapid decline in oxygen utilization rate, high energy consumption, and high operating costs are caused by these problems.

At present, most aerobic treatment units use blast aeration, and the diaphragm aerator is a diffuser. Fig. 1 is a schematic diagram of the aeration system, the pressurized air is provided by a blower 30, and the air conveying pipe plays the role of conveying and distributing air, and the diffuser 40 uniformly and fixedly installed at the bottom of the aeration tank is a key part of the entire aeration system. Its function is to disperse the compressed air provided by the blower into the smallest possible bubbles, so as to increase the contact interface between the air and the mixed liquid, and promote the mass transfer process of dissolving the oxygen in the air into the water.

The following problems exist in the actual application of the existing aeration system:

1. The aerators are mostly arranged evenly in the full tank, but in the actual sewage treatment process, along the water flow direction of the aeration tank, the concentration of pollutants gradually decreases, and the uniform distribution of air will lead to insufficient aeration at the front end of the aeration tank and excessive aeration at the end. In order to ensure uniform aeration, it is necessary to increase the aeration volume, resulting in an increase in operating costs;

2. The dissolved oxygen efficiency of the existing aeration system is generally not high. The bubbles formed by the diaphragm aerator used in the aeration system are very small. Although the gas-liquid contact area is increased, the smaller the bubble size, the smaller the bubble size. The slower the movement speed, the less water flow can be formed, and the disturbing effect on the mixed liquid in the tank is not strong, which eventually weakens the oxygen mass transfer process. In addition, the upward one-way aeration method also leads to poor agitation effect on the sludge at the bottom of the tank, resulting in anaerobic oxidation of bottom sludge;

3. The aerator is fixed on the bottom of the pool, and it is easy to fall off during operation, resulting in local deflation, which may eventually lead to the collapse of the aeration system. During replacement and maintenance, production must be stopped and drained;

4. The membrane hole of the diaphragm aerator is small, and the air flow resistance is large, which causes an increase in pressure loss and a corresponding increase in energy consumption;

5. The rubber material used for the diaphragm of the diaphragm aerator is easy to age, and the service life is short, generally 3 years. After the diaphragm is aged and torn, the aeration efficiency drops sharply, resulting in local pressure relief, and the membrane holes are easy to block, especially It is used in sewage with high concentration, high suspended solids, high hardness or easy to scale, and it is difficult to clean, repair and maintain;

6. Disadvantages such as detachment, aging, and easy blockage of the aerator have led to increased maintenance costs, increased sewage treatment operating costs, and even directly affected the normal operation of the sewage treatment process.

Utility model content

The utility model provides a limited-space high-efficiency oxygenation system to solve the problem of uneven aeration in the aerobic pool, low overall dissolved oxygen efficiency, sludge accumulation at the bottom of the pool, easy falling off of the aerator, blockage, aging, and oxygen utilization in the actual project. Rapid decline in efficiency, inconvenient management and maintenance, and high costs.

The technical scheme of the utility model is as follows:

A high-efficiency oxygenation system in a limited space, which includes an aeration tank, and a number of deflectors are arranged in the aeration tank, and the deflectors divide the aeration tank into several areas, and the aeration tanks are divided into several areas according to the Dissolved oxygen in the area requires centralized arrangement of different numbers of aerators.

The utility model adds deflectors in the aeration tank to make the sewage form a suitable flow rate and prolong the hydraulic retention time. At the same time, the aeration tank is divided into several areas, and different numbers of aerators are arranged in each area. , so that the aeration zone and the buffer zone are distributed along the direction of water flow. Compared with the setting method of uniform arrangement of aerators, the centralized arrangement of aerators makes the aeration area and buffer zone distributed along the water flow direction, and the dissolved oxygen concentration in the aeration area is relatively high. The dissolved oxygen in the buffer zone is relatively low. Driven by the water flow, the water in the high dissolved oxygen area quickly flows to the low dissolved oxygen area. Using the difference in dissolved oxygen concentration, a large gradient distribution of dissolved oxygen concentration is caused, which improves the oxygen concentration. The transfer rate greatly increases the oxygenation capacity.

In a preferred embodiment of the present invention, the aerators are arranged in layers in the vertical direction of at least one of the regions. Therefore, the layered arrangement of aerators can be set only in one area, or only in some areas, or all areas. The aerators are arranged in layers in the vertical direction. On the one hand, the aeration in the vertical direction is made uniform, which solves the problem that the bubbles generated by the existing aerators continue to grow larger during the ascent process, and the oxygen mass transfer efficiency is weakened. On the other hand, it also Greatly enhances the water mixing effect.

In a preferred embodiment of the present utility model, the aerator is a rotary-cut mixed-flow aeration device, and the rotary-cut mixed-flow aeration device is mainly composed of an outer cylinder, a central air inlet pipe, a forward swirl plate, and a reverse swirl plate. , flow divider, the central air intake pipe is built vertically and has an air inlet on its upper part, the forward swirl plate and the reverse swirl plate are fixed with the central air intake pipe, the angle of the swirl plate is designed to make the water flow A swirl flow is formed; the flow divider is fixed at the bottom of the central intake pipe. Among them, the air inlet pipe of the rotary shearing mixed flow aeration device is built vertically, which makes the equipment structure more simplified and the air flow smoother. , the role of swirl, can form strong turbulence, when the aeration device is running, it can increase the turbulence of the surrounding mixed liquid, and form a strong stirring effect on the sludge at the bottom of the pool, avoid sludge anaerobic, and greatly enhance oxygen mass transfer process, to achieve efficient oxygenation in a limited space centered on the aerator.

In a preferred embodiment of the present invention, a plurality of collision heads are respectively distributed on the vanes of the forward swirl plate and the reverse swirl plate. The impingement head on the blade is designed to create a large number of tiny air bubbles.

In a preferred embodiment of the present utility model, the lower part of the outer cylinder of the rotary cutting mixed-flow aeration device has a trumpet-shaped water inlet. The trumpet-shaped water inlet design on the outer cylinder of the aerator is conducive to water circulation.

In a preferred embodiment of the present utility model, the rotary cutting mixed-flow aeration device has a large-diameter aeration port, which will not be blocked during aeration, and the air flow can follow the trend of the water flow, which greatly reduces the air flow resistance and saves energy. The effect of reducing consumption is obvious; at the same time, the design of the large-diameter aeration port also avoids the problem of rubber aging of the diaphragm aerator and the easy plugging of the membrane hole.

In a preferred embodiment of the present utility model, the rotary cutting mixed-flow aeration device has no moving parts, will not fall off during operation, has stable performance, has few operating failures, and is basically maintenance-free.

In a preferred embodiment of the present utility model, the rotary-cutting mixed-flow aeration device is connected to the blowing device through a detachable air pipeline, and the rotary-cutting mixed-flow aeration device is set in the aeration tank through a bracket. In the method, the rotary shear mixed-flow aeration device is fixedly connected to the support, and the support is placed on the bottom of the pond and is not fixedly connected to the bottom of the pond. Through the above method, the aerator used in the utility model is simple and convenient to install, and can be put into the water after installation, and because of the detachable design of the air pipeline, the setting of the rotary cutting mixed flow aerator can be lifted, and it is easy to replace and maintain There is no need to stop production and dry out operations, which greatly facilitates operation and maintenance work and greatly reduces operating costs.

In a preferred embodiment of the present utility model, at least one surface of the deflector is provided with a plurality of collision heads. Specifically, multiple collision heads may be provided on both surfaces of the deflector, or multiple collision heads may be provided on only one surface of the deflector. A large number of collision heads are set on the deflector, which can cut the dissolved oxygen in the water flow into tiny bubbles again, increase the gas-liquid contact area, and improve the oxygenation efficiency.

In a preferred embodiment of the present invention, the plurality of collision heads includes a plurality of large collision heads and a plurality of small collision heads arranged at intervals.

In some preferred implementations of the present utility model, the deflector divides the aeration tank into 2-3 areas.

In some preferred embodiments of the present utility model, the several areas include at least a front section, and the number of aerators in the front section is greater than the number of aerators in other areas. This arrangement meets the requirement of high oxygen demand in the front section, realizes the balance between oxygen supply and oxygen demand, and is conducive to saving energy consumption and reducing operating costs.

In one embodiment of the present utility model, for a typical plug-flow aeration tank, the deflector divides the aeration tank into three areas, and the number of aerators is set as "front section > middle section > back section".

Compared with the prior art, the beneficial effects of the utility model are as follows:

First. The utility model makes the sewage form a suitable flow velocity and prolongs the hydraulic retention time by adding deflectors in the aeration tank, and at the same time divides the aeration tank into several areas, and arranges different numbers in each area ( For example, the aerators in the front section>middle section>back section) make the aeration area and buffer zone distributed along the direction of water flow. According to the gas-liquid mass transfer theory, the controlling factors of the oxygenation process are the gas-liquid contact area and the concentration gradient of dissolved oxygen. When the aerators are evenly arranged, for each aerator, the dissolved oxygen in the surrounding liquid film The concentration is relatively uniform, and the concentration gradient of dissolved oxygen can also be regarded as equal. In this state, the mass transfer kinetics of oxygen is relatively small. However, when the aerators are arranged in a concentrated manner, the dissolved oxygen concentration in the aeration zone is relatively high, and the dissolved oxygen in the buffer zone is relatively low. Driven by the water flow, the water in the high dissolved oxygen zone quickly flows to the low dissolved oxygen zone. The difference in the level of dissolved oxygen concentration causes a large gradient distribution of dissolved oxygen concentration, which improves the oxygen transfer rate and greatly increases the oxygenation capacity. In addition, a large number of collision heads are distributed on the deflector, which can cut the dissolved oxygen in the water flow into tiny bubbles again, increase the gas-liquid contact area, and improve the oxygenation efficiency. Finally, this arrangement meets the requirement of high oxygen demand at the front end, realizes the balance between oxygen supply and oxygen demand, and is conducive to saving energy consumption and reducing operating costs;

Second. The utility model proposes the concept of efficient oxygenation in a limited space, and adopts various measures to greatly strengthen the mass transfer process between gas and liquid: (1) The new swirl shear aerator is adopted, which can not only form a large number of tiny bubbles during operation , can also form a strong rotating water flow centered on the aerator, which improves the turbulent flow of the surrounding mixed liquid and the strong stirring effect on the sludge at the bottom of the pool, avoids sludge anaerobic, and greatly strengthens the oxygen mass transfer process. High-efficiency oxygenation can be achieved in a limited space centered on the aerator; (2) The multi-layer arrangement of the aerator in the vertical direction and the setting of the aeration zone and the buffer zone, on the one hand, make the aeration uniform in the vertical direction, and solve the problem of existing aeration problems. The air bubbles generated by the aerator continue to grow larger during the ascent, and the oxygen mass transfer efficiency is weakened. Energy consumption and cost saving; (3) By setting deflectors, on the one hand, the hydraulic retention time is extended, and on the other hand, the aeration tank is divided into several areas, and different numbers of aerators are arranged in different areas, which balances the oxygen supply and Oxygen is required to achieve on-demand distribution. The entire pool is equivalent to a combination of a large number of high-efficiency oxygenation units, which solves the problem of low dissolved oxygen efficiency in the existing aeration system, and fully meets the policy requirements of energy saving and cost saving. business needs;

3. The aerator used in the utility model is easy to install, and can be put into the water after installation, and there is no need to stop production and drain during replacement and maintenance;

Fourth. There are no moving parts in the aerator adopted by the utility model, and there will be no falling off during operation;

Fifth. The aerator adopted in the utility model has a large-diameter aeration port, which will not be blocked during aeration, and the air flow can follow the trend of the water flow, greatly reducing the air flow resistance, and the effect of energy saving and consumption reduction is obvious; at the same time, The design of the large-diameter aeration port also avoids the aging and easy blocking of the diaphragm in the diaphragm aerator.

Sixth. Combining the above-mentioned third to fifth items, the aerator adopted in the utility model adopts a large-diameter aeration port and has no moving parts inside, so there will be no problems such as shedding, material aging, and membrane hole blockage, and the performance is stable , there are very few operating failures, and it can basically be maintenance-free. Even if necessary, because the device can be lifted, there is no need to stop production and drain operations, which greatly facilitates operation and maintenance work and greatly reduces operating costs.

Of course, any product implementing the present utility model does not necessarily need to achieve all the above-mentioned advantages at the same time.

Description of drawings

Fig. 1 is the schematic diagram of aeration system in the prior art;

Fig. 2 is a schematic diagram of the vertical internal structure layout of the limited-space high-efficiency oxygenation system of the utility model embodiment;

Fig. 3 is the schematic diagram of the connection of parts labeled 9 and 7 in Fig. 2;

Fig. 4 is a structural schematic diagram of a deflector of a limited-space efficient oxygenation system according to an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the rotary cutting mixed flow aeration device of the limited space high-efficiency oxygenation system according to the embodiment of the present invention;

6 is a schematic structural view of the forward swirling plate of the rotary cutting mixed flow aeration device of the limited space efficient oxygenation system of the embodiment of the utility model;

Fig. 7 is a structural schematic diagram of the reverse swirl plate of the rotary cutting mixed flow aeration device of the limited space high-efficiency oxygenation system according to the embodiment of the utility model;

Among them, 1—inlet pipe; 2—aeration tank; 3—aeration area; 4—buffer zone; 5—deflector; 6—outlet pipe; 7—rotary cutting mixed flow aeration device; Air delivery pipeline; 9-1—air pipeline; 9-2—air pipeline; 10—small collision head (deflector); 11—big collision head (deflector); 12—flange; 13 —air intake pipe; 14—water outlet; 15—outer cylinder; 16—forward swirling plate; 17—rising channel; 18—reverse swirling plate; 19—splitter; 20—horn water inlet; 21—fixed component; 22—collision head (on the swirl plate).

detailed description

In view of the fact that the existing aeration equipment inevitably has uneven aeration in the aerobic tank during the actual operation process, the overall dissolved oxygen efficiency is low, and the sludge at the bottom of the tank is anaerobic. Due to the rapid decline in oxygen utilization rate, high energy consumption, and high operating costs, some people realize the on-demand operation of the aeration system through self-control methods to reduce energy consumption. new aeration device. Looking at all these means, improving the efficiency of dissolved oxygen is its essence. The dissolved oxygen efficiency is closely related to the form of the aeration tank, the structure and arrangement of the aeration device, the flow state of the water in the aeration tank, and the quality of the sewage. The utility model is to improve the form of the aeration device, the layout method, the form of the aeration tank, the flow state of the water flow, etc. in multiple dimensions, and proposes the concept of efficient oxygenation in a limited space, forming a different from the existing membrane-type micropores. Efficient oxygenation system for aeration.

The utility model provides a limited space efficient oxygenation system for the above-mentioned shortcomings exposed in the actual operation of the existing aeration system, which can be applied to aerobic biological treatment units of various industrial wastewater and domestic sewage. The utility model will be further described below in conjunction with specific drawings and embodiments. Wherein, the components and devices in the drawings are only for illustration, and their shapes and relative proportions are not drawn strictly according to the actual shapes and proportions.

Example

This embodiment adopts a new type of aerator, and integrates centralized aeration and zoned oxygen supply technologies to provide an efficient oxygenation system in a limited space.

Please refer to Figure 2, a limited space efficient oxygenation system provided by this embodiment, including:

Aeration tank (2),

Several deflectors (5) are added in the aeration tank (2), and the aeration tank (2) is divided into several areas (as shown in Figure 2 as three areas I, II, III, in other embodiments There may also be two areas), and different numbers of aerators are concentratedly arranged in each area according to the specific situation of oxygen demand, specifically, in this embodiment, it is a rotary-cut mixed-flow aeration device (7). According to the specific situation of oxygen demand, different numbers of rotary cutting mixed flow aeration devices are arranged to balance oxygen supply and demand, realize distribution on demand, which is beneficial to save energy consumption and reduce operating costs, and the centralized arrangement is also formed along the direction of water flow The aeration zone (3) and the buffer zone (4) are distributed at intervals.

Because usually in the aeration tank, the oxygen consumption in the front section is greater than that in other areas, therefore, it is preferable to arrange more aerators in the front section than in other areas. For example, for a typical push-flow aeration tank, microorganisms consume about 70%, and the oxygen consumption in the second half accounts for 30%. According to this, the oxygen supply distribution is designed, and the number of aerators can be set as "front section (area I) > middle section (area II) > rear section (area III)";

At the same time, in at least one area or in some areas or in all areas, the aerators are vertically arranged in layers, as shown in Figure 2 and Figure 3, in this embodiment, the aerators in all areas are It is arranged in two floors. The compressed air is provided by the blower (8) and delivered to the rotary cutting mixed flow aeration device (7) through the air delivery pipeline. Because the angle of view in Fig. 2 is difficult to reflect the true connection relationship between the air delivery pipeline 9 and the rotary shear mixed-flow aeration device (7), therefore, the air delivery pipeline marked as 9 in Fig. 2 only shows that there is air input in the aeration tank, In Figure 2, the relative positional relationship, especially the connection relationship, between the air delivery pipeline marked 9 and the rotary shear mixed-flow aeration device marked 7 is not shown. This phenomenon in the figure does not represent the relationship between the two. is not connected. Specifically, please refer to FIG. 3 for details about the relative positional relationship and connection relationship between the air delivery pipeline marked 9 and the rotary shear mixed flow aeration device marked 7 shown in FIG. 2 . The air delivery pipe 9 may include an air main pipe and an air branch pipe. In Fig. 3, the main air pipe (9-3) is connected to the rotary cutting mixed flow aeration device (7) through the air branch pipes (9-1) and (9-2). During installation, only the rotary cutting mixed flow aeration The device (7) and the air branch pipe (9-2) are fixed, if the rotary cutting mixed flow aeration device (7) needs to be lifted out of the tank, only need to disconnect the air branch pipe (9-2) and the air branch pipe (9-1) connection.

Deflector (5):

The deflector (5) is fixed on the pool wall of the aeration tank (2) through such as a card slot. In this embodiment, a large number of collision heads are distributed on both surfaces of the deflector (5). In other embodiments Among them, a large number of collision heads may be distributed on one surface of the deflector, or some deflectors are provided with collision heads for two surfaces, and some deflectors are provided with collision heads for one surface, which is not particularly limited in the present invention. These collision heads can include a plurality of small collision heads 10 and a plurality of large collision heads 11 arranged at intervals, as shown in Figure 4, they can cut the dissolved oxygen in the water flow into tiny bubbles again, increase the gas-liquid contact area, improve Oxygenation efficiency.

Rotary cutting mixed flow aeration device (7):

Please refer to Fig. 5, the rotary cutting mixed flow aeration device (7) is mainly composed of an outer cylinder (15), a central air inlet pipe (13), a forward swirl plate (16), a reverse swirl plate (18), a flow divider (19 ), there is a buffer space (17) between the forward swirl plate (16) and the reverse swirl plate (18). Wherein, the intake pipe (13) is connected with the air pipeline (9-2) through the flange (12). The lower part of the urceolus (15) is designed as a trumpet-shaped water inlet (20), and the forward swirl plate (16) and the reverse swirl plate (18) are fixed with the center air intake pipe (13). A diverter (19) is connected to the bottom of the intake pipe, and the gas-water mixture passes through the reverse swirl plate (18)-buffer space (17)-forward swirl plate (16) to swirl up, and is continuously swirled by the forward swirl The plate (16) and the collision heads (21) distributed on the reverse swirl plate (18) (as shown in Figure 6) cut to form a large number of tiny bubbles, which are finally swirled out through the upper water outlet (14).

The rotary cutting mixed flow aeration device (7) can replace the existing conventional membrane type aerator and the aeration device with similar functions.

In this embodiment, the rotary cutting mixed-flow aeration device (7) has a large-diameter aeration port, which will not be blocked during aeration, and the air flow can follow the trend of the water flow, which greatly reduces the air flow resistance and saves energy. Obviously; at the same time, the design of the large-diameter aeration port also avoids the problem of rubber aging of the diaphragm aerator and easy blockage of the membrane hole.

In this embodiment, the rotary cutting mixed-flow aeration device has no moving parts, no falling off during operation, stable performance, few operating failures, and basically maintenance-free.

The rotary cutting mixed-flow aeration device (7) is not fixed on the bottom of the pool, but is set about 20-30 cm away from the bottom of the pool, and is fixed with a support by a member (21) arranged on it, and then the support is placed on the bottom of the pool, But the support is not fixed at the bottom of the pool, but it is fixed by the force formed between the air branch pipe (9-2) and the support. During installation, it is only necessary to fix the air inlet pipe (13) and the air branch pipe (9-2) of the aeration device (7) connected with the bracket and put it into the pool, which simplifies and facilitates the installation procedure. The rotary cutting mixed-flow aeration device (7) itself usually does not have any problems, and is basically maintenance-free. If it needs to be replaced or removed in other situations, it is only necessary to connect the air branch pipe (9-1) to the air branch pipe ( 9-2) to remove the flange, and then lift the rotary cutting mixed flow aeration device (7) through the air branch pipe (9-2). There is no need to stop production and drain during replacement and maintenance, and the replacement and maintenance procedure is simple. It greatly facilitates the operation and maintenance work.

The flow of the limited space efficient oxygenation system in this embodiment for aeration treatment is exemplified as follows:

Sewage enters the aeration tank (2) through the water inlet pipe (1), and undergoes aerobic treatment in areas I, II, and III in sequence, and its outlet water is connected to subsequent structures through the outlet pipe (6). The arrangement of the deflector (5) enables the sewage to form a suitable flow velocity, prolongs the hydraulic retention time, and at the same time divides the aeration tank (2) into different regions. Moreover, different numbers of rotary cutting mixed-flow aeration devices (7) are arranged according to the requirements of dissolved oxygen in different regions, so as to balance oxygen supply and demand and realize distribution on demand. The aerators are arranged in layers in the vertical direction. On the one hand, the aeration in the vertical direction is made uniform, which solves the problem that the bubbles generated by the existing aerators continue to grow larger during the ascent process, and the oxygen mass transfer efficiency is weakened. On the other hand, it also Greatly enhances the water mixing effect. In addition, the centralized arrangement of the aerators makes an aeration zone (3) and a buffer zone (4) formed in each area, the dissolved oxygen concentration in the aeration zone (3) is relatively high, and the dissolved oxygen in the buffer zone (4) is relatively high. Under the impetus of the water flow, the water in the high dissolved oxygen area quickly flows to the low dissolved oxygen area, using the difference in dissolved oxygen concentration to cause a large gradient distribution of dissolved oxygen concentration, which improves the oxygen transfer rate and greatly increases Oxygenation capacity. When the sewage from the buffer zone passes through the deflector (5), the dissolved oxygen in it is cut into tiny bubbles again by a large number of collision heads (10, 11) distributed on the deflector (5), increasing the gas-liquid contact area and improving oxygenation efficiency. The inlet pipe (13) of the rotary cutting mixed-flow aeration device (7) adopted by the utility model is connected with the external air pipeline (9-2) through the flange (12), and the compressed air provided by the blower (8) flows from the inlet pipe (13) enters, through the diversion effect of the flow divider (19), the high-pressure air is diffused to the surroundings, and the water flow is strongly attracted to enter from the trumpet-shaped inlet (20), and the fluid passes through the reverse swirl plate (18)-buffer space (17) —Spirally ascending along the structure of the swirl plate (16), the repeated collision and shearing of the colliding heads (21) scattered on the swirl plates (16, 18) will form numerous microscopic bubbles , greatly increasing the gas-water contact area, and the strong mixed flow state greatly improves the mass transfer efficiency, and finally the turbulent flow containing countless tiny bubbles is sprayed out from the water outlet (14) at the top of the equipment, and spreads rapidly to realize efficient oxygenation of sewage the goal of. The powerful rotating water flow centered on the rotary cutting mixed flow aeration device (7) formed during the aeration process has a good stirring effect on the water body, avoiding the sludge that often occurs at the bottom of the pool in actual engineering. , which avoids the unfavorable situation of local anaerobic.

The large-diameter aeration port of the rotary cutting mixed-flow aeration device (7) and the gas flow potential along the water greatly reduce the air flow resistance and significantly reduce energy consumption. The collision head continuously shears the air bubbles, forming countless tiny air bubbles. The air-water contact area is greatly increased, and finally the air-water turbulent flow rotates and sprays out, spreading rapidly, greatly increasing the service area. The aeration device solves the problems of the existing aerators such as short service life, difficult maintenance, high energy consumption, rapid decline in oxygen utilization rate due to blockage, aging and the like. In short, the whole pool body is equivalent to a combination of a large number of high-efficiency oxygenation units, which solves the problems of uneven aeration and low overall dissolved oxygen efficiency in the existing aeration system, and fully meets the policy requirements of energy saving and consumption reduction and cost saving. business needs.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. The invention is to be limited only by the claims and their full scope and equivalents.

Claims (12)

1. the efficient oxygenating system of the confined space, it is characterized in that, comprise aeration tank, some deflectors are set in described aeration tank, described aeration tank is divided into some regions by those deflectors, in described some regions, require respectively the aerator of centralized arrangement varying number according to the dissolved oxygen in this region, described aerator is rotary-cut mixed flow aerator, described rotary-cut mixed flow aerator is mainly by urceolus, central intake pipe, forward spiral board, reverse spiral board, current divider composition, described central intake pipe vertically built-in and its top has air inlet, described forward spiral board and reverse spiral board and described central intake pipe are fixed, described current divider is fixed on the bottom of described central intake pipe.

2. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, described at least one, in the vertical direction in region, described aerator layering is laid.

3. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, is distributed with respectively multiple impact head on the blade of described forward spiral board and reverse spiral board.

4. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, the urceolus bottom of described rotary-cut mixed flow aerator has horn-like water inlet.

5. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, described rotary-cut mixed flow aerator has heavy caliber aeration opening.

6. the efficient oxygenating system of the confined space as described in claim 1 or 5, is characterized in that, and the inner no-movable part of described rotary-cut mixed flow aerator.

7. the efficient oxygenating system of the confined space as claimed in claim 1, it is characterized in that, described rotary-cut mixed flow aerator is connected by dismountable air pipe line with air-blast device, and described rotary-cut mixed flow aerator is arranged in described aeration tank by support, described rotary-cut mixed flow aerator is fixedly connected with described support, and described stentplacement is at the bottom of pond and with at the bottom of described pond be not fixedly connected with.

8. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, at least one surface of described deflector is provided with multiple impact head.

9. the efficient oxygenating system of the confined space as claimed in claim 8, is characterized in that, described multiple impact head comprise spaced multiple large impact head and multiple little impact head.

10. the efficient oxygenating system of the confined space as claimed in claim 1, is characterized in that, described aeration tank is divided into 2-3 region by described deflector.

The efficient oxygenating system of 11. confined space as claimed in claim 1, is characterized in that, described some regions at least comprise a leading portion, and the aerator quantity that described leading portion is arranged is greater than the aerator quantity that other region is arranged.

12. efficient oxygenating systems of the confined space as described in claim 10 or 11, it is characterized in that, for typical plug-flow aeration tank, described aeration tank is divided into leading portion, stage casing, 3 regions of back segment by described deflector, and described aerator quantity is set to " leading portion > stage casing > back segment ".